Ultrasonography applying the Doppler effect, with frequency-shifted ultrasound reflections produced by moving targets (usually red blood cells) in the bloodstream along the ultrasound axis in direct proportion to the velocity of movement of the targets, to determine both direction and velocity of blood flow. (Stedman, 25th ed)
The visualization of deep structures of the body by recording the reflections or echoes of ultrasonic pulses directed into the tissues. Use of ultrasound for imaging or diagnostic purposes employs frequencies ranging from 1.6 to 10 megahertz.
Ultrasonography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image. This type of ultrasonography is well-suited to identifying the location of high-velocity flow (such as in a stenosis) or of mapping the extent of flow in a certain region.
Ultrasonography applying the Doppler effect, with velocity detection combined with range discrimination. Short bursts of ultrasound are transmitted at regular intervals and the echoes are demodulated as they return.
Changes in the observed frequency of waves (as sound, light, or radio waves) due to the relative motion of source and observer. The effect was named for the 19th century Austrian physicist Johann Christian Doppler.
A non-invasive technique using ultrasound for the measurement of cerebrovascular hemodynamics, particularly cerebral blood flow velocity and cerebral collateral flow. With a high-intensity, low-frequency pulse probe, the intracranial arteries may be studied transtemporally, transorbitally, or from below the foramen magnum.
The visualization of tissues during pregnancy through recording of the echoes of ultrasonic waves directed into the body. The procedure may be applied with reference to the mother or the fetus and with reference to organs or the detection of maternal or fetal disease.
A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.
Echocardiography applying the Doppler effect, with velocity detection combined with range discrimination. Short bursts of ultrasound are transmitted at regular intervals and the echoes are demodulated as they return.
Echocardiography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image.
Ultrasonography applying the Doppler effect combined with real-time imaging. The real-time image is created by rapid movement of the ultrasound beam. A powerful advantage of this technique is the ability to estimate the velocity of flow from the Doppler shift frequency.
Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)
Ultrasonography of internal organs using an ultrasound transducer sometimes mounted on a fiberoptic endoscope. In endosonography the transducer converts electronic signals into acoustic pulses or continuous waves and acts also as a receiver to detect reflected pulses from within the organ. An audiovisual-electronic interface converts the detected or processed echo signals, which pass through the electronics of the instrument, into a form that the technologist can evaluate. The procedure should not be confused with ENDOSCOPY which employs a special instrument called an endoscope. The "endo-" of endosonography refers to the examination of tissue within hollow organs, with reference to the usual ultrasonography procedure which is performed externally or transcutaneously.
A method of non-invasive, continuous measurement of MICROCIRCULATION. The technique is based on the values of the DOPPLER EFFECT of low-power laser light scattered randomly by static structures and moving tissue particulates.
The use of ultrasound to guide minimally invasive surgical procedures such as needle ASPIRATION BIOPSY; DRAINAGE; etc. Its widest application is intravascular ultrasound imaging but it is useful also in urology and intra-abdominal conditions.
Rhythmic, intermittent propagation of a fluid through a BLOOD VESSEL or piping system, in contrast to constant, smooth propagation, which produces laminar flow.
Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.
The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.
Use of ultrasound for imaging the breast. The most frequent application is the diagnosis of neoplasms of the female breast.
Specialized arterial vessels in the umbilical cord. They carry waste and deoxygenated blood from the FETUS to the mother via the PLACENTA. In humans, there are usually two umbilical arteries but sometimes one.
The flow of BLOOD through or around an organ or region of the body.
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
Substances used to allow enhanced visualization of tissues.
In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test.
Sulfur hexafluoride. An inert gas used mainly as a test gas in respiratory physiology. Other uses include its injection in vitreoretinal surgery to restore the vitreous chamber and as a tracer in monitoring the dispersion and deposition of air pollutants.
Pathophysiological conditions of the FETUS in the UTERUS. Some fetal diseases may be treated with FETAL THERAPIES.
Tomography using x-ray transmission and a computer algorithm to reconstruct the image.
The failure by the observer to measure or identify a phenomenon accurately, which results in an error. Sources for this may be due to the observer's missing an abnormality, or to faulty technique resulting in incorrect test measurement, or to misinterpretation of the data. Two varieties are inter-observer variation (the amount observers vary from one another when reporting on the same material) and intra-observer variation (the amount one observer varies between observations when reporting more than once on the same material).
The process of generating three-dimensional images by electronic, photographic, or other methods. For example, three-dimensional images can be generated by assembling multiple tomographic images with the aid of a computer, while photographic 3-D images (HOLOGRAPHY) can be made by exposing film to the interference pattern created when two laser light sources shine on an object.
The age of the conceptus, beginning from the time of FERTILIZATION. In clinical obstetrics, the gestational age is often estimated as the time from the last day of the last MENSTRUATION which is about 2 weeks before OVULATION and fertilization.
Post-systolic relaxation of the HEART, especially the HEART VENTRICLES.
Use of reflected ultrasound in the diagnosis of intracranial pathologic processes.
The circulation of BLOOD, of both the mother and the FETUS, through the PLACENTA.
The circulation of blood through the BLOOD VESSELS of the BRAIN.
The hollow thick-walled muscular organ in the female PELVIS. It consists of the fundus (the body) which is the site of EMBRYO IMPLANTATION and FETAL DEVELOPMENT. Beyond the isthmus at the perineal end of fundus, is CERVIX UTERI (the neck) opening into VAGINA. Beyond the isthmi at the upper abdominal end of fundus, are the FALLOPIAN TUBES.
A subfield of acoustics dealing in the radio frequency range higher than acoustic SOUND waves (approximately above 20 kilohertz). Ultrasonic radiation is used therapeutically (DIATHERMY and ULTRASONIC THERAPY) to generate HEAT and to selectively destroy tissues. It is also used in diagnostics, for example, ULTRASONOGRAPHY; ECHOENCEPHALOGRAPHY; and ECHOCARDIOGRAPHY, to visually display echoes received from irradiated tissues.
The failure of a FETUS to attain its expected FETAL GROWTH at any GESTATIONAL AGE.
The largest of the cerebral arteries. It trifurcates into temporal, frontal, and parietal branches supplying blood to most of the parenchyma of these lobes in the CEREBRAL CORTEX. These are the areas involved in motor, sensory, and speech activities.
Pathological conditions involving the CAROTID ARTERIES, including the common, internal, and external carotid arteries. ATHEROSCLEROSIS and TRAUMA are relatively frequent causes of carotid artery pathology.
A cutaneous pouch of skin containing the testicles and spermatic cords.
Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.
The heart of the fetus of any viviparous animal. It refers to the heart in the postembryonic period and is differentiated from the embryonic heart (HEART/embryology) only on the basis of time.
The force that opposes the flow of BLOOD through a vascular bed. It is equal to the difference in BLOOD PRESSURE across the vascular bed divided by the CARDIAC OUTPUT.
The middle third of a human PREGNANCY, from the beginning of the 15th through the 28th completed week (99 to 196 days) of gestation.
The valve between the left atrium and left ventricle of the heart.
Improvement of the quality of a picture by various techniques, including computer processing, digital filtering, echocardiographic techniques, light and ultrastructural MICROSCOPY, fluorescence spectrometry and microscopy, scintigraphy, and in vitro image processing at the molecular level.
Radiography of blood vessels after injection of a contrast medium.
Artery originating from the internal carotid artery and distributing to the eye, orbit and adjacent facial structures.
Radiography of any part of the urinary tract.
Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues. The standard approach is transthoracic.
The vessels carrying blood away from the heart.
General term for CYSTS and cystic diseases of the OVARY.
The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.
Either of the two principal arteries on both sides of the neck that supply blood to the head and neck; each divides into two branches, the internal carotid artery and the external carotid artery.
Period of contraction of the HEART, especially of the HEART VENTRICLES.
Any fluid-filled closed cavity or sac that is lined by an EPITHELIUM. Cysts can be of normal, abnormal, non-neoplastic, or neoplastic tissues.
An infant during the first month after birth.
The arterial blood vessels supplying the CEREBRUM.
Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.
A short thick vein formed by union of the superior mesenteric vein and the splenic vein.
Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.
The hemodynamic and electrophysiological action of the left HEART VENTRICLE. Its measurement is an important aspect of the clinical evaluation of patients with heart disease to determine the effects of the disease on cardiac performance.
The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality.
Pathological processes of the TESTIS.
The genital canal in the female, extending from the UTERUS to the VULVA. (Stedman, 25th ed)
The last third of a human PREGNANCY, from the beginning of the 29th through the 42nd completed week (197 to 294 days) of gestation.
Narrowing or stricture of any part of the CAROTID ARTERIES, most often due to atherosclerotic plaque formation. Ulcerations may form in atherosclerotic plaques and induce THROMBUS formation. Platelet or cholesterol emboli may arise from stenotic carotid lesions and induce a TRANSIENT ISCHEMIC ATTACK; CEREBROVASCULAR ACCIDENT; or temporary blindness (AMAUROSIS FUGAX). (From Adams et al., Principles of Neurology, 6th ed, pp 822-3)
Care given during the period prior to undergoing surgery when psychological and physical preparations are made according to the special needs of the individual patient. This period spans the time between admission to the hospital to the time the surgery begins. (From Dictionary of Health Services Management, 2d ed)
Any device or element which converts an input signal into an output signal of a different form. Examples include the microphone, phonographic pickup, loudspeaker, barometer, photoelectric cell, automobile horn, doorbell, and underwater sound transducer. (McGraw Hill Dictionary of Scientific and Technical Terms, 4th ed)
The articulation between a metacarpal bone and a phalanx.
The study of the deformation and flow of matter, usually liquids or fluids, and of the plastic flow of solids. The concept covers consistency, dilatancy, liquefaction, resistance to flow, shearing, thixotrophy, and VISCOSITY.
Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.
That portion of the body that lies between the THORAX and the PELVIS.
The circulation of blood through the CORONARY VESSELS of the HEART.
The beginning third of a human PREGNANCY, from the first day of the last normal menstrual period (MENSTRUATION) through the completion of 14 weeks (98 days) of gestation.
PRESSURE of the BLOOD on the ARTERIES and other BLOOD VESSELS.
Elements of limited time intervals, contributing to particular results or situations.
Pathological processes which result in the partial or complete obstruction of ARTERIES. They are characterized by greatly reduced or absence of blood flow through these vessels. They are also known as arterial insufficiency.
Application of fingers with light pressure to the surface of the body to determine consistence of parts beneath in physical diagnosis; includes palpation for determining the outlines of organs.
The heart rate of the FETUS. The normal range at term is between 120 and 160 beats per minute.
A branch arising from the internal iliac artery in females, that supplies blood to the uterus.
The unborn young of a viviparous mammal, in the postembryonic period, after the major structures have been outlined. In humans, the unborn young from the end of the eighth week after CONCEPTION until BIRTH, as distinguished from the earlier EMBRYO, MAMMALIAN.
A small circumscribed mass in the THYROID GLAND that can be of neoplastic growth or non-neoplastic abnormality. It lacks a well-defined capsule or glandular architecture. Thyroid nodules are often benign but can be malignant. The growth of nodules can lead to a multinodular goiter (GOITER, NODULAR).
Appendages of the UTERUS which include the FALLOPIAN TUBES, the OVARY, and the supporting ligaments of the uterus (BROAD LIGAMENT; ROUND LIGAMENT).
Act of listening for sounds within the body.
A graphic means for assessing the ability of a screening test to discriminate between healthy and diseased persons; may also be used in other studies, e.g., distinguishing stimuli responses as to a faint stimuli or nonstimuli.
Discrete abnormal tissue masses that protrude into the lumen of the DIGESTIVE TRACT or the RESPIRATORY TRACT. Polyps can be spheroidal, hemispheroidal, or irregular mound-shaped structures attached to the MUCOUS MEMBRANE of the lumen wall either by a stalk, pedunculus, or by a broad base.
Tumors or cancer of the LIVER.
A condition in which the LEFT VENTRICLE of the heart was functionally impaired. This condition usually leads to HEART FAILURE; MYOCARDIAL INFARCTION; and other cardiovascular complications. Diagnosis is made by measuring the diminished ejection fraction and a depressed level of motility of the left ventricular wall.
Veins which drain the liver.
Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.
The condition of an anatomical structure's being constricted beyond normal dimensions.
Positive test results in subjects who do not possess the attribute for which the test is conducted. The labeling of healthy persons as diseased when screening in the detection of disease. (Last, A Dictionary of Epidemiology, 2d ed)
Physiologic or biochemical monitoring of the fetus. It is usually done during LABOR, OBSTETRIC and may be performed in conjunction with the monitoring of uterine activity. It may also be performed prenatally as when the mother is undergoing surgery.
A storage reservoir for BILE secretion. Gallbladder allows the delivery of bile acids at a high concentration and in a controlled manner, via the CYSTIC DUCT to the DUODENUM, for degradation of dietary lipid.
Methods developed to aid in the interpretation of ultrasound, radiographic images, etc., for diagnosis of disease.
Diseases of the uterine appendages (ADNEXA UTERI) including diseases involving the OVARY, the FALLOPIAN TUBES, and ligaments of the uterus (BROAD LIGAMENT; ROUND LIGAMENT).
Inflammation of a synovial membrane. It is usually painful, particularly on motion, and is characterized by a fluctuating swelling due to effusion within a synovial sac. (Dorland, 27th ed)
Abnormal enlargement or swelling of a KIDNEY due to dilation of the KIDNEY CALICES and the KIDNEY PELVIS. It is often associated with obstruction of the URETER or chronic kidney diseases that prevents normal drainage of urine into the URINARY BLADDER.
The inferior part of the lower extremity between the KNEE and the ANKLE.
Levels within a diagnostic group which are established by various measurement criteria applied to the seriousness of a patient's disorder.
The articulation between the head of one phalanx and the base of the one distal to it, in each toe.
The part of a human or animal body connecting the HEAD to the rest of the body.
Any visual display of structural or functional patterns of organs or tissues for diagnostic evaluation. It includes measuring physiologic and metabolic responses to physical and chemical stimuli, as well as ultramicroscopy.
Patient care procedures performed during the operation that are ancillary to the actual surgery. It includes monitoring, fluid therapy, medication, transfusion, anesthesia, radiography, and laboratory tests.
The constant checking on the state or condition of a patient during the course of a surgical operation (e.g., checking of vital signs).
Results of conception and ensuing pregnancy, including LIVE BIRTH; STILLBIRTH; SPONTANEOUS ABORTION; INDUCED ABORTION. The outcome may follow natural or artificial insemination or any of the various ASSISTED REPRODUCTIVE TECHNIQUES, such as EMBRYO TRANSFER or FERTILIZATION IN VITRO.
An aspect of personal behavior or lifestyle, environmental exposure, or inborn or inherited characteristic, which, on the basis of epidemiologic evidence, is known to be associated with a health-related condition considered important to prevent.
Embolism or thrombosis involving blood vessels which supply intracranial structures. Emboli may originate from extracranial or intracranial sources. Thrombosis may occur in arterial or venous structures.
Procedures in which placement of CARDIAC CATHETERS is performed for therapeutic or diagnostic procedures.
Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues using a transducer placed in the esophagus.
The circulation of the BLOOD through the MICROVASCULAR NETWORK.
A method of delineating blood vessels by subtracting a tissue background image from an image of tissue plus intravascular contrast material that attenuates the X-ray photons. The background image is determined from a digitized image taken a few moments before injection of the contrast material. The resulting angiogram is a high-contrast image of the vessel. This subtraction technique allows extraction of a high-intensity signal from the superimposed background information. The image is thus the result of the differential absorption of X-rays by different tissues.
The vein accompanying the femoral artery in the same sheath; it is a continuation of the popliteal vein and becomes the external iliac vein.
The vessels carrying blood away from the capillary beds.
A branch of the abdominal aorta which supplies the kidneys, adrenal glands and ureters.
The amount of BLOOD pumped out of the HEART per beat, not to be confused with cardiac output (volume/time). It is calculated as the difference between the end-diastolic volume and the end-systolic volume.
Bleeding from blood vessels in the UTERUS, sometimes manifested as vaginal bleeding.
The reproductive organ (GONADS) in female animals. In vertebrates, the ovary contains two functional parts: the OVARIAN FOLLICLE for the production of female germ cells (OOGENESIS); and the endocrine cells (GRANULOSA CELLS; THECA CELLS; and LUTEAL CELLS) for the production of ESTROGENS and PROGESTERONE.
Determination of the nature of a pathological condition or disease in the postimplantation EMBRYO; FETUS; or pregnant female before birth.
A vascular anomaly due to proliferation of BLOOD VESSELS that forms a tumor-like mass. The common types involve CAPILLARIES and VEINS. It can occur anywhere in the body but is most frequently noticed in the SKIN and SUBCUTANEOUS TISSUE. (from Stedman, 27th ed, 2000)
Blocking of a blood vessel in the SKULL by an EMBOLUS which can be a blood clot (THROMBUS) or other undissolved material in the blood stream. Most emboli are of cardiac origin and are associated with HEART DISEASES. Other non-cardiac sources of emboli are usually associated with VASCULAR DISEASES.
Clinical syndrome describing overuse tendon injuries characterized by a combination of PAIN, diffuse or localized swelling, and impaired performance. Distinguishing tendinosis from tendinitis is clinically difficult and can be made only after histopathological examination.
Removal and examination of tissue obtained through a transdermal needle inserted into the specific region, organ, or tissue being analyzed.
A technique of inputting two-dimensional images into a computer and then enhancing or analyzing the imagery into a form that is more useful to the human observer.
Backflow of blood from the RIGHT VENTRICLE into the RIGHT ATRIUM due to imperfect closure of the TRICUSPID VALVE.
Physical activity of the FETUS in utero. Gross or fine fetal body movement can be monitored by the mother, PALPATION, or ULTRASONOGRAPHY.
Pathological processes of the OVARY.
The distal segment of the LARGE INTESTINE, between the SIGMOID COLON and the ANAL CANAL.
An abnormal twisting or rotation of a bodily part or member on its axis.
A benign tumor derived from smooth muscle tissue, also known as a fibroid tumor. They rarely occur outside of the UTERUS and the GASTROINTESTINAL TRACT but can occur in the SKIN and SUBCUTANEOUS TISSUE, probably arising from the smooth muscle of small blood vessels in these tissues.
The main artery of the thigh, a continuation of the external iliac artery.
The formation or presence of a blood clot (THROMBUS) within a vein.
General or unspecified injuries involving organs in the abdominal cavity.
An OOCYTE-containing structure in the cortex of the OVARY. The oocyte is enclosed by a layer of GRANULOSA CELLS providing a nourishing microenvironment (FOLLICULAR FLUID). The number and size of follicles vary depending on the age and reproductive state of the female. The growing follicles are divided into five stages: primary, secondary, tertiary, Graafian, and atretic. Follicular growth and steroidogenesis depend on the presence of GONADOTROPINS.
Inflammation of the EPIDIDYMIS. Its clinical features include enlarged epididymis, a swollen SCROTUM; PAIN; PYURIA; and FEVER. It is usually related to infections in the URINARY TRACT, which likely spread to the EPIDIDYMIS through either the VAS DEFERENS or the lymphatics of the SPERMATIC CORD.
The volume of BLOOD passing through the HEART per unit of time. It is usually expressed as liters (volume) per minute so as not to be confused with STROKE VOLUME (volume per beat).
The hemodynamic and electrophysiological action of the right HEART VENTRICLE.
Negative test results in subjects who possess the attribute for which the test is conducted. The labeling of diseased persons as healthy when screening in the detection of disease. (Last, A Dictionary of Epidemiology, 2d ed)
The first branch of the SUBCLAVIAN ARTERY with distribution to muscles of the NECK; VERTEBRAE; SPINAL CORD; CEREBELLUM; and interior of the CEREBRUM.
Tumors or cancer of the UTERUS.
Studies determining the effectiveness or value of processes, personnel, and equipment, or the material on conducting such studies. For drugs and devices, CLINICAL TRIALS AS TOPIC; DRUG EVALUATION; and DRUG EVALUATION, PRECLINICAL are available.
Forced expiratory effort against a closed GLOTTIS.
The venous trunk which receives blood from the lower extremities and from the pelvic and abdominal organs.
Endoscopic examination, therapy or surgery of the interior of the uterus.
A class of statistical methods applicable to a large set of probability distributions used to test for correlation, location, independence, etc. In most nonparametric statistical tests, the original scores or observations are replaced by another variable containing less information. An important class of nonparametric tests employs the ordinal properties of the data. Another class of tests uses information about whether an observation is above or below some fixed value such as the median, and a third class is based on the frequency of the occurrence of runs in the data. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed, p1284; Corsini, Concise Encyclopedia of Psychology, 1987, p764-5)
Echocardiography amplified by the addition of depth to the conventional two-dimensional ECHOCARDIOGRAPHY visualizing only the length and width of the heart. Three-dimensional ultrasound imaging was first described in 1961 but its application to echocardiography did not take place until 1974. (Mayo Clin Proc 1993;68:221-40)
Using fine needles (finer than 22-gauge) to remove tissue or fluid specimens from the living body for examination in the pathology laboratory and for disease diagnosis.
The twisting of the SPERMATIC CORD due to an anatomical abnormality that left the TESTIS mobile and dangling in the SCROTUM. The initial effect of testicular torsion is obstruction of venous return. Depending on the duration and degree of cord rotation, testicular symptoms range from EDEMA to interrupted arterial flow and testicular pain. If blood flow to testis is absent for 4 to 6 h, SPERMATOGENESIS may be permanently lost.
Examination of the portal circulation by the use of X-ray films after injection of radiopaque material.
Radiography of the vascular system of the brain after injection of a contrast medium.
Pregnancy in which the mother and/or FETUS are at greater than normal risk of MORBIDITY or MORTALITY. Causes include inadequate PRENATAL CARE, previous obstetrical history (ABORTION, SPONTANEOUS), pre-existing maternal disease, pregnancy-induced disease (GESTATIONAL HYPERTENSION), and MULTIPLE PREGNANCY, as well as advanced maternal age above 35.
A complication of PREGNANCY, characterized by a complex of symptoms including maternal HYPERTENSION and PROTEINURIA with or without pathological EDEMA. Symptoms may range between mild and severe. Pre-eclampsia usually occurs after the 20th week of gestation, but may develop before this time in the presence of trophoblastic disease.
Diseases of the GALLBLADDER. They generally involve the impairment of BILE flow, GALLSTONES in the BILIARY TRACT, infections, neoplasms, or other diseases.
Branch of the common carotid artery which supplies the exterior of the head, the face, and the greater part of the neck.
Inflammation of a vein associated with a blood clot (THROMBUS).
The middle layer of blood vessel walls, composed principally of thin, cylindrical, smooth muscle cells and elastic tissue. It accounts for the bulk of the wall of most arteries. The smooth muscle cells are arranged in circular layers around the vessel, and the thickness of the coat varies with the size of the vessel.
The joint that is formed by the distal end of the RADIUS, the articular disc of the distal radioulnar joint, and the proximal row of CARPAL BONES; (SCAPHOID BONE; LUNATE BONE; triquetral bone).
Procedures for finding the mathematical function which best describes the relationship between a dependent variable and one or more independent variables. In linear regression (see LINEAR MODELS) the relationship is constrained to be a straight line and LEAST-SQUARES ANALYSIS is used to determine the best fit. In logistic regression (see LOGISTIC MODELS) the dependent variable is qualitative rather than continuously variable and LIKELIHOOD FUNCTIONS are used to find the best relationship. In multiple regression, the dependent variable is considered to depend on more than a single independent variable.
A branch of the celiac artery that distributes to the stomach, pancreas, duodenum, liver, gallbladder, and greater omentum.
Studies which start with the identification of persons with a disease of interest and a control (comparison, referent) group without the disease. The relationship of an attribute to the disease is examined by comparing diseased and non-diseased persons with regard to the frequency or levels of the attribute in each group.
Removal and pathologic examination of specimens in the form of small pieces of tissue from the living body.
A large vessel supplying the whole length of the small intestine except the superior part of the duodenum. It also supplies the cecum and the ascending part of the colon and about half the transverse part of the colon. It arises from the anterior surface of the aorta below the celiac artery at the level of the first lumbar vertebra.
The lower right and left chambers of the heart. The right ventricle pumps venous BLOOD into the LUNGS and the left ventricle pumps oxygenated blood into the systemic arterial circulation.
The two principal arteries supplying the structures of the head and neck. They ascend in the neck, one on each side, and at the level of the upper border of the thyroid cartilage, each divides into two branches, the external (CAROTID ARTERY, EXTERNAL) and internal (CAROTID ARTERY, INTERNAL) carotid arteries.
A spectrum of pathological conditions of impaired blood flow in the brain. They can involve vessels (ARTERIES or VEINS) in the CEREBRUM, the CEREBELLUM, and the BRAIN STEM. Major categories include INTRACRANIAL ARTERIOVENOUS MALFORMATIONS; BRAIN ISCHEMIA; CEREBRAL HEMORRHAGE; and others.
Diseases in any part of the BILIARY TRACT including the BILE DUCTS and the GALLBLADDER.
Injuries caused by impact with a blunt object where there is no penetration of the skin.
The condition of an anatomical structure's being dilated beyond normal dimensions.
Disease having a short and relatively severe course.
Maintenance of blood flow to an organ despite obstruction of a principal vessel. Blood flow is maintained through small vessels.
The short wide vessel arising from the conus arteriosus of the right ventricle and conveying unaerated blood to the lungs.
Blocking of a blood vessel by air bubbles that enter the circulatory system, usually after TRAUMA; surgical procedures, or changes in atmospheric pressure.
The presence of an increased amount of blood in a body part or an organ leading to congestion or engorgement of blood vessels. Hyperemia can be due to increase of blood flow into the area (active or arterial), or due to obstruction of outflow of blood from the area (passive or venous).
A potentially life-threatening condition in which EMBRYO IMPLANTATION occurs outside the cavity of the UTERUS. Most ectopic pregnancies (>96%) occur in the FALLOPIAN TUBES, known as TUBAL PREGNANCY. They can be in other locations, such as UTERINE CERVIX; OVARY; and abdominal cavity (PREGNANCY, ABDOMINAL).
Contractile activity of the MYOCARDIUM.
Pathological processes involving any part of the UTERUS.
Dynamic three-dimensional echocardiography using the added dimension of time to impart the cinematic perception of motion. (Mayo Clin Proc 1993;68:221-40)
The continuation of the axillary artery; it branches into the radial and ulnar arteries.
Developmental abnormalities involving structures of the heart. These defects are present at birth but may be discovered later in life.
The outer margins of the thorax containing SKIN, deep FASCIA; THORACIC VERTEBRAE; RIBS; STERNUM; and MUSCLES.
The period during a surgical operation.
Systematic and thorough inspection of the patient for physical signs of disease or abnormality.
A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.
A prediction of the probable outcome of a disease based on a individual's condition and the usual course of the disease as seen in similar situations.
Impaired venous blood flow or venous return (venous stasis), usually caused by inadequate venous valves. Venous insufficiency often occurs in the legs, and is associated with EDEMA and sometimes with VENOUS STASIS ULCERS at the ankle.
Radiography of the gallbladder after ingestion of a contrast medium.
A procedure in which a laparoscope (LAPAROSCOPES) is inserted through a small incision near the navel to examine the abdominal and pelvic organs in the PERITONEAL CAVITY. If appropriate, biopsy or surgery can be performed during laparoscopy.
Liquid perfluorinated carbon compounds which may or may not contain a hetero atom such as nitrogen, oxygen or sulfur, but do not contain another halogen or hydrogen atom. This concept includes fluorocarbon emulsions and fluorocarbon blood substitutes.
Accumulation of serous fluid between the layers of membrane (tunica vaginalis) covering the TESTIS in the SCROTUM.
Bony cavity that holds the eyeball and its associated tissues and appendages.
The innermost layer of an artery or vein, made up of one layer of endothelial cells and supported by an internal elastic lamina.
Pathological processes or abnormal functions of the PLACENTA.
The movement of the BLOOD as it is pumped through the CARDIOVASCULAR SYSTEM.
Tumors or cancer of the gallbladder.
Fiberoptic endoscopy designed for duodenal observation and cannulation of VATER'S AMPULLA, in order to visualize the pancreatic and biliary duct system by retrograde injection of contrast media. Endoscopic (Vater) papillotomy (SPHINCTEROTOMY, ENDOSCOPIC) may be performed during this procedure.
Statistical models in which the value of a parameter for a given value of a factor is assumed to be equal to a + bx, where a and b are constants. The models predict a linear regression.
Small encapsulated gas bubbles (diameters of micrometers) that can be used as CONTRAST MEDIA, and in other diagnostic and therapeutic applications. Upon exposure to sufficiently intense ultrasound, microbubbles will cavitate, rupture, disappear, release gas content. Such characteristics of the microbubbles can be used to enhance diagnostic tests, dissolve blood clots, and deliver drugs or genes for therapy.
Non-invasive method of vascular imaging and determination of internal anatomy without injection of contrast media or radiation exposure. The technique is used especially in CEREBRAL ANGIOGRAPHY as well as for studies of other vascular structures.
The duct which coveys URINE from the pelvis of the KIDNEY through the URETERS, BLADDER, and URETHRA.

