Blood Volume Determination: Method for determining the circulating blood volume by introducing a known quantity of foreign substance into the blood and determining its concentration some minutes later when thorough mixing has occurred. From these two values the blood volume can be calculated by dividing the quantity of injected material by its concentration in the blood at the time of uniform mixing. Generally expressed as cubic centimeters or liters per kilogram of body weight.Carmine: Coloring matter from the insect Coccus cacti L. It is used in foods, pharmaceuticals, toiletries, etc., as a dye, and also has use as a microscopic stain and biological marker.Blood Volume: Volume of circulating BLOOD. It is the sum of the PLASMA VOLUME and ERYTHROCYTE VOLUME.Cardiac Volume: The volume of the HEART, usually relating to the volume of BLOOD contained within it at various periods of the cardiac cycle. The amount of blood ejected from a ventricle at each beat is STROKE VOLUME.Plasma Volume: Volume of PLASMA in the circulation. It is usually measured by INDICATOR DILUTION TECHNIQUES.Hypovolemia: An abnormally low volume of blood circulating through the body. It may result in hypovolemic shock (see SHOCK).Erythrocyte Volume: Volume of circulating ERYTHROCYTES . It is usually measured by RADIOISOTOPE DILUTION TECHNIQUE.Cerebrovascular Circulation: The circulation of blood through the BLOOD VESSELS of the BRAIN.Transillumination: Passage of light through body tissues or cavities for examination of internal structures.Hemoglobins: The oxygen-carrying proteins of ERYTHROCYTES. They are found in all vertebrates and some invertebrates. The number of globin subunits in the hemoglobin quaternary structure differs between species. Structures range from monomeric to a variety of multimeric arrangements.Light: That portion of the electromagnetic spectrum in the visible, ultraviolet, and infrared range.Opsins: Photosensitive proteins in the membranes of PHOTORECEPTOR CELLS such as the rods and the cones. Opsins have varied light absorption properties and are members of the G-PROTEIN-COUPLED RECEPTORS family. Their ligands are VITAMIN A-based chromophores.Cardiac Output: 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).PubMed: A bibliographic database that includes MEDLINE as its primary subset. It is produced by the National Center for Biotechnology Information (NCBI), part of the NATIONAL LIBRARY OF MEDICINE. PubMed, which is searchable through NLM's Web site, also includes access to additional citations to selected life sciences journals not in MEDLINE, and links to other resources such as the full-text of articles at participating publishers' Web sites, NCBI's molecular biology databases, and PubMed Central.Periodicals as Topic: A publication issued at stated, more or less regular, intervals.BooksPublishing: "The business or profession of the commercial production and issuance of literature" (Webster's 3d). It includes the publisher, publication processes, editing and editors. Production may be by conventional printing methods or by electronic publishing.MEDLINE: The premier bibliographic database of the NATIONAL LIBRARY OF MEDICINE. MEDLINE® (MEDLARS Online) is the primary subset of PUBMED and can be searched on NLM's Web site in PubMed or the NLM Gateway. MEDLINE references are indexed with MEDICAL SUBJECT HEADINGS (MeSH).Serial Publications: Publications in any medium issued in successive parts bearing numerical or chronological designations and intended to be continued indefinitely. (ALA Glossary of Library and Information Science, 1983, p203)Biological Science Disciplines: All of the divisions of the natural sciences dealing with the various aspects of the phenomena of life and vital processes. The concept includes anatomy and physiology, biochemistry and biophysics, and the biology of animals, plants, and microorganisms. It should be differentiated from BIOLOGY, one of its subdivisions, concerned specifically with the origin and life processes of living organisms.ComputersCardiac Catheterization: Procedures in which placement of CARDIAC CATHETERS is performed for therapeutic or diagnostic procedures.Cardiology: The study of the heart, its physiology, and its functions.Radionuclide Imaging: The production of an image obtained by cameras that detect the radioactive emissions of an injected radionuclide as it has distributed differentially throughout tissues in the body. The image obtained from a moving detector is called a scan, while the image obtained from a stationary camera device is called a scintiphotograph.Heart Defects, Congenital: Developmental abnormalities involving structures of the heart. These defects are present at birth but may be discovered later in life.Pediatrics: A medical specialty concerned with maintaining health and providing medical care to children from birth