Sperm transport in the human female genital tract and its modulation by oxytocin as assessed by hysterosalpingoscintigraphy, hysterotonography, electrohysterography and Doppler sonography. (1/1926)

The transport function of the uterus and oviducts and its modulation by oxytocin has been examined using hysterosalpingoscintigraphy, recording of intrauterine pressure, electrohysterography and Doppler sonography of the Fallopian tubes. After application to the posterior vaginal fornix, a rapid (within minutes) uptake of the labelled particles into the uterus was observed during the follicular and during the luteal phase of the cycle in all patients. Transport into the oviducts, however, could only be demonstrated during the follicular phase. Transport was directed predominantly into the tube ipsilateral to the ovary bearing the dominant follicle; the contralateral oviduct appeared to be functionally closed. The proportion of patients exhibiting ipsilateral transport did increase concomitant with the increase of the diameter of the dominant follicle. That ipsilateral transport has biological significance is suggested by the observation that the pregnancy rate following spontaneous intercourse or insemination was significantly higher in those women in whom ipsilateral transport could be demonstrated than in those who failed to exhibit lateralization. Oxytocin administration was followed by a dramatic increase in the amount of material transported to the ipsilateral tube, as demonstrated by radionuclide imaging and by Doppler sonography following instillation of ultrasound contrast medium. Continuous recording of intrauterine pressure before and after oxytocin administration did show an increase in basal tonus and amplitude of contractions and a reversal of the pressure gradient from a fundo-cervical to a cervico-fundal direction. These actions of oxytocin were accompanied by an increase in amplitude of potentials recorded by electrohysterography. These data support the view that uterus and Fallopian tubes represent a functional unit that is acting as a peristaltic pump and that the increasing activity of this pump during the follicular phase of the menstrual cycle is reflected by an increased transport into the oviduct ipsilateral to the ovary bearing the dominant follicle. In addition, they strongly suggest a critical role of oxytocin in this process. Failure of this mechanism appears to be a cause of subfertility or infertility, as indicated by the low pregnancy rate following intrauterine insemination or normal intercourse in the presence of patent Fallopian tubes. It may be regarded as a new nosological entity for which we propose the term tubal transport disorder (TTD). Since pregnancy rate of such patients is normal when treated with in-vitro fertilization (IVF), hysterosalpingoscintigraphy seems to be useful for the choice of treatment modalities in patients with patent Fallopian tubes suffering from infertility.  (+info)

Sonographic evidence for the involvement of the utero-ovarian counter-current system in the ovarian control of directed uterine sperm transport. (2/1926)

Sperm transport from the cervix into the tube is an important uterine function within the process of reproduction. This function is exerted by uterine peristalsis and is controlled by the dominant ovarian structure via a cascade of endocrine events. The uterine peristaltic activity involves only the stratum subvasculare of the myometrium, which exhibits a predominantly circular arrangement of muscular fibres that separate at the fundal level into the fibres of the cornua and continue into the circular muscles of the respective tubes. Since spermatozoa are transported preferentially into the tube ipsilateral to the dominant follicle, this asymmetric uterine function may be controlled by the ovary via direct effects utilizing the utero-ovarian counter-current system, in addition to the systemic circulation. To test this possibility the sonographic characteristics of the uterine vascular bed were studied during different phases of the menstrual cycle. Vaginal sonography with the measurement of Doppler flow characteristics of both uterine arteries and of the arterial anastomoses of the uterine and ovarian arteries (junctional vessels) in the cornual region of both sides of the uterus during the menstrual phase of regular-cycling women demonstrated significant lower resistance indices of the junctional vessels ipsilateral to the side of the dominant ovarian structure as compared with the corresponding arteries contralaterally. By the use of the perfusion mode technique, it could be observed that vascular perfusion of the fundal myometrium was significantly increased ipsilateral to the dominant follicle during the late follicular phase of the cycle. These results show that the endocrine control of the dominant ovarian structure over uterine function is not only exerted via the systemic circulation but also directly, most probably utilizing the utero-ovarian counter-current system.  (+info)

CT angiography and Doppler sonography for emergency assessment in acute basilar artery ischemia. (3/1926)

BACKGROUND AND PURPOSE: Both Doppler sonography (DS) and spiral CT angiography (CTA) are noninvasive vascular assessment tools with a high potential for application in acute cerebral ischemia. The usefulness of CTA for vascular diagnosis in acute basilar artery (BA) ischemia has not yet been studied. METHODS: We prospectively studied 19 patients (mean+/-SD age, 58+/-11 years) with clinically suspected acute BA occlusion by DS and CTA. Prior extracranial and transcranial DS was performed in all but 1 patient, with DS 4 hours after CTA. In 6 of 19 patients, we performed digital subtraction angiography. RESULTS: CTA was diagnostic in all but 1 patient. CTA revealed complete BA occlusion in 9 patients and incomplete BA occlusion with some residual flow in 2 patients. A patent BA was shown in 7 patients. Because of severe BA calcification, CTA results were inconclusive in 1 patient. DS was diagnostic in only 7 of 19 patients, indicating certain BA occlusion in 3 patients and BA patency in 4 patients. In an additional 9 patients, the results of DS were inconclusive. DS was false-negative in 2 patients with distal BA occlusion shown by CTA and digital subtraction angiography. In 1 patient with DS performed after CTA, recanalization was demonstrated. In addition to the diagnosis or exclusion of BA occlusion, CTA provided information on the exact site and length of BA occlusion and collateral pathways. In our series, CTA results prompted indication for intra-arterial thrombolysis in 5 patients. CONCLUSIONS: CTA was superior to DS in the assessment of BA patency in patients with the syndrome of acute BA ischemia in terms of feasibility and conclusiveness, particularly in cases with distal BA occlusion. Our study confirmed the usefulness of combined extracranial and transcranial DS in the diagnosis and exclusion of proximal BA occlusion.  (+info)

The tourniquet in total knee arthroplasty. A prospective, randomised study. (4/1926)

We assessed the influence of the use of a tourniquet in total knee arthroplasty in a prospective, randomised study. After satisfying exclusion criteria, we divided 77 patients into two groups, one to undergo surgery with a tourniquet and one without. Both groups were well matched. The mean change in knee flexion in the group that had surgery without a tourniquet was significantly better at one week (p = 0.03) than in the other group, but movement was similar at six weeks and at four months. There was no significant difference in the surgical time, postoperative pain, need for analgesia, the volume collected in the drains, postoperative swelling, and the incidence of wound complications or of deep-venous thrombosis. We conclude that the use of a tourniquet is safe and that current practice can be continued.  (+info)

Quantification of collateral flow in humans: a comparison of angiographic, electrocardiographic and hemodynamic variables. (5/1926)

OBJECTIVES: Evaluation of collateral vascular circulation according to hemodynamic variables and its relation to myocardial ischemia. BACKGROUND: There is limited information regarding the hemodynamic quantification of recruitable collateral vessels. METHODS: Angiography of the donor coronary artery was performed before and during balloon coronary occlusion in 63 patients with one vessel disease. Patients were divided into groups of those with an absence of collateral vessels (group 1, n = 10), those with recruitable collateral vessels (group 2, n = 23) and those with spontaneously visible collateral vessels (group 3, n = 30). During balloon inflation the coronary wedge/aortic pressure ratio (Pw/Pao) was determined as were collateral blood flow velocity variables, using a 0.014" Doppler guide wire. Myocardial ischemia was defined as > or =0.1 mV ST-shift on a 12 lead electrocardiogram at 1 min coronary occlusion. RESULTS: Myocardial ischemia was present in all patients of group 1, in 14 patients of group 2 and in 3 patients of group 3. Recruitable collateral flow without ischemia showed similar hemodynamic values as in group 3 while these values were similar to group 1 in regard to the presence of recruitable collateral vessels showing ischemia. Logistic regression analysis revealed both Pw/Pao and Vi(col) as independent predictors for the function of collateral vessels. CONCLUSIONS: Hemodynamic variables of collateral vascular circulation are better markers of the functional significance of collateral vessels than is coronary angiography. The total collateral blood flow velocity integral and coronary wedge/aortic pressure ratio are good and independent predictors of the function of collateral vessels producing complementary information.  (+info)

Percutaneous revascularization of atherosclerotic obstruction of aortic arch vessels. (6/1926)

OBJECTIVES: To compare stenting of aortic arch vessel obstruction with surgical therapy and to establish recommendations for treatment. BACKGROUND: Though surgery has been considered to be the procedure of choice for subclavian and brachiocephalic obstruction, little work has been done to compare it with stenting. METHODS: Eighteen patients with symptomatic aortic arch vessel stenosis or occlusion were treated with stenting, followed by periodic clinical follow-up and noninvasive arterial Doppler studies. Data were compared with the results as shown in a systematic review of a published series of surgery and stenting procedures which included comparison of technical success, complications, mortality and patency. RESULTS: Primary success in our series was 100% with improvement in mean stenosis from 84+/-11% to 1+/-5% and mean arm systolic blood pressure difference from 44+/-16 mm Hg to 3+/-3 mm Hg. There were no major complications (death, stroke, TIA, stent thrombosis or myocardial infarction). At follow-up (mean 17 months), all patients were asymptomatic with 100% primary patency. Literature review demonstrates equivalent patency and complications in the other published series of stenting. In contrast, there was a similar patency but overall incidence of stroke of 3+/-4% and death of 2+/-2% in the published surgical series. CONCLUSIONS: Subclavian or brachiocephalic artery obstruction can be effectively treated by primary stenting or surgery. Comparison of stenting and the surgical experience demonstrates equal effectiveness but fewer complications and suggests that stenting should be considered as first line therapy for subclavian or brachiocephalic obstruction.  (+info)

The presence of infection-related antiphospholipid antibodies in infective endocarditis determines a major risk factor for embolic events. (7/1926)

OBJECTIVES: The impact of infection-associated antiphospholipid antibodies (APA) on endothelial cell activation, blood coagulation and fibrinolysis was evaluated in patients with infective endocarditis with and without major embolic events. BACKGROUND: An embolic event is a common and severe complication of infective endocarditis. Despite the fact that APAs are known to be associated with infectious diseases, their pathogenic role in infective endocarditis has not been clearly defined. METHODS: The relationship among the occurrence of major embolic events, echocardiographic vegetation size, endothelial cell activation, thrombin generation, fibrinolysis and APA was examined in 91 patients with definite infective endocarditis, including 26 patients with embolic events and 65 control subjects without embolic events. RESULTS: Overall, 14.3% of patients exhibited elevated APA levels. Embolic events occurred more frequently in patients with elevated levels of APA than in patients without (61.5% vs. 23.1%; p = 0.008). Patients with elevated levels of APA showed higher levels of prothrombin-fragment F1 +2 (p = 0.005), plasminogen-activator inhibitor 1 (p = 0.0002), von Willebrand factor (p = 0.002) and lower levels of activated protein C (p = 0.001) than patients with normal levels of APA. Thrombin generation and endothelial cell activation were both positively correlated with levels of APA. The occurrence of elevated APA levels was frequently associated with structural valve abnormalities (p = 0.01) and vegetations >1.3 cm (p = 0.002). CONCLUSIONS: Infection-associated elevated APA levels in patients with infective endocarditis are related to endothelial cell activation, thrombin generation and impairment of fibrinolysis. This may contribute to the increased risk for major embolic events in these patients.  (+info)

Circulatory changes induced by isovolumic increase in red cell mass in fetal lambs. (8/1926)

AIM: To verify whether extra uterine changes in total peripheral vascular resistance and cardiac output, caused by raised haematocrit, occur in fetal life and if they can be documented using conventional ultrasound techniques. METHODS: An exchange transfusion with packed red cells was performed on five fetal lambs at 140 days of gestation (weight 3.44, SD 0.48 kg); three others were used as controls. The haematocrit was raised from 44 +/- 3 to 64 (SD2)%. RESULTS: Body temperature, blood gas, and pH remained within normal limits. Blood viscosity increased from 5.3 (0.3) to 9.6 (1.6) cps. Combined cardiac output fell to 30% of its initial value. The pulsatility index (PI) remained unchanged in the umbilical artery (0.66, SD 0.1) and descending aorta (1.3, SD 0.3). A significant positive correlation was found between haematocrit and PI only in the carotid artery (r = 0.67, p < 0.01). CONCLUSION: In the fetus, as in adults, an increase in blood viscosity is associated with a fall in cardiac output. However, the low resistance and the relative inertia of the placental vascular bed blunt the velocimetric changes that could be induced in the lower body vascular system by an increase in resistance. Such changes were observed only in the carotid artery. These results could be of interest in the Doppler monitoring of human fetuses at risk of an abnormal increase in their haematocrit.  (+info)