to adolescence.Heart Murmurs: Heart sounds caused by vibrations resulting from the flow of blood through the heart. Heart murmurs can be examined by HEART AUSCULTATION, and analyzed by their intensity (6 grades), duration, timing (systolic, diastolic, or continuous), location, transmission, and quality (musical, vibratory, blowing, etc).Physiology, Comparative: The biological science concerned with similarities or differences in the life-supporting functions and processes of different species.Hemodynamics: The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.Physical Exertion: Expenditure of energy during PHYSICAL ACTIVITY. Intensity of exertion may be measured by rate of OXYGEN CONSUMPTION; HEAT produced, or HEART RATE. Perceived exertion, a psychological measure of exertion, is included.Hypotension: Abnormally low BLOOD PRESSURE that can result in inadequate blood flow to the brain and other vital organs. Common symptom is DIZZINESS but greater negative impacts on the body occur when there is prolonged depravation of oxygen and nutrients.Physical Endurance: The time span between the beginning of physical activity by an individual and the termination because of exhaustion.Exercise: Physical activity which is usually regular and done with the intention of improving or maintaining PHYSICAL FITNESS or HEALTH. Contrast with PHYSICAL EXERTION which is concerned largely with the physiologic and metabolic response to energy expenditure.Blood Pressure: PRESSURE of the BLOOD on the ARTERIES and other BLOOD VESSELS.Haemonchus: A genus of parasitic nematode worms which infest the duodenum and stomach of domestic and wild herbivores, which ingest it with the grasses (POACEAE) they eat. Infestation of man is accidental.Haemonchiasis: Infection with nematodes of the genus HAEMONCHUS, characterized by digestive abnormalities and anemia similar to that from hookworm infestation.Allergy and Immunology: A medical specialty concerned with the hypersensitivity of the individual to foreign substances and protection from the resultant infection or disorder.Access to Information: Individual's rights to obtain and use information collected or generated by others.Journal Impact Factor: A quantitative measure of the frequency on average with which articles in a journal have been cited in a given period of time.Immune System Diseases: Disorders caused by abnormal or absent immunologic mechanisms, whether humoral, cell-mediated, or both.Capillary Action: A phenomenon in which the surface of a liquid where it contacts a solid is elevated or depressed, because of the relative attraction of the molecules of the liquid for each other and for those of the solid. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Capillaries: The minute vessels that connect the arterioles and venules.Patents as Topic: Exclusive legal rights or privileges applied to inventions, plants, etc.Denture, Complete: A denture replacing all natural teeth and associated structures in both the maxilla and mandible.Denture Cleansers: Substances used to clean dentures; they are usually alkaline peroxides or hypochlorites, may contain enzymes and release oxygen. Use also for sonic action cleaners.Food Coloring Agents: Natural or synthetic dyes used as coloring agents in processed foods.Electrophoresis, Capillary: A highly-sensitive (in the picomolar range, which is 10,000-fold more sensitive than conventional electrophoresis) and efficient technique that allows separation of PROTEINS; NUCLEIC ACIDS; and CARBOHYDRATES. (Segen, Dictionary of Modern Medicine, 1992)Nuclear Medicine: A specialty field of radiology concerned with diagnostic, therapeutic, and investigative use of radioactive compounds in a pharmaceutical form.Technology, Radiologic: The application of scientific knowledge or technology to the field of radiology. The applications center mostly around x-ray or radioisotopes for diagnostic and therapeutic purposes but the technological applications of any radiation or radiologic procedure is within the scope of radiologic technology.Emergency Responders: Personnel trained to provide the initial services, care, and support in EMERGENCIES or DISASTERS.Universal Precautions: Prudent standard preventive measures to be taken by professional and other health personnel in contact with persons afflicted with a communicable disease, to avoid contracting the disease by contagion or infection. Precautions are especially applicable in the diagnosis and care of AIDS patients.Nuclear Medicine Department, Hospital: Hospital department responsible for the administration and management of nuclear medicine services.Radiopharmaceuticals: Compounds that are used in medicine as sources of radiation for radiotherapy and for diagnostic purposes. They have numerous uses in research and industry. (Martindale, The Extra Pharmacopoeia, 30th ed, p1161)Illinois