TY - JOUR. T1 - Quantitative analysis of fetal pulmonary vasculature by 3-dimensional power Doppler ultrasonography in isolated congenital diaphragmatic hernia. AU - Ruano, Rodrigo. AU - Aubry, Marie Cécile. AU - Barthe, Bruno. AU - Mitanchez, Delphine. AU - Dumez, Yves. AU - Benachi, Alexandra. PY - 2006/12/1. Y1 - 2006/12/1. N2 - Objective: The purpose of this study was to evaluate the potential of 3-dimensional (3D) power Doppler imaging to predict neonatal outcome and pulmonary arterial hypertension (PAH) in congenital diaphragmatic hernia (CDH). Study design: In this prospective observational study, 3D-power Doppler ultrasonography was performed in 21 cases with isolated CDH between 23 and 33 weeks of gestation and in 58 controls between 20 and 40 weeks. Using the same preestablished settings for all cases, power Doppler was applied to each lung, and fetal lung volumes (FLV) were estimated using the rotational technique. The 3D power Doppler histogram was used to determine the vascular ...
Continuous-wave Doppler signal intensity is commonly expected to reflect the severity of mitral regurgitation. Physical principles predict that alignment of the imaging beam, flow velocity, and turbulence can also be important or even dominant determinants of continuous-wave Doppler signal intensity. The reliability of tracking regurgitant severity with continuous-wave Doppler signal intensity was assessed in vitro with varying volume, velocity, turbulence, and beam alignment. The conditions wherein continuous-wave Doppler signal intensity increased with regurgitant volume were specific but poorly predictable combinations of orifice size, flow volume, and perfect beam alignment. Under other conditions flow velocity and turbulence effects dominated, and continuous-wave Doppler signal intensity did not reflect changing regurgitant volume. Continuous-wave Doppler signal intensity-based impressions of regurgitant severity may be unreliable and even misleading under some circumstances.. ...
Power Doppler sonography helps distinguish inflammatory and infectious musculoskeletal fluid collections from those that are noninflammatory, and it may help guide the decision to perform diagnostic aspiration. Power Doppler sonography does not reliably differentiate between inflammatory collections …
Sigma-Aldrich offers abstracts and full-text articles by [Sang Hoon Lee, Jin Suck Suh, Myung Jin Shin, Seong Moon Kim, Namkug Kim, Sang Hyun Suh].
Steven Shinn-Forng Peng, Juh-Herng Lin, Wang-Tso Lee, Po Nien Tsao, Jin Chung Shih, Hon-Man Liu, Yiu-Wah Li, Fon-Jou Hsieh, Kou-Inn Yau Tsou. 
Aims: Metastatic nodes on power Doppler sonography tend to demonstrate high intranodal resistance and abnormal distribution of vascularity within a node. However, in our experience metastatic nodes from papillary carcinoma of the thyroid frequently demonstrate low intranodal resistance and some do not demonstrate the presence of any abnormal vascularity within. We were therefore interested to document these features. Materials and Methods: The grey scale and power Doppler sonograms of 21 metastatic nodes from papillary carcinoma of the thyroid were evaluated. The intranodal distribution of vessels and the intranodal vascular resistance of vessels was assessed and compared with the reported features of metastatic nodes from other head and neck primaries. Results: A majority (17/20, 85%) of metastatic nodes from papillary carcinoma of the thyroid had a maximum resistance index (RI) and pulsatility index (PI) , 0.8 and 1.6, respectively. A majority of the nodes (16/21, 76%) demonstrated abnormal ...
The observations presented in this paper collectively indicate that high-frequency three-dimensional power Doppler ultrasound can be used to assess functional neoangiogenesis in GEM prostate cancer models. The power Doppler signal is proportional to the concentration of blood cells flowing at velocities high enough to be detected by the Doppler system (e.g., , 3 mm/s in this study). The CPD is therefore considered an estimate of the fraction of the tissue volume that is occupied by moving blood ( 23). Tumor CPD data reflect flow in intermediate-sized (e.g., ,100 μm diameter) arterioles and venules and arteriovenous shunts. Vessels imaged by power Doppler are functional in the sense that they support active blood flow. This point is an important aspect of interpreting Doppler images of tumors because as few as 20% of the vessels in a tumor may be perfused at any given instant, and tumor perfusion varies both spatially and temporally ( 19). In addition, unlike many other imaging techniques, ...
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Results The presence of positive Doppler signal itself was associated with elevated ESR, CRP and PLT number but not Hb level at the time of ultrasound examination (ESR, CRP: p,0.0001, WBC: p=0.0116, platelet: p=0.0246). Spearman correlation coefficients showed positive linear association between power Doppler grade and serum levels inflammatory markers (ESR: r=0.21, CRP: r=0.30, WBC: r =0.13, platelet: 0.11, p-value ,0.05) except Hb level. However, multiple linear regression test after adjusting confounding variables showed that only the CRP level among the 5 variables showed a positive relationship with power Doppler grade (p=0.0022). Furthermore, logistic regression test showed one step increase of Doppler grade resulted in 1.3 mg/dL increase of serum CRP level. Post hoc (Scheffe) analysis showed rheumatoid arthritis was the most correlated disease among the rheumatic diseases we included. ...
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Power Doppler mode identified increased synovial microvascular blood flow inside the joint capsule in 20 RA patients (87%), in comparison with in none of the healthy controls (P , 0.0001). Although the median serum VEGF level in RA patients (853 pg/ml) was higher than in healthy controls (638 pg/ml), qualitative Doppler sonographic estimation of the intensity of intra-articular synovial blood flow did not correlate with the actual serum VEGF level of the same patient. ...
One of the main aims of routine antenatal care is to identify mothers or babies at risk of adverse outcomes. Doppler ultrasound uses sound waves to detect the movement of blood in blood vessels. It is used in pregnancy to study blood circulation in the baby, the mothers uterus and the placenta. If abnormal blood circulation is identified, then it is possible that medical interventions might improve outcomes. We set out to assess the value of using Doppler ultrasound of the mothers uterus or placenta (utero-placental Doppler ultrasound) as a screening tool. Other reviews have looked at the use of Doppler ultrasound on the babies vessels (fetal and umbilical Doppler ultrasound). We also choose to look at women with low-risk and high-risk pregnancies, and in their first or second trimesters. This screening offers a potential for benefit, but also a possibility of unnecessary interventions and adverse effects. The review of randomised controlled trials of routine Doppler ultrasound of the uterus ...
TY - JOUR. T1 - Are Doppler ultrasonography parameters symmetric between the right and left kidney?. AU - Ansarin, Khalil. AU - Bavil, Abolhassan Shakeri. AU - Ghabili, Kamyar. AU - Mohajel Shoja, Mohammadali. AU - Khosroshahi, Hamid T.. AU - Hajipour, Babak. AU - Tubbs, R. Shane. AU - Parvizi, Mojtaba. PY - 2010/12/1. Y1 - 2010/12/1. N2 - Background: Among numerous modalities applied for evaluation of kidney diseases, Doppler ultrasonography (DU) provides information about the hemodynamic status of the kidneys. Meanwhile, the variability in DU parameters of the right and left kidney is a matter of controversy. The aim of this study was to determine whether any difference exists between the DU indices of the right and left kidney. Methods: Retrospectively, we collected DU findings of 25 healthy potential renal transplant donors. All donors underwent renal DU and multidetector computed tomographic angiography before donor nephrectomy. DU indices, including peak systolic volume (PSV), resistive ...
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5 MHz water proof probe which is Interchangeable monitors foetus >12 weeks. Read more 5 Best Fetal Doppler in India Reviews and Buying Guide. 2 Do not remove the NI-MH battery pack frequently after initial installation. 5MHz waterproof Probe; Assures accurate FHR detection with clear sound; In-built rechargeable Li-ion battery. The SD3 Vascular Pocket Doppler is compact and versatile: Its portability allows for the effective assessment of both venous and arterial diseases.. SONOTRAX Series Ultrasonic Pocket Doppler User Manual Examining CAUTION 1 If the Doppler is not used for an extended period, take the alkaline/NI-MH batteries out and store them in a cool and dry environment. 2 OR 3 MHz waterproof probe A high performance Fetal Doppler with heart rate Compact design Built-in audio recorder Large LCD display & backlight Accurate FHR detection with clear sound Automatic/ Average / Manual fetal heart rate counting Highly sensitive interchangeable probes. Vcomin Fetal Doppler FD-200B (Item ...
PubMed comprises more than 30 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites.
PDUS signals |1 are rarely seen in normal synovial joints. GSUS synovitis, but not PDUS, may reflect age-related joint changes. PDUS correlated with VEGF, providing further evidence of a central role for VEGF in synovial neo-angiogenesis.
Sartor, Raquel; Mamprim, Maria Jaqueline; Tsunemi, Miriam Harumi. Hemodynamic changes in dogs with diffuse hepatic neoplasia detected by doppler ultrasonography. Ultrasound in Medicine and Biology, v. 39, n. 5, p. S95-S95, 2013. Available at: ,http://hdl.handle.net/11449/141312 ...
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What are Carotid, Aorta, Arterial and Venous Doppler Exams? Carotid, Aorta, Arterial and Venous Doppler exams are all simple, noninvasive tests that use high-frequency sound waves (Ultrasound) and computer-generated graphs to measure the amount and direction of blood flow through your arteries and veins real-time, in a way that simply cannot be obtained using other imaging techniques.
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The various types of pipette-cell interactions observed in this work can be broken down in three categories.. First, the passive membrane properties of the patch membrane contribute a conductance path in proportion to the patch surface area. Although the ratio of the patch surface area to the total cell surface area is small (on the order of 1-4%), so that the associated passive resistance is very high (on the order of 100 GΩ), the current flowing across this resistor is able to significantly affect the firing rate. This is attributable to the exquisite sensitivity of the firing rate on mean cell current near resting conditions, with a more than twofold ratio observed in response to a 1 pA change. We find a larger patch capacitance with K+-containing solutions than with Na+-containing solutions. This may reflect a smaller propensity to form a tight seal in the former case, resulting in a longer period spent in the suction mode, and a larger surface area of the omega-shaped patch. Alternatively, ...
AccessGUDID - I2P24 Doppler Probe (05055679400083)- A stationary probe directs a continuous 4MHz beam of ultrasound waves at blood flowing in the descending aorta. The shift in the frequency of the reflected ultrasound waves caused by the moving blood cells are translated by the CardioQ™ into a real time display of the velocity of the blood against time. Analysis of the waveform provides information on a range of cardiac parameters to be derived.
Hi everyone, Just wondering if anyone else have an article as titled above by Poe Patricia (2012). DOI : 10.1177/154431671203600205.. Visit link ...
Hi! I have my next appt on Monday-- Ill be 11w4d. The dr is planning to do the blood work for all.the.genetic.things and also the babys sex. Heres my question-- will I get an ultrasound before they do the blood draw? Or will they try to find the heartbeat on the doppler? Or will they just do the blood draw without confirming that everythings okay on the inside?
The work described in this report compiles empirical measurements of the intensity of 1.55-µm light reflected from numerous materials prepared with varying surface finishes over a range of incident and detection angles. The data are desired to construct a guide for conducting Photon Doppler Velocimetry measurements, which necessitates a prediction of the intensity of Doppler shifted light that will be reflected from a surface to optimize the measurement. It was found that the intensity of reflected light could be sufficiently explained using the law of reflection coupled with a coefficient of reflection that is specific to the material. It also provides a technique for empirically measuring the latter.
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Ultrasound is used for many different purposes including detection of fetal heartbeats, early detection of vascular disease such as Peripheral Artery Disease, treating pain, and much more.
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ta = chebwin(N,30); % 30 dB Chebychev Spatial Tapper. tb = chebwin(M,40); % 40 dB Chebychev Doppler Taper. phit = 0; thetat = 0; % Target Azimuth and Elevation Angles. fspt = d/lambda*cos(thetat*pi/180)*sin(phit*pi/180); % Target Spatial Frequency. a = exp(1i*2*pi*fspt*(0:N-1)).; % Target Spatial Steering Vector. fd = 0:.5:300; Lfd = length(fd); omega = fd/fr; dopplerfilterbank = linspace(0,300,M+1); % Doppler Filterbank frequencies. omegadopplerbank = dopplerfilterbank/fr; SINRopt_mat = zeros(length(dopplerfilterbank),Lfd); SINRtap_mat = zeros(length(dopplerfilterbank),Lfd); InvRu = inv(Ru); for m=1:length(dopplerfilterbank) bm = exp(1i*2*pi*omegadopplerbank(m)*(0:M-1)).; % Doppler Filter Steering Vector vm = kron(bm,a); gt = kron(tb.*bm,ta.*a); wm = InvRu*vm; %#ok,*MINV, % Eq. (116) wmtap = InvRu*gt; for n=1:Lfd b = exp(1i*2*pi*omega(n)*(0:M-1)).; % Dummy Target Doppler Steering Vector v = kron(b,a); SINRopt_mat(m,n) = wm*v; % Eq. (114) SINRtap_mat(m,n) = abs(wmtap*v)^2/real(wmtap*gt); % ...
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The experienced sonographer employs the Doppler ultrasound audio output as a guide to the best positioning of the transducer and...
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The normal range of Doppler findings in native kidneys has not been studied extensively. This study correlates changes in Doppler resistive index (RI) with age in patients without renal risk factors or renal disease. Young and old patients demonstrat
What this means is that based on morphology, you are already convinced that the lesion is malignant, so you will tend to search and search until you find the RI that verifies your primary ...
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NO MEDICAL treatment can be considered until a proper diagnosis has been established. Ultrasound is one of the most basic and important medical imaging
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Thesis, English, Role Of Grey Scale & Power Doppler Ultrasonography In Evaluation Of Wrist &Finger Joints In Rheumatoid Arthritis Disease for Rashad Yosra Fouad Mohammed
TY - JOUR. T1 - Urinary Cytokines and Renal Doppler Study in Kawasaki Disease. AU - Wu, Jing-Ming. AU - Chiou, Yuan-Yow. AU - Hung, Wen Pin. AU - Chiu, Nan-Tsing. AU - Chen, Mei Ju. AU - Wang, Jieh-Neng. PY - 2010/5/1. Y1 - 2010/5/1. N2 - Objective: To investigate whether renal vasculitis is the sole cause or merely a contributing cause of renal inflammation in Kawasaki disease (KD). Study design: This prospective study in a university medical center in Taiwan enrolled 24 children with KD between June 2004 and November 2005. All patients underwent a technetium-99 m dimercaptosuccinic acid scintigraphy single-photon emission computed tomography scan, the results of which were used to group the patients with KD as with or without renal involvement. Urine samples underwent a cytokine analysis. Renal Doppler ultrasonography was used to evaluate renal vasculitis by measuring the pulsatility index (PI) and resistance index (RI). Results: Ten of the 24 patients (42%) with renal inflammatory foci were ...
BACKGROUND: Reference values for umbilical artery Doppler indices are used clinically to assess fetal wellbeing. However, many studies that have produced reference charts have important methodological limitations, and these result in significant heterogeneity of reported reference ranges. OBJECTIVES: To produce international gestational age-specific centiles for umbilical artery Doppler indices based on longitudinal data and the same rigorous methodology used in the original Fetal Growth Longitudinal Study (FGLS) of the INTERGROWTH-21st Project. STUDY DESIGN: In Phase II of the INTERGROWTH-21st Project (the INTERBIO-21st Study), we prospectively continued enrolling pregnant women according to the same protocol from three of the original populations in Pelotas (Brazil), Nairobi (Kenya) and Oxford (UK) that had participated in FGLS. Women with a singleton pregnancy were recruited at |14 weeks gestation, confirmed by ultrasound measurement of crown-rump length, and then underwent standardized ultrasound
Results We included 28 patients in clinical remission (23 females and 5 males with a mean age (SD) of 51.9 (11.9) years and a disease duration of 108.2 (92.6) months). 71.9% of patients were positive for rheumatoid factor and anti-citrulline antibodies. 75% of patients were on at least one DMARD and 39.3% were on biological treatment. 60.7% of patients had power Doppler signal at baseline and 46.4% met criteria for our definition of active synovitis (synovial hypertrophy ≥2 + Power Doppler signal, Ramirez J et al, Arthritis Research and Therapy 2014). After one year of follow-up, 12 patients (42.9%) did not meet criteria for clinical remission. Of these, 9 had Power Doppler signal in the first ultrasound assessment (p=0.034) and 7 met criteria for defined subclinical synovitis by ultrasound (p=0.291). These patients also had higher levels of ESR (p=0.046) and lower TGF- b1 (p=0.082) at baseline. A logistic regression model found that Power Doppler signal at baseline was the main predictor of ...
A total of 263 patients underwent either periorbital ophthalmosonometry (Doppler ultrasound) or a combination of ophthalmosonometry and supraorbital photoplethysmography (SOPPG) to determine the presence or absence of a hemodynamically significant lesion (occlusion or greater than 50% reduction in lumen diameter). There were 522 vessels studied with Doppler ultrasound and 272 vessels with a combination of the two modalities. The tests were correlated with carotid arteriography to determine their accuracy. Overall accuracy of the Doppler ultrasound examination was 95%. A normal Doppler ultrasound examination was obtained in 367 vessels and arteriography confirmed the absence of a hemodynamically significant lesion in 93%. Of 155 vessels with an abnormal Doppler examination, 149 (96%) were proven on arteriography to have hemodynamically significant lesions. The Doppler ultrasound examination had a high incidence of false-negative examinations (26%) in those vessels that were between 50% and 99% ...
Objectives The aim of this study was to evaluate the relationship between transesophageal ultrasonography-derived renal resistive index values (RRITEE) and a standard translumbar renal ultrasound-derived RRI (RRITLUSG). The effectiveness of each method to predict acute kidney injury (AKI) after cardiac surgery also was compared. Design A prospective observational study. Setting A teaching university hospital. Participants Sixty patients undergoing cardiac surgery. Interventions First, RRI was measured with both methods after anesthesia induction. Second, another measurement was performed with TEE after cardiopulmonary bypass and immediately following the surgery with translumbar ultrasound. To test the correlation between the 2 methods and to plot a Bland-Altman graph, preoperative RRI values measured by both techniques were used. Receiver operating characteristic curves also were plotted to compare the diagnostic values of RRI measured intraoperatively by TEE after cardiopulmonary bypass and by ...
Fetal doppler or fetal heart rate monitor is a handheld device which is used to listen to the babys heartbeat inside the womb of the mother. Fetal doppler works on the principle of Doppler effect, discovered in 1842 by a famous Austrian mathematician and physicist Christian Doppler (1803-53). Doppler discovered that when high-frequency sound waves are reflected from a moving object, their frequency change and this can be analyzed.. Each fetal doppler contains a transducer or a probe which sends out short pulses of ultrasound sound waves into the directed area of the body. When these sound waves are reflected from the babys beating heart, their frequency change. When this echo is received by the fetal doppler, it converts this signal into the babys heartbeat. Normally a speaker or an auxiliary jack of earphones is connected to the doppler through which one can hear the heartbeat.. Fetal doppler and Ultrasound machine used by doctors work on the same doppler effect. The main difference between ...
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TY - JOUR. T1 - Acoustically Active Catheter for Intracardiac Navigation by Color Doppler Ultrasonography. AU - Katayama, Minako. AU - Zarbatany, David. AU - Cha, Stephen S.. AU - Fatemi, Mostafa. AU - Belohlavek, Marek. PY - 2016/11/17. Y1 - 2016/11/17. N2 - Navigation of intracardiac catheters by echocardiography is challenging because of the fundamental limitations of B-mode ultrasonography. We describe a catheter fitted with a piezoelectric crystal, which vibrates and produces an instantaneous marker in color flow Doppler scans. The navigation learning curve was explored first in six pigs. Accuracy and precision of targeting with the navigation marker off (i.e., B-mode imaging) and on were assessed in another six pigs. Paired comparisons confirmed significantly (p = 0.04) shorter mean distances achieved in each pig with the color Doppler marker. Pooled (mean ± standard deviation) distance of the catheter tip from the target crystal was 5.27 ± 1.62 mm by B-mode guidance and 3.66 ± 1.45 ...
TY - JOUR. T1 - Evaluation of Peak Reflux Velocities with Vector Flow Imaging and Spectral Doppler Ultrasound in Varicose Veins. AU - Bechsgaard, Thor. AU - Hansen, Kristoffer Lindskov. AU - Brandt, Andreas. AU - Moshavegh, Ramin. AU - Forman, Julie Lyng. AU - Føgh, Pia. AU - Klitfod, Lotte. AU - Bækgaard, Niels. AU - Lönn, Lars. AU - Jensen, Jørgen Arendt. AU - Nielsen, Michael Bachmann. PY - 2018. Y1 - 2018. N2 - Purpose Spectral Doppler ultrasound (SDUS) is used for quantifying reflux in lower extremity varicose veins. The technique is angle-dependent opposed to the new angle-independent Vector Flow Imaging (VFI) method. The aim of this study was to compare peak reflux velocities obtained with VFI and SDUS in patients with chronic venous disease, i. e., pathological retrograde blood flow caused by incompetent venous valves. Materials and Methods 64 patients with chronic venous disease were scanned with VFI and SDUS in the great or the small saphenous vein, and reflux velocities were ...
Ajou University Medical Information & Media Center 164 Worldcup-ro Yeongtong-gu Suwon 16499 Korea / TEL : 031-219-5312 / FAX : 031-219- ...
Background-Increased renal restive index (RI) measured using Doppler ultrasonography has been shown to correlate with the degree of renal impairment in hypertensive patients; however, the prognostic role of RI in cardiovascular and renal outcomes remains to be elucidated. We investigated the predictive value of RI in essential hypertension.. Methods-A total of 426 essential hypertensive subjects (mean age, 63 years; 50% female) with no prior cardiovascular disease were included in this study. Renal segmental arterial RI was measured by duplex Doppler ultrasonography.. Results-During follow-up (mean, 3.1 years), 55 participants developed the primary composite endpoints including cardiovascular and renal outcomes. In multivariate Cox regression analysis, RI was an independent predictor of worse outcome in total subjects (hazard ratio [HR] 1.69 for 1 standard deviation [SD] increase) as well as in patients with estimated glomerular filtration rate (eGFR) ,60 ml/min/1.73m2 (HR 2.04 for 1 SD ...
The aim of this study was to verify the efficacy of color Doppler ultrasonography for diagnosis of degree and duration of uterine torsion in buffaloes. In Assiu
The new method presented in this study was directly based on the consideration that internal carotid arterial Doppler signals are chaotic signals. This consideration was tested successfully using the nonlinear dynamics tools, like the computation of
This page includes the following topics and synonyms: Doppler Ultrasound, Cardiac Doppler Ultrasound, Pulsed Wave Doppler, Continuous Wave Doppler, Color Flow Imaging, Color Doppler Imaging, Color Doppler Ultrasound.
The flow velocity wave forms generated by Doppler ultrasound examination of the umbilical artery were correlated with feto-placental blood flow and numerically expressed as a ratio between the systolic (A) and the end-diastolic point (B). The technique is non-invasive and simple to perform. A cohort analytical study was done to see whether useful information could be obtained from the A/B ratio that could help in the management of patients with severe proteinuric hypertension. Fifty patients with severe proteinuric hypertension at less than 34 weeks gestation were studied and serial Doppler ultrasound examinations of the umbilical artery were performed. No ultrasound results were made available to the clinician. An A/B ratio of 6 or greater was regarded as increased. Twenty-eight of the patients had an increased A/B ratio; in this group these 14 infants were small for gestational age, 14 developed late decelerations and there were 12 perinatal deaths. The remaining 22 patients had an A/B ratio ...
To evaluate each of the sonographic features on gray-scale and power Doppler sonographic images for differentiating metastatic from reactive lymph nodes, we have conducted multivariate feature analysis to identify the sonographic features that are most predictive of metastasis to the cervical lymph nodes in patients with head and neck cancers. Univariate logistic regression analysis has shown that the six sonographic features assessed show significant correlations with the reactive or metastatic lymph nodes. By using multivariate logistic regression model, however, only three of these sonographic features (ie, the presence or absence of hilar echoes, increases in short axis length of the lymph node, and the presence or absence of hilar blood flow) were identified as predictive of reactive or metastatic lymph nodes. In addition, ROC curve analysis did not support the additional predictive value of power Doppler sonography.. The presence of the hilum, as depicted by sonography, has been reported ...
The growth monitoring of the fetus is a main target of antenatal care. Diagnostic ultrasound has been majorly used to determine fetal wellbeing as an essential part of prenatal care. P-E is identified by an abnormal vascular response to placentation, and is a multisystem disorder of unknown cause specific to pregnancy which influences the health of both mother and fetus. The purpose of the present investigation was to evaluate the sensitivity and specificity of uterine artery Doppler screening i
HUNTLEIGH Sonicaid One fetal doppler - $299.00. New in box Huntleigh Sonicad One fetal doppler Huntleigh Sonicaid One - Rate Display Doppler is a compact fetal Doppler has been designed to easily fit into the your pocket. Its high sensitivity and wide beam coverage enable quick location of the fetal heart from early gestation to full term. Its performance and reliability provide reassurance for both clinician and patient. Innovative and stylishIntegrated probe and cable storageLow running costsPocket ergonomicsLarge fetal heart rate displaySuitable for waterbirths CUSTOMER SATISFACTION IS OUR GOAL HERE AT CJSVAULT 302515177831
Pocket Fetal Doppler BF-500++ (FDA)Pocket Fetal Doppler is a simple, easy-to-use ultrasonic Doppler that allows expectant mothers and health care professionals to retrieve fetal heart rate (FHR) and listen to the sound of the heart beat from the 12th week. Features:LCD displays FHR accurately.Pocket Fetal Doppler has a
A directional Doppler ultrasound cerebrovascular examination was compared with angiographical findings of 152 internal carotid arteries. The Doppler examination was abnormal in 36 of 38 (95%) arteries with occlusion or stenosis greater than 75%. Of 63 arteries with lesser degrees of stenosis, the Doppler examination identified only four. There were no false-positive Doppler examinations. If the decision to perform angiography had been predicated exclusively on the presence of abnormal Doppler findings, 61 of 101 (60%) carotid lesions of potential clinical significance would have been overlooked. While the Doppler ultrasound cerebrovascular examinations is the most useful noninvasive technique available for the evaluation of certain specific categories of patients with cerebrovascular disease, the technique is based on hemodynamic alterations of pressure and flow, and cannot be expected to identify the relatively large number of non-hemodynamically significant carotid lesions that are still ...
Ecografía Doppler (es); Échographie Doppler (fr); Доплерография (ru); Farbkodierte Doppler-Sonografie (de); Siêu âm Doppler (vi); اکوکاردیوگرافی دوپلر (fa); 多普勒超聲 (zh); ドップラー心エコー (ja); USG dopplerowskie (pl); duplexonderzoek (nl); 多普勒超聲 (zh-hant); Ecografía Doppler (gl); Ecografia Doppler (it); Doppler echocardiography (en); الدوبلر الطبي (ar); 多普勒超声 (zh-hans); Ecografia Doppler (ca) tecnica non cruenta e non invasiva quindi facilmente ripetibile utilizzata in medicina per lo studio della situazione anatomica e funzionale dei vasi sanguigni, arteriosi e venosi, e del cuore in tempo reale (it); ultrasound procedure to examine the heart or blood vessels (en); Form der Ultraschalluntersuchung (de); Examen médical. (fr) Ecodoppler, Ecografia doppler, EcoDoppler, Ecocolor Doppler, Ecocolordoppler (it); échographie vasculaire, échographie Doppler vasculaire, échocardiographie-doppler (fr); ...
The data were collected from only 7 of the 20 centers in the RD Heparin study. They were retrospectively selected on the basis of a questionnaire, in which each center declared whether they used color Doppler ultrasound for the diagnosis of DVT. In our laboratory, all study patients were examined with color Doppler ultrasound equipment, but our data ...
In vivo validation of MRI vessel caliber index measurement methods with intravital optical microscopy in a U87 mouse brain tumor model. Neuro Oncol. 2010 Apr; 12(4):341-50 ...
Doppler ultrasonography of the affected extremity with compression should be performed at diagnosis and then used in follow-up to determine resolution of an acute thrombus. Venography or MR angiograph... more
Vascular Ultrasound Lab testing in Buffalo Niagara at the Vein Treatment Center - ACR Accredited Vascular Lab with state of the art General Electric technology ! call 716-839-3638 to schedule
A male, 6 months aged, crossbred dog which was brought to Kocatepe University, Animal Hospital with dysuria complain formed the presented case material. A mild abdominal pain was identified in the clinical examination. Whole blood values and serum biochemistry findings were all within the reference range. In the performed abdominal ultrasonographic examination, inflammatory rashes and wall thickening were identified in the bladder whereas multiple parenchymal cysts with an unknown etiology were identified in the right kidney. Measured resistive index was above the reference values reported in the literature. Presented case results emphasize that the resistive index alone, measured by doppler ultrasonography in multiple renal cyst cases in young dogs, may not be a sufficient diagnostic parameter to assess parenchymal injury. And, in case of parenchymal damage, serum biochemical parameters must be compatible with resistive index ...
Hear your babys sounds and heartbeat from your belly while in the comfort of your home with the Fetal Doppler For Baby Sounds - Baby Heartbeat Monitor!. Introducing the high quality and amazingly affordable Home Doppler! This fetal heart Doppler device allows every mom and dad to listen to their babies within the mothers womb, without having to take a trip to the doctors. It is made of premium materials, durable, lightweight, safe and completely non-invasive. In addition to that, the baby Doppler has many incredibly useful features. It has a clear LCD backlight display and even a volume control so you can see the numbers and hear the sounds your baby makes in utero. It also features three working modes, real-time mode, average mode and the last one is the manual mode. You can choose the one that is the most suitable for your needs.. ...
TY - JOUR. T1 - ARTERIOGRAFIA ULTRASONICA DOPPLER CAROTIDEA CON CONTEMPORANEA VISUALIZZAZIONE DEL FLUSSO SANGUIGNO CON LA TECNICA DEL DUPPLEX SCANNER. PRIME OSSERVAZIONI. AU - Assouad, C.. AU - Balestrini, F.. AU - Bellagamba, G.. PY - 1980. Y1 - 1980. N2 - The authors, after having briefly illustrated the method used for the visualization of the carotid plaques using ultrasound doppler technology in real-time and the analysis of the blood flow with the Angioscan present the first results obtained in their geriatric hospital. In agreement with other literature, they are convinced of the validity of this method for the clearness of the images and for the harmlessness of the this method which permits in time to follow the evolution of the carotid sclerotic disease.. AB - The authors, after having briefly illustrated the method used for the visualization of the carotid plaques using ultrasound doppler technology in real-time and the analysis of the blood flow with the Angioscan present the first ...
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Diabetes mellitus significantly increases the risk for both small and large blood vessel complications e.g. diabetic eye problems and coronary heart disease. Vital organs such as the eye, kidney, heart and brain represent well− recognized preferential targets in patients with diabetes mellitus. The presence of such end−organ damage powerfully influences cardiovascular risk and the benefits of therapeutic interventions. Unfortunately, by the time symptoms develop or events occur as manifestations of target−organ damage, the disease process is already at an advanced stage. Although not traditionally viewed as an end−organ, it is altered structure and function of arterial small blood vessels that acts as the substrate for accelerated disease development and the increased occurrence of vascular events in patients with diabetes mellitus. The ability to detect and monitor sub−clinical damage, representing the cumulative and integrated influence of all risk factors in impairing arterial wall ...
I dont think so, although they might be able to guess that the placenta was rather more ischemic if certain patterns turned up in the waveform -- depending on how the signal bounces back, you might be able to pick up dead areas, but I dont know. Ischaemic areas are hard, because they turn up in a whole lot of pregnancies that go very well. The only thing to say about them is something like perhaps you are more sensitive to ischaemic areas than other women for some reason, which really is just a fancy way of saying we have no idea... but there is no other obvious reason why you get PE! ...
In through-the-wall imaging radar systems, the synthesized images may not provide sufficient range and cross-range resolution for visual classification and identification of the targets. Target movement and target Doppler characteristics can be used to combat resolution limitations and improve objec.... Full description. ...
臺大位居世界頂尖大學之列,為永久珍藏及向國際展現本校豐碩的研究成果及學術能量,圖書館整合機構典藏(NTUR)與學術庫(AH)不同功能平台,成為臺大學術典藏NTU scholars。期能整合研究能量、促進交流合作、保存學術產出、推廣研究成果。. To permanently archive and promote researcher profiles and scholarly works, Library integrates the services of NTU Repository with Academic Hub to form NTU Scholars.. ...
duplex Doppler ultrasound (DUS) | Crystal Research Associates Blog - Independent Equity Research and Analysis from Crystal Research Associates
Doppler ultrasound relies up the shift in frequency and phase that occurs when pressure is exerted upon the ultrasound beam by moving blood and tissue.
Please bring your referral (letter from your doctor) and your Medicare and/or Pension Health care card with you to your appointment. It is important to bring all previous films and reports relating to the region being imaged. It is important that you are on time for your appointment to ensure there is sufficient time available to perform the procedure. Depending on the area to be scanned you may be asked to follow special instructions. Continue to take all your usual medications. You will be given all the relevant information when making your appointment. Vascular Doppler scans usually require no special preparation except Renal Doppler where a 12 hour fast is required.. ...
I am 36 years old. I am 5 feet 10 inches tall and I weigh 77 kg. I am suffering from hypertension. Two months ago my blood pressure (BP) was 120/176. I was admitted in ICU and relieved the next day with BP level of 120/80. I work for 9 hours in a multi task environment. Apart from that, I also have certain personal problems, which I cant describe. I think a lot about my future, career, children and finance. I have undergone tests for diabetes, lipid profile, TMT, Heart doppler and renal doppler test and all were negative. I am on Losartan 50 mg (1 tab daily), Epitril 0.5 mg (half tablet), only if I feel uneasy and Pantocid (daily morning/evening). My problem is that I feel tired when I am stressed and I get a slight chest pain, which initially used to remain overnight but now remains only for an hour or so. I regularly do yoga for half an hour in the morning, but I cant walk for more that 15 minutes. Beyond that I feel tired. I also had acidity and gastric problems. Please advise.
Depicted is a pulse-wave doppler of the descending aorta: The aortic doppler waveform is a good representation of left ventricular systolic function.
Опыт применения методики перфузионной компьютерной томографии головного мозга в сочетании с транскраниальной допплерографией сосудов у пациентов с острым нарушением мозгового кровообращения
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Our sonographers and specialists are highly experienced in all facets of vascular ultrasound imaging. We use high resolution colour Doppler ultrasound.
Our sonographers and specialists are highly experienced in all facets of vascular ultrasound imaging. We use high resolution colour Doppler ultrasound.
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RODERIC (Repositori dObjectes Digitals per a lEnsenyament la Recerca i la Cultura) es el repositorio institucional de la Universitat de València. Se concibe como una ventanilla única para el acceso y la difusión de la producción digital de la Universitat. RODERIC responde al compromiso de la Universitat con el movimiento de acceso abierto al conocimiento adquirido con su adhesión a la Declaración de Berlín (30 Septiembre de 2008).
Transcranial Doppler ultrasonography[edit]. The TCD measures the velocity of blood flow through the major intracranial vessels ... Two depth transorbital doppler (TDTD)[edit]. Innovative method using Two-Depth Transorbital Doppler (TDTD) of intracranial ... Physiosonics, Inc. used transcranial Doppler ultrasound to measure ICP indirectly by assessing the elasticity of the biological ... In place of the stethoscope, a Doppler ultrasound beam measures the blood flow pulsations in intracranial and extracranial ...
Doppler ultrasonography is the preferred diagnostic method. CT and MR angiography may also be employed. Differential diagnoses ...
On Doppler ultrasonography, a slow velocity of ... Ultrasonography (US) is the first-line imaging technique for ...
CHIVA involves Doppler ultrasonography to assess the hemodynamics. Specifically the ultrasound study is to figure out where in ...
"Altered Doppler flow patterns in cirrhosis patients: an overview". Ultrasonography. 35 (1): 3-12. doi:10.14366/usg.15020. ISSN ...
Doppler ultrasonography of the portal vein over 5 seconds, showing peaks of maximal velocity, as well as points of minimal ... Portal vein pulsatility can be measured by doppler ultrasonography. An increased pulsatility may be caused by cirrhosis, as ... On Doppler ultrasonography, the main portal vein (MPV) peak systolic velocity normally ranges between 20 cm/s and 40 cm/s.[7] A ... "Altered Doppler flow patterns in cirrhosis patients: an overview". Ultrasonography. 35 (1): 3-12. doi:10.14366/usg.15020. ISSN ...
They may be monitored over time with repeat Doppler ultrasonography. Rarely, they may result in intermittent bleeding into the ...
Gynecologic ultrasonography is the imaging modality of choice. Use of doppler ultrasound in the diagnosis has been suggested. ... However, doppler flow is not always absent in torsion - the definitive diagnosis is often made in the operating room. Lack of ... Specific flow features on Doppler sonography include: Little or no intra-ovarian venous flow. This is commonly seen in ovarian ... There may occasionally be normal Doppler flow because of the ovary's dual blood supply from both the ovarian arteries and ...
Doppler ultrasonography of deep vein thrombosis in the subsartorial vein. Drawing of the left femoral triangle - shows superior ...
An investigation using ultrasonography and colour Doppler, immunohistochemistry, and diagnostic injections". Knee Surg Sports ... Increased water content and disorganized collagen matrix in tendon lesions may be detected by ultrasonography or magnetic ...
Klingelhöfer, J; Conrad, B; Benecke, R; Frank, B (August 1988). "Transcranial Doppler ultrasonography of carotid-basilar ...
The process should be similar to that used in Doppler ultrasonography. Tissue transluminated by white light has a refraction ... Venous ultrasonography. Radiol Clin North Am 1992;30:879. Dimmeler, S; Assmus, B; Hermann, C; Haendeler, J; Zeiher. AM (1998) ... Detection of deep-vein thrombosis by real-time B-mode ultrasonography. N Engl J Med 1989; 320:342. May, R, Thumer J. The cause ... Darke, SG; Vetrivel, S; Foy, DMA; Smith, S; Baker, S. The comparison of duplex scanning and continuous wave Doppler in the ...