Measurement of cerebral blood volume using near-infrared spectroscopy and indocyanine green elimination. (1/161)

Methods for measuring cerebral blood volume (CBV) have traditionally used radioisotopes. More recently, near-infrared spectroscopy (NIRS) has been used to measure CBV by using a technique involving O(2) desaturation of cerebral tissue, where the observed change in the concentration of oxygenated hemoglobin is a marker of the volume of blood contained within the brain. A new integration method employing NIRS is described by using indocyanine green (ICG) as the intravascular marker. After bolus injection, concentration-time integrals of cerebral tissue ICG concentration ([ICG](tissue)) measured by NIRS are compared with corresponding integrals of the cerebral blood ICG concentrations ([ICG](blood)) estimated by high-performance liquid chromatography of peripheral blood samples with allowance for cerebral-to-large-vessel hematocrit ratio. It is shown that CBV = integral [ICG]tissue/[ICG]blood. Measurements in 10 adult volunteers gave a mean value of 1.1 +/- 0.39 (SD) ml/100 g illuminated tissue. This result, although lower than previous NIRS estimations, is consistent with the long extracerebral path of light in the adult head. Scaling of results is required to take into account this component of the optical pathlength.  (+info)

Measurement of blood volume in surgical and intensive care practice. (2/161)

Clinical studies to assess the benefits of blood transfusion or haemodilution in critical illness should take account of measured CBV before, during and after intervention. As mentioned above, surrogate measures of CBV are inadequate and studies based on these must be considered incomplete, because they cannot distinguish between effects of changes in haemoglobin concentration and changes in blood volume. The choice of a suitable technique for measuring CBV depends on the facilities available locally. In general, methods based on labelled red cells are more reliable but are technically demanding and time consuming. Those based on albumin are likely to yield false high values and this is particularly true in all patients with impaired capillary integrity. The most promising plasma marker is hydroxyethyl starch which may be particularly useful when the polysaccharide is labelled with a fluorescent dye. Attaching fluorescein to hydroxyethyl starch is not difficult and, should demand be sufficient, it may well become available from manufacturers who are already capable of providing other fluorescent polysaccharides. The clinical benefits of such a development would include more rational schedules of i.v. fluid and blood transfusion management in surgical and intensive care patients.  (+info)

The female reproductive cycle is an important variable in the response to trauma-hemorrhage. (3/161)

Although immune functions in proestrus females are maintained after hemorrhage as opposed to decreased responses in males, it remains unknown whether such a sexual dimorphism also exists with regard to cardiovascular and hepatocellular functions under those conditions. To study this, male and female (estrus and proestrus) rats underwent a 5-cm midline laparotomy and were bled to and maintained at a mean blood pressure of 40 mmHg until 40% of the maximal bleed-out volume was returned in the form of Ringer lactate (RL). Rats were then resuscitated with four times the shed blood volume with RL. At 24 h thereafter, cardiac index; heart performance; hepatocellular function; and plasma estradiol, testosterone, and prolactin levels were measured. Cardiovascular and hepatocellular functions were depressed in males and estrus females (P < 0.05) but were not depressed in proestrus females after resuscitation. Plasma estradiol and prolactin levels were highest in proestrus females (P < 0.05), whereas males had high testosterone and the lowest estradiol levels (P < 0.05). Thus the female reproductive cycle is an important variable in the response to hemorrhage. Because low testosterone and high estradiol and prolactin levels appear to be beneficial for organ functions after trauma-hemorrhage, antagonism of testosterone receptors and/or increases in estradiol and prolactin levels in males and estrus females, respectively, may be novel approaches for improving organ functions under such conditions.  (+info)

Local cerebral blood volume determined by three-dimensional reconstruction of radionuclide scan data. (4/161)