Endoscopic facilities (gastroduodenoscopy, colonoscopy and ERCP) with ultrasonography and Doppler-electrocardiography. · ...
Klingelhöfer J, Conrad B, Benecke R, Frank B (1988). "Transcranial Doppler ultrasonography of carotid-basilar collateral ... Doppler ultrasound CT angiography Stroke Carotid subclavian bypass Stent and balloon angioplasty Endarterectomy Vascular access ... of subclavian steal in infants with coarctation of the aorta and interruption of the aortic arch by color-coded Doppler ...
... transcranial Doppler ultrasonography is used. It is thought that transcranial doppler ultrasonography aimed at residual ... when using transcranial doppler ultrasonography. UEST is also sometimes used in the thrombolytic treatment of myocardial ...
Medical ultrasonography section: Doppler sonography Echocardiography American Society of Echocardiography Christian Doppler 54 ... Circulation 1997;95:151-5 Color M-mode and Doppler-derived tau (τ) as practical advances in clinical diastology - the TauCoMM ... It is calculated from the standard transthoracic Doppler echocardiogram measurements of the right atrial area divided by the ... The same author had developed several Doppler echocardiographic numeric parameters over the last two decades to assess cardiac ...
Ultrasonography can be used to visualize pancreatic pseudocysts or aneurysm of the peripancreatic arteries. Doppler ultrasound ...
Abdominal ultrasonography, preferably with doppler sonography, is useful to detect appendicitis, especially in children. ... CT scan has a sensitivity of 94%, specificity of 95%. Ultrasonography had an overall sensitivity of 86%, a specificity of 81%. ... In some cases (approximately 5%), ultrasonography of the iliac fossa does not reveal any abnormalities despite the presence of ... Terasawa T, Blackmore CC, Bent S, Kohlwes RJ (October 2004). "Systematic review: computed tomography and ultrasonography to ...
"Noninvasive Diagnosis by Doppler Ultrasonography of Fetal Anemia Due to Maternal Red-Cell Alloimmunization". New England ... Thus, if the initial titer is 1:4 and stable but increases at 26 weeks' gestation to 1:8, assessment with MCA Doppler velocity ... evaluation of a Doppler-guided approach". Ultrasound in Obstetrics and Gynecology. 28 (6): 814-20. doi:10.1002/uog.2837. PMID ...
... a new ultrasound technique called color Doppler ultrasonography has been used to assess equine tendon injuries. Color Doppler ... Murata, Daiki; Misumi, Kazuhiro; Fujiki, Makoto (2012). "A Preliminary Study of Diagnostic Color Doppler Ultrasonography in ...
With color Doppler ultrasonography, the vascularity of the undescended testis is poor.[citation needed] A karyotype can confirm ...
Espahbodi, S; Doré, CJ; Humphries, KN; Hughes, SP (2013). "Color Doppler ultrasonography of lumbar artery blood flow in ...
"Three-Dimensional Power Doppler Ultrasonography for Diagnosing Abnormally Invasive Placenta and Quantifying the Risk". ... The work of Collins, Stevenson and Alec (William) Welsh on power Doppler (PD) ultrasound has led to the development of the ... Clark A.R., James J.L., Stevenson G.N., Collins S.L. Understanding abnormal uterine artery Doppler waveforms: A novel ... and they have multiple publications together, notably in 3D power Doppler ultrasound (3D-PD US) methodology and application to ...
Jain S, Allins A, Salim A, Vafa A, Wilson MT, Margulies DR (December 2008). "Noninvasive Doppler ultrasonography for assessing ... uses continuous wave Doppler to measure the Doppler flow profile VTI. It uses anthropometry to calculate aortic and pulmonary ... The blood velocity through the heart causes a Doppler shift in the frequency of the returning ultrasound waves. This shift can ... Real-time, automatic tracing of the Doppler flow profile allows beat-to-beat right-sided and left-sided Q measurements, ...
The severity of the outflow tract defect or pulmonary regurgitation is assessed with Doppler ultrasonography. PPVI is a ...
Currently, Doppler ultrasonography is not considered to significantly contribute to the diagnosis of ectopic pregnancy. A ... Transvaginal ultrasonography has a sensitivity of at least 90% for ectopic pregnancy. The diagnostic ultrasonographic finding ... Specific indications for this procedure include either of the following: No visible IUP on transvaginal ultrasonography with a ... Because of frequent ambiguity on ultrasonography examinations, the following classification is proposed: In women with a ...
Doppler effect Echocardiography Medical imaging Medical ultrasonography Sonography Ultrasound Content initially copied from: ... Although colour Doppler can be used to detect abnormal flows between the chambers of the heart (e.g., persistent (patent) ... When used in conjunction with Doppler ultrasound, microbubbles can measure myocardial flow rate to diagnose valve problems. And ... Hansen, Kristoffer; Nielsen, Michael; Ewertsen, Caroline (2015). "Ultrasonography of the Kidney: A Pictorial Review". ...
Techniques used for pregnancy diagnosis in swine include ultrasonography, amplitude depth machines, and Doppler machines. ... "Real-time ultrasonography and diagnosis of pseudopregnancy in swine". NC State University. Retrieved 2017-10-13. Flowers, WL; ...
Combined with Doppler imaging, nearby blood vessels can also be evaluated. Endoscopic ultrasonography is most commonly used in ... Medical ultrasonography Han, X.-M.; Yang, J.-M.; Xu, L.-H.; Nie, L.-M.; Zhao, Z.-S. (2008-08-01). "Endoscopic ultrasonography ...
... who applied transfontanellar Doppler-ultrasonography to investigate neonatal cerebral circulation. His paper („Thesenpapier") ...
screening tests, X-ray, CT, MRI, PET, bone scan, ultrasonography, mammography, fluoroscopy. ... Transcranial Doppler. *Intravascular. *Gynecologic. *Obstetric. *Echoencephalography. *Abdominal ultrasonography *renal. *renal ...
Transcranial Doppler. *Intravascular. *Gynecologic. *Obstetric. *Echoencephalography. *Abdominal ultrasonography. *Transrectal ...
... the Doppler effect). A laser Doppler velocimeter (LDV), also called a laser Doppler anemometer (LDA), focuses a laser beam into ... Medical ultrasonography. Hidden categories: *CS1 maint: archived copy as title. *All articles with dead external links ... Ultrasonic flowmeters (Doppler, transit time)[edit]. There are two main types of ultrasonic flowmeters: Doppler and transit ... Acoustic Doppler velocimetry[edit]. Acoustic Doppler velocimetry (ADV) is designed to record instantaneous velocity components ...
"TRANSCRANIAL DOPPLER (TCD)". Diakses tanggal 3 April 2015.. *^ Rizaldi Pinzon. "Penggunaan Trans Cranial Doppler untuk Deteksi ... extracranial carotid ultrasonography, dan jika memungkinkan, cerebral angiography. ... Transcranial doppler tidak seakurat kedua alat yang mahal tersebut, tetapi salah satu keuntungannya, yaitu tidak mengandung ... pembuluh darah dan penyakit kardiovaskular yang memiliki Transcranial Doppler,[80] karena alatnya kecil/portabel dan relatif ...
Transcranial Doppler(英语:Transcranial Doppler). *Abdominal ultrasonography(英语:Abdominal ultrasonography) ... Doppler echocardiography(英语:Doppler echocardiography) *TTE(英语:Transthoracic echocardiogram). *TEE(英语:Transesophageal ...
... yet compared to ultrasonography, cholescintigraphy has proven to be superior.[5] The scan is also important to differentiate ...
Transcranial Doppler. *Intravascular. *Gynecologic. *Obstetric. *Echoencephalography. *Abdominal ultrasonography. *Transrectal ...
Transcranial Doppler. *Intravascular. *Gynecologic. *Obstetric. *Echoencephalography. *Abdominal ultrasonography. *Transrectal ...
Transcranial Doppler. *Intravascular. *Gynecologic. *Obstetric. *Echoencephalography. *Abdominal ultrasonography. *Transrectal ...
Cerebral angiography, electroencephalography, transcranial doppler ultrasonography, and cerebral scintigraphy are some of the ...
... transcranial Doppler ultrasonography, and cerebral scintigraphy (technetium Tc 99m exametazime). Cerebral angiography is ...
Computed tomography (CT). Abdominal ultrasonography-not definitive but has been found to be useful. Compression of the left ... Takebayashi S, Ueki T, Ikeda N, Fujikawa A (January 1999). "Diagnosis of the nutcracker syndrome with color Doppler sonography ...
... images to display duplex ultrasonography images. Uses include: *Doppler echocardiography, the use of Doppler ultrasonography to ... The Doppler fetal monitor is commonly referred to simply as a Doppler or fetal Doppler. Doppler fetal monitors provide ... Doppler ultrasonography employs the Doppler effect to assess whether structures (usually blood)[27] are moving towards or away ... Doppler mode: This mode makes use of the Doppler effect in measuring and visualizing blood flow *Color Doppler: Velocity ...
Transcranial Doppler. *Intravascular. *Gynecologic. *Obstetric. *Echoencephalography. *Abdominal ultrasonography. *Transrectal ...
Taleb M, Khuder S, Tinkel J, Khouri SJ (March 2013). "The diagnostic accuracy of Doppler echocardiography in assessment of ... ultrasonography to confirm the presence of portal hypertension, echocardiography/cardiac magnetic resonance imaging for ... Doppler echocardiography can suggest the presence of pulmonary hypertension, but right heart catherization (described below) ... A meta-analysis of Doppler echocardiography for predicting the results of right heart catheterization reported a sensitivity ...
... (THD)[3] uses a specially developed anoscope combined with a Doppler transducer to ... Once the superior rectal arteries are identified through the Doppler, a suture ligation is performed to effectively decrease ... in conjunction with a Doppler flowmeter". Am. J. Gastroenterol. 90 (4): 610-3. PMID 7717320.. .mw-parser-output cite.citation{ ... Abdominal ultrasonography. *Defecography. *Double-contrast barium enema. *Endoanal ultrasound. *Enteroclysis. *Lower ...
... transcranial doppler ultrasonography, or cerebral scintigraphy).. *^ https://priceonomics.com/what-its-like-to-be-declared-dead ...
Although colour Doppler can be used to detect abnormal flows between the chambers of the heart (e.g., persistent (patent) ... Unspecific cortical lesion on CT is confirmed cystic and benign with contrast-enhanced renal ultrasonography using image fusion ... When used in conjunction with Doppler ultrasound, microbubbles can measure myocardial flow rate to diagnose valve problems. And ... Hansen, Kristoffer; Nielsen, Michael; Ewertsen, Caroline (2015). "Ultrasonography of the Kidney: A Pictorial Review". ...
In obstetrics, heart rate can be measured by ultrasonography, such as in this embryo (at bottom left in the sac) of 6 weeks ... It can be detected, however, by doppler.[36][37] Possible points for measuring the heart rate are: *The ventral aspect of the ...
Transcranial Doppler. *Intravascular. *Gynecologic. *Obstetric. *Echoencephalography. *Abdominal ultrasonography. *Transrectal ...
Transcranial Doppler. *Intravascular. *Gynecologic. *Obstetric. *Echoencephalography. *Abdominal ultrasonography. *Transrectal ...
CT has become an important tool in medical imaging to supplement X-rays and medical ultrasonography. It has more recently been ...
Medical ultrasonography uses ultrasound (high-frequency sound waves) to visualize soft tissue structures in the body in real ... Color-Flow Doppler Ultrasound measures the severity of peripheral vascular disease and is used by Cardiology for dynamic ... The first ultrasound images were static and two dimensional (2D), but with modern-day ultrasonography 3D reconstructions can be ...
Transcranial Doppler. *Intravascular. *Gynecologic. *Obstetric. *Echoencephalography. *Abdominal ultrasonography. *Transrectal ...
Main article: Medical ultrasonography. Medical ultrasonography uses ultrasound (high-frequency sound waves) to visualize soft ... Color-flow Doppler ultrasound measures the severity of peripheral vascular disease and is used by cardiologists for dynamic ... The first ultrasound images were static and two-dimensional (2D), but with modern ultrasonography, 3D reconstructions can be ...
Women experiencing a complicated pregnancy may have a test called a Doppler ultrasound to look at the blood flow to their ... A review looked at performing Doppler ultrasounds on all women even if they were at 'low-risk' of having complications.[19] The ... "Fetal and umbilical Doppler ultrasound in normal pregnancy". The Cochrane Database of Systematic Reviews. 4: CD001450. doi ... review found that routine Doppler ultrasounds may have reduced preventable numbers of baby deaths but the evidence was not ...
Doppler ultrasonography of the uterine arteries to investigate for signs of inadequate placental perfusion. This test has a ...
... or as an image using color Doppler (directional Doppler) or power Doppler (non directional Doppler). This Doppler shift falls ... Doppler ultrasonography is medical ultrasonography that employs the Doppler effect to generate imaging of the movement of ... Doppler ultrasonography is widely used in renal ultrasonography. Renal vessels are easily depicted by the color Doppler ... The Doppler fetal monitor is commonly referred to simply as a Doppler or fetal Doppler. Doppler fetal monitors provide ...
Definition of Doppler ultrasonography. Provided by Stedmans medical dictionary and Drugs.com. Includes medical terms and ... Doppler ultrasonography. Pronunciation: dopler. Definition: application of the Doppler effect in ultrasound to detect movement ...
Doppler ultrasonography examines the blood flow in the major arteries and veins in the arms and legs with the use of ultrasound ... Doppler ultrasonography examines the blood flow in the major arteries and veins in the arms and legs with the use of ultrasound ... Doppler ultrasonography of an extremity. URL of this page: //medlineplus.gov/ency/imagepages/9279.htm Doppler ultrasonography ...
Ultrasonography (US) generally reveals a hypoechoic solid mass within the testicular parenchyma. We describe a patient with ... Doppler US examination aids in the diagnosis by demonstrating the vascular nature of the tumor. ... The gray-scale and Doppler US appearance of an intratesticular AVM and the differential diagnosis have been presented. Based on ... Testicular Arteriovenous Malformation: Gray-Scale and Color Doppler Ultrasonography Features. Fatih Gulsen. ,1 Ismail Mihmanli ...
Duplex Doppler Ultrasonography. On duplex Doppler ultrasonography, features suggestive of hepatic cirrhosis with portal ... Power Doppler sonogram through the spleen shows varices at the hilum of an enlarged spleen. The final diagnosis was hepatitis C ... Duplex spectral Doppler sonogram of the portal vein (same patient as in the previous image) shows a bidirectional flow within ... Limitations of ultrasonography include the fact that the reproducibility of data is problematic and that many variables, such ...
Preoperative transvaginal color Doppler ultrasonography has been used to assess the possibility of malignancy in ovarian masses ... What is the role of Doppler ultrasonography in the workup of borderline ovarian cancer?) and What is the role of Doppler ... Preoperative transvaginal color Doppler ultrasonography has been used to assess the possibility of malignancy in ovarian masses ... What is the role of Doppler ultrasonography in the workup of borderline ovarian cancer?. Updated: Mar 18, 2019 ...
In this scenario, thyroid color-flow doppler ultrasonography (US Doppler) presents a viable alternative, as a widely available ... "Graves Disease Thyroid Color-Flow Doppler Ultrasonography Assessment: Review Article" written by Thiago Adler Ralho Rodrigues ... Role of Color Doppler Ultrasonography in Differentiation of Graves Disease from Thyroiditis: A Prospective Study. World ... Role of Color Doppler Ultrasonography in Differentiation of Graves Disease from Thyroiditis: A Prospective Study ...
Hadani M, Bruk B, Ram Z, Knoller N, Spiegelmann R, Segal E (1999) Application of transcranial Doppler ultrasonography for the ... Powers AD, Graeber MC, Smith RR (1989) Transcranial Doppler ultrasonography in the determination of brain death. Neurosurgery ... Can transcranial Doppler ultrasonography confirm the diagnosis of brain death? Intensive Care Med 31:S1-S174CrossRefGoogle ... can be visualized by transcranial Doppler ultrasonography (TCD). The aim of this study was to assess the validity of TCD in ...
During Transcranial Doppler (TCD) ultrasound, a hand-held wand called a transducer is moved over the skin near your temple. The ... During Transcranial Doppler (TCD) ultrasound, a hand-held wand called a transducer is moved over the skin near your temple. The ... Transcranial Doppler (TCD) does not require preparation on the part of the patient. You will be ... ...
Doppler" by people in Harvard Catalyst Profiles by year, and whether "Ultrasonography, Doppler" was a major or minor topic of ... "Ultrasonography, Doppler" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH (Medical ... Ultrasonography applying the Doppler effect, with frequency-shifted ultrasound reflections produced by moving targets (usually ... Below are the most recent publications written about "Ultrasonography, Doppler" by people in Profiles. ...
Transcranial Doppler Ultrasonography (TCD) to SCD patients can be a valuable service that results in a significant decrease of ... Transcranial Doppler Ultrasonography (TCD) to SCD patients can be a valuable service that results in a significant decrease of ... Transcranial Doppler Ultrasonography (TCD) is a more effective, harmless and non-invasive test, which allows dynamic monitoring ... Transcranial Doppler Ultrasonography to Prevent Cerebrovascular Accident in Children with Sickle-Cell Disease ...
The Doppler gate of 4. ±. 7. mm length was placed within the vessel. The angle between the Doppler beam and the long axis to ... Color Pulsed-Wave Doppler Ultrasonography. Fourteen camelids (7 fertile and 7 infertile) were used in this study. In addition ... Color pulsed-wave Doppler ultrasonography was used to measure peak systolic velocity (PSV), end diastolic velocity (EDV), and ... Using pulsed-wave Doppler ultrasonography, there were no vascular alterations (e.g., varicoceles, varicosities) visualized ...
Evaluation of AgeRelated White Matter Changes Using Transcranial Doppler Ultrasonography. Posted on August 31, 2011. by RSS ... Home » Blog » News » Evaluation of AgeRelated White Matter Changes Using Transcranial Doppler Ultrasonography ...
... Dec 7, 2008 - ... transcranial Doppler ultrasonography (TCD), along with regular transfusions for children found to be at high risk, reduced ...
... ... task while blood flow velocities in both middle cerebral arteries were measured with transcranial Doppler ultrasonography (TCD ...
Pulsed multigated Doppler ultrasonography in the diagnosis of carotid artery disease.. H Sillesen, K R Bitsch, T Schroeder, H J ... Pulsed multigated Doppler ultrasonography in the diagnosis of carotid artery disease.. H Sillesen, K R Bitsch, T Schroeder, H J ... Pulsed multigated Doppler ultrasonography in the diagnosis of carotid artery disease.. H Sillesen, K R Bitsch, T Schroeder, H J ... Pulsed multigated Doppler ultrasonography allows identification of even minor degrees of stenosis of the carotid artery and ...
Combined Use of Coronary MDCTA, Coronary Doppler Ultrasonography and PET Perfusion in Diagnosis of Coronary Artery Disease. ... Combined Use of Coronary MDCTA, Coronary Doppler Ultrasonography and PET Perfusion in Diagnosing Coronary Artery Disease ( ... such as PET perfusion or coronary doppler ultrasonography, one can assume that even the PPV may be as high as 95 %. Despite ... such as PET perfusion or coronary doppler ultrasonography, one can assume that even the PPV may be as high as 95 %. Despite ...
To evaluate changes in retrobulbar blood flow by using color Doppler ultrasonography (CDUS) after intravitreal ranibizumab ... Despite the fact that studying ocular blood flow is very complicated, color Doppler ultrasonography (CDUS) is a noninvasive ... To evaluate changes in retrobulbar blood flow by using color Doppler ultrasonography (CDUS) after intravitreal ranibizumab ... To evaluate changes in retrobulbar blood flow by using color Doppler ultrasonography (CDUS) after intravitreal ranibizumab ...
To confirm intracranial circulatory arrest (CA) with Doppler sonography, typical flow patterns must be recorded in bilateral ... transcranial Doppler sonography (TCD) has found its place in these circumstances and fulfils most of the criteria of an ideal ...
1999) Power Doppler ultrasonography in metacarpophalangeal joint synovitis [abstract]. Ann Rheum Dis EULAR suppl:29, . ... During the editorial evaluation of this article an observation of Doppler ultrasonography in Raynauds syndrome has been ... Within the Doppler frame box, blood flow is visualised as colored areas by Color-Doppler technique. ... power/colour Doppler), and indices of the intra- and extrasynovial arterial flow (spectral Doppler). The flow pattern was ...
... a first stroke by transfusions in children with sickle cell anemia and abnormal results on transcranial doppler ultrasonography ... a first stroke by transfusions in children with sickle cell anemia and abnormal results on transcranial doppler ultrasonography ...
Power Doppler ultrasonography was performed for carrageenin-induced arthritic left knee and control right knee of 13 rabbits, ... To validate contrast-enhanced power Doppler ultrasonography (PD US) for the evaluation of synovial vascularity in an arthritic ... Quantitative assessment of synovial vascularity using contrast-enhanced power Doppler ultrasonography: correlation with ... MVDs correlated with color pixel areas of contrast-enhanced power Doppler imaging in arthritic knees. In MR grading of ...
Superiority of SDAI over DAS-28 in assessment of remission in rheumatoid arthritis patients using power Doppler ultrasonography ... US examination was performed in mode B and power Doppler (PD) in 42 joints. ...
Doppler signal in hyperresponders during in vitro fertilization treatment using three-dimensional power Doppler ultrasonography ... power Doppler ultrasound (US). The 3-D power Doppler ultrasonographic indexes were used to quantify ovarian stromal blood flow ... Next Document: Quantitative three-dimensional power Doppler sonography for assessment of the fetal renal blood flow.... ... Ovary / blood supply*, drug effects, ultrasonography*. Prospective Studies. Regional Blood Flow. Statistics, Nonparametric. ...
Transcranial Doppler ultrasonography offers non-quantitative measurements of CBF. Changes in global CBF can be monitored ... 1997) Correlation between transcranial Doppler ultrasonography and regional cerebral blood flow in experimental intracranial ... Preliminary experience of the estimation of cerebral perfusion pressure using transcranial Doppler ultrasonography ... Preliminary experience of the estimation of cerebral perfusion pressure using transcranial Doppler ultrasonography ...
Spectral or pulse Doppler is a useful non-invasive method for the early diagnosis of subfertility problems in the male, ... ContentsDoppler ultrasonography is an important tool in the andrological evaluation in humans; however, this method is not so ... ContentsDoppler ultrasonography is an important tool in the andrological evaluation in humans; however, this method is not so ... Spectral or pulse Doppler is a useful non-invasive method for the early diagnosis of subfertility problems in the male, ...
By duplex Doppler ultrasonography ocular and orbital vessels were identify and blood flow measurements, including peak systolic ... A-mode, two-dimensional and Doppler ultrasonography have been used to characterize the ocular biometry, ocular structures and ... However, in the authors knowledge the ocular examination by two-dimensional and Doppler imaging ultrasonography has been ... Two-Dimensional and Duplex Doppler Ultrasonography of the Eye in Normal Rabbits ...
Doppler ultrasonography (DUS) measurements of systolic and diastolic vessel diameter and blood velocity were conducted on 16 ... Evidence for non-Newtonian behavior of intracranial blood flow from Doppler ultrasonography measurements. ... Doppler ultrasound Non-Newtonian flow Blood viscosity Intracranial hemodynamics Blood rheology Abbreviations. AComA. anterior ... Takeda Y (1999) Ultrasonic Doppler method for velocity profile measurement in fluid dynamics and fluid engineering. Exp Fluids ...
Power Doppler ultrasonography and synovitis: correlating ultrasound imaging with histopathological findings and evaluating the ... Assessing the intra- and inter-reader reliability of dynamic ultrasound images in power Doppler ultrasonography ... Assessing the intra- and inter-reader reliability of dynamic ultrasound images in power Doppler ultrasonography ...
Noninvasive detection of thrombosis of the deep veins of the legs: comparison of Doppler ultrasonography and impedance ... Noninvasive detection of thrombosis of the deep veins of the legs: comparison of Doppler ultrasonography and impedance ... Noninvasive detection of thrombosis of the deep veins of the legs: comparison of Doppler ultrasonography and impedance ... comparison of Doppler ultrasonography and impedance plethysmography with venography. J Am Osteopath Assoc 1982;81(8):535. doi: ...
  • The gray-scale and Doppler US appearance of an intratesticular AVM and the differential diagnosis have been presented. (hindawi.com)
  • Doppler US examination aids in the diagnosis by demonstrating the vascular nature of the tumor. (hindawi.com)
  • Pulsed multigated Doppler ultrasonography in the diagnosis of carotid artery disease. (ahajournals.org)
  • Spectral or pulse Doppler is a useful non-invasive method for the early diagnosis of subfertility problems in the male, especially those triggered by vascular disturbance. (ovid.com)
  • Carotid artery stenosis: gray-scale and Doppler US diagnosis--Society of Radiologists in Ultrasound Consensus Conference. (semanticscholar.org)
  • This article also discusses the usefulness of color Doppler ultrasonography for the diagnosis of internal jugular venous ectasia. (oup.com)
  • The aim of this study was to verify the efficacy of color Doppler ultrasonography for diagnosis of degree and duration of uterine torsion in buffaloes. (sparrho.com)
  • In conclusion, depicting blood flow within the middle uterine artery using color Doppler sonography could be helpful in correct diagnosis of duration and degree of uterine torsion and concurrently predicting the viability of the fetus and dam. (sparrho.com)
  • Although history and examination may suggest the diagnosis, testicular torsion can be reliably confirmed only with color Doppler ultrasonography, which must be obtained immediately. (aafp.org)
  • the lack of color Doppler flow may assist in the diagnosis. (medicalechography.com)
  • Trans cranial Doppler (TCD) Ultrasonography is the cutting edge in technology used in diagnosis and treatment of Stroke (Paralysis) . (shalby.org)
  • It is a form of ultrasonography and is used in the diagnosis of Stroke along with the CT Scanner, MRI and MRA . (shalby.org)
  • AJOU Open Repository: Renal Doppler ultrasonography in the diagnosis of nutcracker syndrome. (ajou.ac.kr)
  • Objectives To assess the findings of colour-flow Doppler ultrasonography (DUS) in the diagnosis of vesico-ureteric reflux (VUR), as an alternative to the primary diagnostic tool, voiding cysto-urethrography (VCUG). (sdu.edu.tr)
  • 1 A distalis femurvég orientációjának hatása a tengelykorrekcióra a tibia magas záró ékosteotomiája után Rövid-középtávú radiológiai vizsgálat The effect of the orientation of the distal femur on the correction of axis after closing-wedge high tibial osteotomy Short-medium term radiological assessment Differential diagnosis of malignant cervical lymph nodes at real-time ultrasonographic elastography and Doppler ultrasonography Akut carpalis alagút szindróma hyperventilatio okozta tetania következtében dr. (docplayer.hu)
  • Despite the fact that studying ocular blood flow is very complicated, color Doppler ultrasonography (CDUS) is a noninvasive diagnostic method that can give information about flow velocities of retrobulbar blood vessels and vascular downstream resistance. (healio.com)
  • Ultrasonography is a safe noninvasive way to evaluate the intraocular and retrobulbar tissue of opaque eyes. (vin.com)
  • Elbaum D, Wolfson P, Hedlund D, Smith CR, Braunstein D, Haspel L, Litchfield R, Sallen M, Siegel M. Noninvasive detection of thrombosis of the deep veins of the legs: comparison of Doppler ultrasonography and impedance plethysmography with venography. (jaoa.org)
  • Purpose: To evaluate the use of noninvasive quantified contrast-enhanced power Doppler ultrasonography as a surrogate in the estimation of tumor hypoxia measured by invasive pO2 histography in canine tumors. (uzh.ch)
  • Conclusion: These analyses show that quantified contrast-enhanced power Doppler ultrasonography does not represent a noninvasive indirect method to assess tumor hypoxia measured by invasive pO2 histography. (uzh.ch)
  • 1. Application of the Doppler effect in ultrasound to detect movement of scatterers (usually red blood cells) by the analysis of the change in frequency of the returning echoes.In many instances, ultrasound has supplanted x-radiography as the imaging method of choice, because it poses no risk to patients, is noninvasive, and of moderate cost. (lexic.us)
  • Noninvasive color Doppler sonography of uterine blood flow throughout pregnancy in sheep and goats. (sparrho.com)
  • Penile Doppler ultrasonography is a high-performing, noninvasive or minimally-invasive imaging modality that allows the depiction of the normal anatomy and macroscopic pathologic changes in real time. (bvsalud.org)
  • 1 Since the 1990s, transcranial Doppler sonography (TCD) has found its place in these circumstances and fulfils most of the criteria of an 'ideal test' in confirming BD. (bmj.com)
  • To confirm intracranial circulatory arrest (CA) with Doppler sonography, typical flow patterns must be recorded in bilateral intracranial and extracranial brain-supplying arteries. (bmj.com)
  • Quantitative three-dimensional power Doppler sonography for assessment of the fetal renal blood flow. (biomedsearch.com)
  • The terms Doppler ultrasound and Doppler sonography have been accepted to apply to both pulsed and continuous Doppler systems, despite the different mechanisms by which the velocity is measured. (wikipedia.org)
  • Doppler sonography is a technique which uses reflected sound waves to measure movements such as blood flow and heartbeat. (tidkehospital.com)
  • Transrectal Doppler sonography of uterine blood flow in ewes during pregnancy. (sparrho.com)
  • Study of Peripheral Enthesitis With Ultra Sonography Doppler in Spondyloarthropathies Treated With Infliximab. (springer.com)
  • Color Doppler sonography is a recently introduced method which makes it possible to evaluate intra- and perilesional vascularization and to perform a hemodynamic study of the area being explored. (reumatismo.org)
  • The color Doppler sonography can provide a useful adjunct to conventional ultrasound, increasing diagnostic accuracy in submandibular- parotid masses and to analyze physiologic changes that occur during salivary stimulation in normal subjects and the flow alterations that occur in diseased glands of SS patients. (reumatismo.org)
  • Also used is Doppler sonography which detects the heartbeat of the fetus. (wikipedia.org)
  • Doppler sonography can be used to evaluate the pulsations in the fetal heart and bloods vessels for signs of abnormalities. (wikipedia.org)
  • Fabregas, N. / Luteolysis in donkey evaluated by color Doppler ultrasonography . (uab.cat)
  • All subjects performed a 2-min sequential thumb-to-finger opposition task while blood flow velocities in both middle cerebral arteries were measured with transcranial Doppler ultrasonography (TCD). (nih.gov)
  • It is used in for example: Carotid ultrasonography Ultrasonography of deep venous thrombosis Ultrasonography of chronic venous insufficiency of the legs Duplex evaluation is usually done prior to any invasive testing or surgical procedure. (wikipedia.org)
  • OBJECTIVE To evaluate ultrasonographic methods, including the Doppler technique, as measures of synovial inflammation in finger joints of patients with rheumatoid arthritis. (bmj.com)
  • The 3-D power Doppler ultrasonographic indexes were used to quantify ovarian stromal blood flow and vascularization in hyperresponders. (biomedsearch.com)
  • The purpose of this study was to describe the normal ultrasonographic appearance of rabbits eyes using two-dimensional ultrasound, perform biometric evaluation and study the orbital and ocular vasculature using duplex Doppler ultrasonography. (vin.com)
  • Microvascular ultrasonographic imaging is the most recent and unique Doppler ultrasound technique. (bvsalud.org)
  • To evaluate the accuracy of a pulsed multigated Doppler system, 128 carotid arteries were examined. (ahajournals.org)
  • Pulsed multigated Doppler ultrasonography allows identification of even minor degrees of stenosis of the carotid artery and provides an alternative to duplex scanning. (ahajournals.org)
  • Preoperative transcranial and carotid Doppler study in coronary artery bypass graft patients. (semanticscholar.org)
  • 4-Dimensionally Guided 3-Dimensional Color-Doppler Ultrasonography Quantifies Carotid Artery Stenosis With High Reproducibility and Accuracy. (semanticscholar.org)
  • OBJECTIVES The purpose was to analyze the agreement and binary accuracy of the degree of internal carotid artery stenosis (ICAS) as determined by 4-dimensionally (4D) real-time gray-scale guided 3-dimensional (3D) color-Doppler ultrasonography (3DC-US) (4D/3DC-US) compared with catheter angiography (CA) and duplex ultrasonography (DUS). (semanticscholar.org)
  • Progression of carotid stenosis detected by duplex ultrasonography predicts adverse outcomes in cardiovascular high-risk patients. (semanticscholar.org)
  • Carotid stenosis measurement on colour Doppler ultrasound: agreement of ECST, NASCET and CCA methods applied to ultrasound with intra-arterial angiographic stenosis measurement. (semanticscholar.org)
  • The distance from internal carotid artery (ICA) to cervical vertebra (CV) (D(ICA-CV)) at the upper cervical level was measured by longitudinal ultrasonography. (elsevier.com)
  • Colour Doppler ultrasonography was used to differentiate abscess from other pathology and to detect carotid sheath invasion. (elsevier.com)
  • It is preferable to periorbital Doppler ultrasonography and oculoplethysmography for evaluating patients with carotid artery transient ischemic attacks and is useful for following an abnormality over time. (merckmanuals.com)
  • The aim of this study was to assess vascular changes and blood flow abnormalities in the common carotid arteries of patients with head and neck cancers after external radiotherapy, using color Doppler ultrasonography. (e-ultrasonography.org)
  • In order to study the acute effects of irradiation on common carotid blood flow and arterial diameter changes, color Doppler ultrasonography parameters such as peak systolic velocity, end diastolic velocity, mean velocity, systolic-to-diastolic velocity (S/D) ratio, pulsatility index (PI), resistive index (RI), and instantaneous diameter changes were evaluated before and after external radiotherapy. (e-ultrasonography.org)
  • RESEARCH DESIGN AND METHODS -We measured BFVs in 28 type 2 diabetic and 22 control subjects (aged 62.3 ± 7.2 years) using transcranial Doppler ultrasound during baseline, hyperventilation, and CO 2 rebreathing. (diabetesjournals.org)
  • Xenon blood flow ( 5 ) and transcranial Doppler ultrasound (TCD) studies indicate that patients with type 2 diabetes have impaired cerebrovascular reactivity to hypercapnia ( 6 , 7 ). (diabetesjournals.org)
  • What is a transcranial doppler ultrasound? (clevelandclinic.org)
  • Purkayastha S, Sorond F. Transcranial Doppler Ultrasound: Technique and Application. (clevelandclinic.org)
  • To explore changes to expected, age-related transcranial Doppler ultrasound variables during pediatric extracorporeal membrane oxygenation. (duke.edu)
  • Participants underwent daily transcranial Doppler ultrasound measurement of bilateral middle cerebral artery flow velocities. (duke.edu)
  • abstract = "Objective: This study was conducted to determine the capability of colour Doppler ultrasonography (CDU) in evaluating retropharyngeal abscess in children. (elsevier.com)
  • METHODS Ultrasonography was performed with a high frequency transducer (13 MHz). (bmj.com)
  • Material and Methods: The investigation was performed on 20 ultrasonography exams of facial vessels through linear and endocavitary transducers. (uv.es)
  • Ultrasonography may be useful in monitoring the synovial inflammation in rheumatoid arthritis. (bmj.com)
  • [ 25 ] Ultrasonography of the upper abdomen may be indicated in patients with esophageal varices, especially if biliary obstruction or liver cancer is suspected. (medscape.com)
  • Transcranial Doppler Ultrasonography (TCD) to SCD patients can be a valuable service that results in a significant decrease of first stroke rates. (scirp.org)
  • To evaluate changes in retrobulbar blood flow by using color Doppler ultrasonography (CDUS) after intravitreal ranibizumab injection in patients with neovascular age-related macular degeneration (AMD). (healio.com)
  • Ultrasonography has proved to be valuable in the morphological and structural assessment of soft tissue in patients with arthritis. (bmj.com)
  • During ovarian stimulation, on the day of human chorionic gonadotropin (HCG) administration, patients underwent hormonal (serum E2), ovarian volume and 3-D power Doppler (ovarian stroma flow) evaluation. (biomedsearch.com)
  • To compare the power Doppler ultrasonography (PDUS) pictures of peripheral entheses in patients with psoriatic arthritis (PsA) and fibromyalgia (FM). (jrheum.org)
  • Twenty eyes of 19 patients who underwent recession or resection surgery on two horizontal rectus muscles in 1 eye were examined using color Doppler ultrasonography preoperatively and 1 week and 1 month postoperatively. (eurekamag.com)
  • High-frequency (grey-scale) ultrasonography (HFUS) can reproducibly delineate synovial thickening in small joints of the hands in patients with active RA, but the analysis of such images does not necessarily demonstrate a clear relationship with clinical assessments of disease activity 4 . (jrheum.org)
  • Patients who have risk factors for DVT or pulmonary embolism (PE), and in whom a clinician suspects DVT or PE, should have workups that include, but are not necessarily limited to, bedside compression ultrasonography. (medscape.com)
  • Thus, it is important to have a diagnostic method for the valuation of this type of patients which be easy, quick, reliable and of relative low cost, so we have found that the Doppler´s method has all of the above characteristics, being also a noninvassive and multiplanar method, which has a diagnostic accuracy of 90% aprox. (neurootology.org)
  • 10] C. J. Lavie, K. Hebert and M. Cassidy, "Prevalence and Severity of Doppler-Detected Valvular Regurgitation and Estimation of Right-Sided Cardiac Pressure in Patients with Normal Two-Dimensional Echocardiograms," Chest, Vol. 103, No. 1, 1993, pp. 226-231. (scirp.org)
  • Doppler ultrasonography in 5950 patients who had hypertension Conclusions and clinical features suggestive of renal-artery stenosis. (internetpdfarticles.com)
  • The objectives of this study were to determine the statistical relevance of quantitative and qualitative evaluation criteria of hepatic masses using triphasic CT, B-mode, color flow and power Doppler ultrasonography, and to compare the diagnostic accuracy of these modalities for predicting mass type classified by histopathology obtained from ultrasound guided tru- cut biopsies, surgical resection, or necropsy. (avmi.net)
  • Through the Doppler´s Ultrasonography of head and neck (USD), the modern physician can help himself to complement his better Diagnostic, correlating all the background, clinical description, vestibular results (exploration of vestibuloespinal, retinalocular and vestibuloocular systems of the patient suffering from vertigo. (neurootology.org)
  • The diagnostic tools for the assessment of DICAs include Doppler ultrasonography, computed tomography angiography (CTA), magnetic resonance angiography (MRA) and digital subtraction angiography (DSA), and although DSA remains the gold standard, Doppler ultrasonography is a convenient method that provides useful data for the morphological evaluation of DICAs. (medsci.org)
  • Doppler ultrasonography is the preferred diagnostic method. (wikipedia.org)
  • In the present study, the vascular effects of PDT in tumors were investigated with power Doppler ultrasonography. (uzh.ch)
  • CONCLUSIONS: Power Doppler ultrasonography represents a non-invasive modality to successfully monitor the vascular effects and thus, treatment efficacy, of PDT. (uzh.ch)
  • Vascular ultrasonography helps determine multiple factors within the circulatory system. (wikipedia.org)
  • This study obtained new clinical and colour Doppler ultrasound (CDU) data of a polyurethane vascular access graft (PVAG) proposing early post‐operative cannulation. (oup.com)
  • The 3D power Doppler histogram was used to determine the vascular indices, which were plotted against gestational age and compared with neonatal outcome, PAH, gestational age, and FLV. (elsevier.com)
  • In isolated CDH, perinatal outcome and postnatal PAH can be predicted using the vascular indices assessed by 3D power Doppler histogram. (elsevier.com)
  • The potential advantages of microvascular ultrasonography are its superiority in detection and visualization of the small blood vessels in tissues, providing radiologists with more information on the vascular structures. (bvsalud.org)
  • As well as perform all vascular imaging including: 2D scans, duplex imaging, Ankle-Brachial Index (ABI) with and without exercise, and doppler studies. (careerbuilder.com)
  • Quantitative assessment of synovial vascularity using contrast-enhanced power Doppler ultrasonography: correlation with histologic findings and mr imaging findings in arthritic rabbit knee model. (sigmaaldrich.com)
  • A non-invasive method for the assessment of CPP using transcranial Doppler blood flow velocity waveform has been described previously. (bmj.com)