We developed a method to determine in man absolute values of local cerebral blood volume (LCBV) localized throughout the brain in three dimensions and presented in a cross-sectional picture format. Previously, absolute values of LCBV have been determined in vivo by stimulated X-ray fluorescence, but these determinations have been limited to one point in the brain at a time. All other previous estimates of LCBV by external emission counting have been contaminated by the significant contribution of blood in the overlying scalp and cranium. In our method, a transverse section scan is made after the injection of -99m-Tc-labeled red blood cells into a peripheral vein. Data processing then gives a point-to-point estimate of absolute radionuclide concentration analogous to an autoradiograph. After the concentration of blood activity is determined, counting data are converted to a two-dimensional map of LCBV representing a cross section at a known level of the brain. In a series of five baboons, the following equation was obtained for the regression plane that relates LCBV in the center of the brain to arterial carbon dioxide tension (P-ALPHA-CO2) and mean arterial blood pressure (MABP): LCBV equals 2.88 + 0.049P-ALPHA-CO2 MINUS 0.013MABP. In patients, LCBE values ranged from 2 to 4 ml/100 g depending on location; higher values corresponded to regions of cerebral cortex. Differences in blood volumes of focal brain lesions were also quantified.  (+info)

Regulation of extracellular volume and interstitial fluid pressure in rat bone marrow. (5/161)

The volume and fluid pressure characteristics of the intact bone marrow is incompletely understood. We used microspheres and lipoproteins for measurements of intravascular volume (IVV) and EDTA for interstitial fluid volume (IFV) within the rat bone marrow. Interstitial fluid pressure (IFP) was determined with micropipettes connected to a servo-controlled counter-pressure system. Both the microspheres and the lipoproteins yielded estimates of IVV of approximately 1 ml/100 g. After a brief reactive hyperemia, IVV increased to 2.5 ml/100 g, whereas IFV decreased with approximately 1.5 ml/100 g, so that total extracellular volume did not change. Baseline bone marrow IFP was 9.7 mmHg. The hyperemia led to a transient twofold increase in IFP, whereas a marked blood loss decreased IFP by almost one-half. These novel data suggest that extracellular volume and IFP within the bone marrow can be measured with tracer methods and the micropuncture technique. The responses of IVV, IFV, and IFP during changes in blood flow to the bone marrow suggest a tight regulation and are thus compatible with those for a low-compliant tissue.  (+info)

Clinical evaluation of circulating blood volume in critically ill patients--contribution of a clinical scoring system. (6/161)

The circulating blood volume (CBV) of critically ill patients may be difficult to estimate on the basis of history and physical examination. The aim of this study was to evaluate the ability of seven clinical signs and central venous pressure (CVP) to predict CBV in critically ill patients; CBV was evaluated with the [125I]human serum albumin technique. A scoring system was constructed using a combination of independence Bayes method and logistic regression. Sixty-eight patients constituted a 'model development' sample and 30 patients a validation sample. Thirty-six patients (53%) in the model development sample were found to have a low CBV (measured CBV at least 10% lower than the predicted mean normal CBV). Neither the haemodynamic variables monitored in ICU, nor the spot urinary sodium concentrations were different between patients with and without a low CBV. Individually, none of the clinical signs tested have a good positive or negative predictive value. For CVP, only extreme values seem to have clinical significance. To construct the score, the signs tested were ranked according to their discriminating efficacy. The probability of a low CBV was obtained by adding the weights of each sign tested and converting the score obtained into a probability. On a validation sample of 30 patients, the predictions are reliable as assessed by Z statistics ranging between -2 and +2. Our results suggest that: (1) individually, no clinical sign presented a clinical useful predictive value; and (2) a clinical scoring system may be helpful for the evaluation of CBV in critically ill patients.  (+info)

Mechanisms of edema formation after intracerebral hemorrhage: effects of extravasated red blood cells on blood flow and blood-brain barrier integrity. (7/161)

BACKGROUND AND PURPOSE: Red blood cell (RBC) lysis contributes to brain edema formation after intracerebral hemorrhage (ICH), and RBC hemolysate (oxyhemoglobin) has been implicated to be a spasminogen in subarachnoid hemorrhage. Whether cerebral ischemia contributes to brain edema formation after ICH remains unclear, however. The aims of this study were to test whether extravasation of RBCs induces cerebral ischemia and/or blood-brain barrier disruption in a rat ICH model characterized by perihematomal brain edema. METHODS: In this study, 87 pentobarbital-anesthetized Sprague-Dawley rats were used. In each animal, saline, packed RBCs, or lysed RBCs were injected into the right caudate nucleus. Sham injections served as controls. Regional cerebral blood flow, brain water and ion contents, blood-brain barrier integrity, and plasma volume were measured. RESULTS: Intraparenchymal infusion of lysed RBCs caused severe brain edema by the first day but did not induce ischemic cerebral blood flows. In contrast, blood-brain barrier permeability increased during the first day after infusion of lysed RBCs (a 3-fold increase) and 3 days after infusion of packed RBCs (a 4-fold increase). CONCLUSIONS: These results suggest that ischemia is not present at 24 or 72 hours after hematoma induction by injection of intact or lysed RBCs. RBC constituents that appear after delayed lysis, however, increase blood-brain barrier permeability, which contributes to edema formation.  (+info)