  • dopOSCCI: a functional transcranial Doppler ultrasonography summary suite for the assessment of cerebral lateralization of cognitive function. (ox.ac.uk)
  • Therefore, application of contrast-enhanced Doppler US can be prospective for the assessment of the severity of portal hypertension. (elsevier.com)
  • Evaluation of the sonographic data was conducted by two independent observers and included measurement of synovial area and thickness (grey tone ultrasound), vascularisation (power/colour Doppler), and indices of the intra- and extrasynovial arterial flow (spectral Doppler). (bmj.com)
  • The Doppler indices including resistance index (RI), pulsatility index (PI), time-averaged maximum velocity (TAMV), and blood flow volume (BFV) in the arteries ipsilateral to the uterine torsion (IPUT) and in arteries contralateral to the uterine torsion (COUT) were recorded. (sparrho.com)
  • Doppler indices, which have been commonly used for the evaluation of portal hypertension, include the measurement of portal and splenic venous blood velocity and flows, and the resistive and pulsatility index at hepatic, splenic, renal, superior mesenteric artery. (elsevier.com)
  • A-mode, two-dimensional and Doppler ultrasonography have been used to characterize the ocular biometry, ocular structures and orbital and ocular vasculature respectively, in humans and dogs. (vin.com)
  • [ 11 , 12 ] Traditional lower extremity studies interrogate and review the entire lower extremity vasculature, are performed by an ultrasonography technologist, and are read by a radiologist. (medscape.com)
  • Doppler ultrasonography is medical ultrasonography that employs the Doppler effect to generate imaging of the movement of tissues and body fluids (usually blood), and their relative velocity to the probe. (wikipedia.org)
  • Obstetric ultrasonography, or prenatal ultrasound, is the use of medical ultrasonography in pregnancy, in which sound waves are used to create real-time visual images of the developing embryo or fetus in the uterus (womb). (wikipedia.org)
  • Transcranial Doppler ultrasonography offers non-quantitative measurements of CBF. (bmj.com)
  • Vascularity was also measured by quantitative determination of the power Doppler area (PDA). (jrheum.org)
  • Quantitative power Doppler signal was significantly reduced within 1 week of oral prednisolone, a rapid kinetic suggesting that PDA may have value as a sensitive early marker of therapeutic response. (jrheum.org)
  • Innovative method using Two-Depth Transorbital Doppler (TDTD) of intracranial pressure quantitative absolute (ICP) value measurement relies on the same fundamental principle as used to measure blood pressure with a sphygmomanometer . (wikipedia.org)
  • Navigation of intracardiac catheters by echocardiography is challenging because of the fundamental limitations of B-mode ultrasonography. (elsevier.com)
  • A non-invasive method of CPP measurement has previously been reported based on waveform analysis of blood flow velocity measured in the middle cerebral artery (MCA) by transcranial Doppler. (bmj.com)
  • Transcranial Doppler ultrasonography helps evaluate residual blood flow after brain death, vasospasm of the middle cerebral artery after subarachnoid hemorrhage, and vertebrobasilar stroke. (merckmanuals.com)
  • Color Doppler and power Doppler US demonstrate increased vascularity in the majority of malignant tumors and help to better define testicular involvement [ 2 ]. (hindawi.com)
  • Tumors were examined via power Doppler ultrasonography before, 5 minutes, 1 hour, and 24 hours after PDT. (uzh.ch)
  • Ultrasonography applying the Doppler effect, with frequency-shifted ultrasound reflections produced by moving targets (usually red blood cells) in the bloodstream along the ultrasound axis in direct proportion to the velocity of movement of the targets, to determine both direction and velocity of blood flow. (harvard.edu)
  • By duplex Doppler ultrasonography ocular and orbital vessels were identify and blood flow measurements, including peak systolic velocity, end diastolic velocity, pulsatility index and resistive index, were obtained in external ophthalmic artery and ciliary arteries. (vin.com)
  • Doppler ultrasonography (DUS) measurements of systolic and diastolic vessel diameter and blood velocity were conducted on 16 subjects (mean age 50.6). (springer.com)
  • Color Doppler or color flow Doppler is the presentation of the velocity by color scale. (wikipedia.org)
  • All modern ultrasound scanners use pulsed Doppler to measure velocity. (wikipedia.org)
  • The major advantage of pulsed wave Doppler (PW Doppler) over continuous wave (CW Doppler) is that distance information is obtained (time between transmitted and received pulses multiplied by sound velocity equals distance) and gain correction is applied. (wikipedia.org)
  • Transcranial Doppler (TCD) and transcranial color Doppler (TCCD) measure the velocity of blood flow through the brain's blood vessels transcranially (through the cranium). (wikipedia.org)
  • Ultrasonography applying the Doppler effect, with velocity detection combined with range discrimination. (uchicago.edu)
  • Children at risk of CVA can be identified using transcranial Doppler ultrasonography which enables evaluation of cerebral artery blood flow velocity with a sensitivity of ninety percent and specificity of one hundred percent when compared with cerebral angiography. (mjhid.org)
  • Such hy- ultrasonography, and we measured the resistance in- dex as follows: [1¡(end-diastolic velocity÷maximal pertension may cause nephrosclerosis or glomeru- systolic velocity)] ¬100. (internetpdfarticles.com)
  • To validate contrast-enhanced power Doppler ultrasonography (PD US) for the evaluation of synovial vascularity in an arthritic rabbit knee model in correlation with MR and histological findings. (sigmaaldrich.com)
  • MVDs correlated with color pixel areas of contrast-enhanced power Doppler imaging in arthritic knees. (sigmaaldrich.com)
  • 1 about contrast-enhanced transcranial Doppler ultrasonography (c-TCD) for detection of a patent foramen ovale (PFO) before surgery in the sitting position. (asahq.org)
  • Contrast-enhanced transcranial Doppler ultrasonography is an indirect approach to detect right-to-left shunting and does not allow for an exact anatomic localization of shunts. (asahq.org)
  • In this review we summarize the current knowledge on the role and the importance of the use of Transcranial Doppler Ultrasonography (TCD) as a tracker in primary prevention of stroke in children with sickle cell anemia. (scirp.org)
  • Over an eight-year period at The Children's Hospital of Philadelphia, researchers found that the technique, transcranial Doppler ultrasonography (TCD), along with regular transfusions for children found to be at high risk, reduced stroke to one-tenth of the incidence found before TCD was introduced. (rxpgnews.com)
  • The Stroke Prevention Trial in Sickle Cell Anaemia study (STOP) recommends routine screening with transcranial Doppler ultrasonography in children aged two to sixteen years with SCD. (mjhid.org)
  • After a stroke , your health care provider may order a special kind of Doppler test, called transcranial Doppler, to check blood flow to the brain. (medlineplus.gov)
  • Color Doppler images are generally combined with grayscale (B-mode) images to display duplex ultrasonography images, allowing for simultaneous visualization of the anatomy of the area. (wikipedia.org)
  • The purpose of this study was to evaluate the sonographic technique, including the Doppler technique, as a supplement to the clinical evaluation of synovitis in RA. (bmj.com)
  • Contents The aim of this study was to evaluate luteal dynamics in the Santa Inês ewes using colour Doppler (CD) ultrasonography. (ovid.com)
  • Color Doppler ultrasonography examinations were performed to evaluate the three major arteries of the leg and foot: dorsalis pedis (dp), tibialis posterior (tp), and popliteal (pop). (tevak.org)
  • Conclusion: Colour Doppler ultrasonography offers a sensitive method to evaluate retropharyngeal abscess in children. (elsevier.com)
  • Objective: The purpose of this study was to evaluate the potential of 3-dimensional (3D) power Doppler imaging to predict neonatal outcome and pulmonary arterial hypertension (PAH) in congenital diaphragmatic hernia (CDH). (elsevier.com)
  • To test the hypothesis that the increased ovarian sensitivity to gonadotropins observed in women embarking on an in vitro fertilization (IVF) treatment may be due to changes in ovarian stromal blood flow, we undertook this prospective comparative clinical study using three-dimensional (3-D) power Doppler ultrasound (US). (biomedsearch.com)
  • This study describes the results of clinical tests of the prototype bilateral transcranial Doppler based apparatus for non-invasive CPP measurement (nCPP). (bmj.com)
  • Introduction/Purpose: With the increased use of abdominal CT and ultrasonography, hepatic masses of uncertain clinical relevance are often identified. (avmi.net)
  • Clinical and Doppler u. (oup.com)
  • If the clinical suspicion and pretest probability for a PE are high enough that a spiral computed tomography (CT) scan with intravenous contrast or V/Q (ventilation/perfusion) scan is warranted, then ultrasonography should not delay such studies or any further treatment goals. (medscape.com)
  • We have reviewed briefly the clinical usefulness of Doppler US in assessing the severity of portal hypertension and its response to treatment. (elsevier.com)
  • Doppler ultrasounds , on the other hand, can use imaging to display blood circulation within the vessels. (healthline.com)
  • Specific intracranial flow patterns indicating cerebral circulatory arrest (CCA) can be visualized by transcranial Doppler ultrasonography (TCD). (springer.com)
  • The presence of a urinary jet detected by Doppler ultrasonography further indicates the severity of obstruction and the recovery prognosis. (unifesp.br)
  • Moreover, functional changes in penile blood flow, as seen in erectile dysfunction (ED), can be analyzed using color Doppler ultrasonography (CDUS). (bvsalud.org)
  • An open source autocorrelation-based method for fetal heart rate estimation from one-dimensional Doppler ultrasound. (harvard.edu)
  • Using the same preestablished settings for all cases, power Doppler was applied to each lung, and fetal lung volumes (FLV) were estimated using the rotational technique. (elsevier.com)
  • Exploring this concept, many independent authors have emphasised that specific patterns of transcranial Doppler waveform follow the state of inadequate cerebral perfusion caused by a decrease in CPP. (bmj.com)
  • Validation of color Doppler ultrasonography for evaluating the uterine blood flow and perfusion during late normal pregnancy and uterine torsion in buffaloes. (sparrho.com)
  • It demonstrates a lack of Doppler perfusion compared with the normal splenic tissue. (medicalechography.com)
  • application of the Doppler effect in ultrasound to detect movement of scatterers (usually red blood cells) by the analysis of the change in frequency of the returning echoes. (drugs.com)
  • Doppler ultrasonography examines the blood flow in the major arteries and veins in the arms and legs with the use of ultrasound (high-frequency sound waves that echo off the body). (medlineplus.gov)
  • Salna M, Ikegami H, Willey JZ, Garan AR, Cevasco M, Chan C, Takayama H, Colombo PC, Naka Y, Takeda K. Transcranial Doppler is an effective method in assessing cerebral blood flow patterns during peripheral venoarterial extracorporeal membrane oxygenation. (harvard.edu)
  • We also use color pulsed-wave Doppler ultrasonography to measure testicular blood flow and compare the differences between testicular blood flow in fertile and infertile camelids. (hindawi.com)
  • The significance of this research is that in addition to information obtained from a complete reproductive evaluation, a male camelid's fertility can be determined using testicular blood flow measured by Doppler ultrasonography. (hindawi.com)
  • Furthermore, the blood flow profile provided by a multigated Doppler system may add valuable information concerning blood flow characteristics not obtainable by single-gated systems. (ahajournals.org)
  • 4 With modern high quality sonographic equipment, colour/power Doppler can be used to determine the flow even in small blood vessels. (bmj.com)
  • To investigate the blood flow changes in ophthalmic artery with color Doppler ultrasonography after strabismus surgery. (eurekamag.com)
  • Power Doppler (PD) ultrasonography encodes the amplitude of the power spectral density of the Doppler signal and is a sensitive method for demonstrating the presence of blood flow in small vessels. (jrheum.org)
  • Still other laboratories display the Doppler color map in accordance with published data, with red shift representing longer wavelengths (scattered) from blood flowing away from the transducer and blue representing the shorter wavelengths from blood flowing toward the transducer. (wikipedia.org)
  • Because of this confusion and lack of standards, the sonographer must understand the underlying physics of color Doppler and the physiology of normal and abnormal blood flow in the human body (see Red shift). (wikipedia.org)
  • Intraoperative transcranial doppler ultrasonography monitoring of cerebral blood flow during coronary artery bypass grafting. (semanticscholar.org)
  • Doppler-corrected ultrasound enables real-time viewing of tissues, blood flow, and organs that cannot be obtained by any other method. (lexic.us)
  • The TDTD method uses Doppler ultrasound to translate pressure balance principle of blood pressure measurement with a sphygmomanometer to the measurement of ICP. (wikipedia.org)
  • In place of the stethoscope, a Doppler ultrasound beam measures the blood flow pulsations in intracranial and extracranial segments of the Ophthalmic Artery. (wikipedia.org)
  • Doppler ultrasound scans can be used to determine the speed of the blood flow and its direction. (tidkehospital.com)
  • This information can be helpful in determining if the foetal growth is normal and whether the tissues are supplied with enough blood and nutrients.Doppler scans are performed with the same apparatus as a regular ultrasound scan and are normally used during the third trimester on women who have high-risk pregnancies. (tidkehospital.com)
  • Transcranial Doppler ultrasonography uses sound waves to measure blood circulation in the brain. (barrowneuro.org)
  • You may be a good candidate for transcranial Doppler ultrasonography if you are having symptoms of a blood vessel disorder. (barrowneuro.org)
  • We present a description of a new software package, 'dopOSCCI', which summarises data from experimental studies where functional transcranial Doppler ultrasonography (fTCD) is used to compare hemispheric rates of blood flow in order to assess lateralization of a cognitive process. (ox.ac.uk)
  • A Doppler ultrasound is a test that uses high-frequency sound waves to view the motion of fluids in the blood vessels. (epnet.com)
  • Transcranial doppler is a non-invasive ultrasound method used to examine the blood circulation within the brain. (clevelandclinic.org)
  • A Doppler ultrasound is an imaging test that uses sound waves to show blood moving through blood vessels. (medlineplus.gov)
  • Doppler ultrasound works by measuring sound waves that are reflected from moving objects, such as red blood cells. (medlineplus.gov)
  • It can provide more detail of blood flow than standard color Doppler. (medlineplus.gov)
  • Doppler ultrasound tests are used to help health care providers find out if you have a condition that is reducing or blocking your blood flow. (medlineplus.gov)
  • You may need a Doppler ultrasound if you have symptoms of reduced blood flow or a heart disease. (medlineplus.gov)
  • Power Doppler ultrasonography was performed for carrageenin-induced arthritic left knee and control right knee of 13 rabbits, first without and then with sonic contrast agent enhancement (Levovist, Schering, Berlin Germany), followed by gadolinium-enhanced MR imaging. (sigmaaldrich.com)
  • Arthritic knees had greater power Doppler signal than control knees both before and after contrast administration (p (sigmaaldrich.com)
  • US examination was performed in mode B and power Doppler (PD) in 42 joints. (nih.gov)
  • Quantification of ovarian Doppler signal in hyperresponders during in vitro fertilization treatment using three-dimensional power Doppler ultrasonography. (biomedsearch.com)
  • Power Doppler ultrasound (PDUS) enables visualization of synovial hyperemia in the inflamed RA joint 7 , 8 . (jrheum.org)
  • The Doppler data is displayed graphically using spectral Doppler, or as an image using color Doppler (directional Doppler) or power Doppler (non directional Doppler). (wikipedia.org)
  • Evaluation Of Hepatic Masses With Triphasic Computed Tomography, B-Mode, Color Flow And Power Doppler Ultrasonography Correlated With Histopathology. (avmi.net)
  • Discussion/Conclusion: Triphasic CT had a higher accuracy in predicting lesion classification than B-mode, color or power Doppler ultrasonography. (avmi.net)
  • Study design: In this prospective observational study, 3D-power Doppler ultrasonography was performed in 21 cases with isolated CDH between 23 and 33 weeks of gestation and in 58 controls between 20 and 40 weeks. (elsevier.com)
  • Power Doppler , a newer type of color Doppler. (medlineplus.gov)
  • Used in combination with d -dimer or Doppler ultrasound tests, the prediction rule can reduce the need for contrast venography, as well as the likelihood of false-positive or false-negative test results. (aafp.org)
  • There are different types of Doppler ultrasound tests. (medlineplus.gov)
  • A Doppler scan is similar to a regular ultrasound scan and works using high-frequency sound waves called ultrasound that aren't audible to our ears. (tidkehospital.com)
  • This type of Doppler uses a computer to change sound waves into different colors. (medlineplus.gov)
  • By color Doppler imaging ciliary arteries and veins, external ophthalmic artery and dorsal external ophthalmic vein were easily identified. (vin.com)
  • What is the role of Doppler ultrasonography in the workup of borderline ovarian cancer? (medscape.com)
  • CONCLUSION Ultrasonography is a reliable tool for estimating the size of the joint space and the synovial activity measured by the degree of vascularisation and pattern of flow. (bmj.com)
  • Synovial thickness and vascularity were assessed by ultrasonography at 3 timepoints. (jrheum.org)
  • We present the gray-scale and color Doppler US findings in a case of intratesticular arteriovenous malformation (AVM) which was incidentally diagnosed during work-up for infertility. (hindawi.com)
  • Kirkham FJ, Levin SD, Padayachee TS, Kyme MC, Neville BG, Gosling RG (1987) Transcranial pulsed Doppler ultrasound findings in brain stem death. (springer.com)
  • Preoperative transvaginal color Doppler ultrasonography has been used to assess the possibility of malignancy in ovarian masses. (medscape.com)
  • Transabdominal color Doppler ultrasonography of the IVC was performed in the supine position with the convex probe positioned perpendicular to the upper abdominal wall, and the extent of reflux into the IVC with each heart beat was examined near the diaphragm. (scirp.org)
  • It would be of advantage for both patient and therapist if a similar estimate could be obtained by ultrasonography directly in the outpatients' clinic. (bmj.com)
  • The vessel on the other end showed pulsatile venous flow (Figure 3(b) ) on spectral Doppler US. (hindawi.com)
  • Spectral Doppler ultrasound depicts arterial flow in the feeding pedicle (a) and pulsatile venous flow in the drainage vessel (b). (hindawi.com)
  • The aim of this review is to provide an update on the current use of colour and spectral Doppler ultrasound in stallion andrology, and to promote the use of this technique during the soundness reproductive examination of the stallion, as this particular branch of reproductive medicine is receiving increasing interest. (ovid.com)
  • Spectral Doppler. (medlineplus.gov)
  • Then a computer turns the images into a graph, as in spectral Doppler. (medlineplus.gov)
  • Color Doppler ultrasonography is the test of choice for immediate evaluation of scrotal masses. (aafp.org)
  • Doppler US using microbubble contrast agents allows measurement of IHCT. (elsevier.com)
  • The left and right MCAs were insonated daily (108 measurements) using a purpose built transcranial Doppler monitor (Neuro Q TM , Deltex Ltd, Chichester, UK) with software capable of the non-invasive estimation of CPP. (bmj.com)
  • Mansour acknowledges the support from Alexandria University hospital for conducting the ultrasonography measurements. (springer.com)
  • The disadvantage of pulsed Doppler is that the measurements can suffer from aliasing. (wikipedia.org)
  • Ultrasonography (US) generally reveals a hypoechoic solid mass within the testicular parenchyma. (hindawi.com)
  • If testicular torsion is suspected, emergent surgical consultation with or without Doppler ultrasonography should be obtained. (aafp.org)
  • Background: To analyze the face vascularization pattern using B-mode and Doppler ultrasonography, and also propose an arterial vessel mapping. (uv.es)