Absence of beneficial effect of acute normovolemic hemodilution combined with aprotinin on allogeneic blood transfusion requirements in cardiac surgery. (8/161)

BACKGROUND: The efficacy of acute normovolemic hemodilution (ANH) in decreasing allogeneic blood requirements remains controversial during cardiac surgery. METHODS: In a prospective, randomized study, 80 adult cardiac surgical patients with normal cardiac function and no high risk of ischemic complications were subjected either to ANH, from a mean hematocrit of 43% to 28%, or to a control group. Aprotinin and intraoperative blood cell salvage were used in both groups. Blood (autologous or allogeneic) was transfused when the hematocrit was less than 17% during cardiopulmonary bypass, less than 25% after cardiopulmonary bypass, or whenever clinically indicated. RESULTS: The amount of whole blood collected during ANH ranged from 10 to 40% of the patients' estimated blood volume. Intraoperative and postoperative blood losses were not different between control and ANH patients (total blood loss, control: 1,411 +/- 570 ml, n = 41; ANH: 1,326 +/- 509 ml, n = 36). Allogeneic blood was given in 29% of control patients (median, 2; range, 1-3 units of packed erythrocytes) and in 33% of ANH patients (median, 2; range, 1-5 units of packed erythrocytes; P = 0.219). Preoperative and postoperative platelet count, prothrombin time, and partial thromboplastin time were similar between groups. Perioperative morbidity and mortality were not different in both groups, and similar hematocrit values were observed at hospital discharge (33.7 +/- 3.9% in the control group and 32.6 +/- 3.7% in the ANH group; nonsignificant) CONCLUSIONS: Hemodilution is not an effective means to lower the risk of allogeneic blood transfusion in elective cardiac surgical patients with normal cardiac function and in the absence of high risk for coronary ischemia, provided standard intraoperative cell saving and high-dose aprotinin are used.  (+info)

Multicenter prospective randomized trial to compare heart failure management strategies based on clinical assessment of volume status vs. direct measurement of blood volume with a radioisotope technique. Subjects will be randomly assigned to a standard care strategy with guideline recommended treatment based on serial clinical assessment of blood volume or a measured blood volume strategy with guideline recommended treatment based on serial measured blood volume. All subjects will undergo blood volume measurement procedures, but the testing results will only be returned to the physician in the group assigned to management according to measured blood volume status. Subjects will be blinded to their study treatment assignment status ...
NEW YORK, NY--(Marketwired - Jan 15, 2014) - Daxor Corporation, (NYSE MKT: DXR) The 43rd annual meeting of the Society of Critical Care...
An apparatus is provided for determining a calibration coefficient of a blood property sensor located in a blood system, wherein the blood system can include a vascular portion and an extracorporeal portion. The blood property sensor can be located in the extracorporeal portion to measure the change in a blood property corresponding to the passing of an indicator. The indicator can include a known amount of an introduced dilution indicator. The controller is provided for determining the calibration coefficient of the blood property sensor corresponding to the introduced dilution indicator in the measured change in the blood property.
TITLE AND DESCRIPTION OF COURSES. VPY 211:. Lectures and practicals on the structure and functions of blood. The production, function and degradation of blood cells. Anaemias, blood coagulation, plasma proteins and blood volume measurement. The cardiovascular physiology involves the study of the structure and functions of the heart. The dynamics of blood flow and lymph flow. Blood pressure and heart rate control and regulation. Circulation of blood through special organs e.g. lungs, heart, brain, liver and kidney. Digestion in monogastric animals, prehension, mastication and swallowing. Saliva production and function. Gastric juice production, digestion and absorption of food items. Digestion in the ruminant stomach. Intestinal motility. Hormones of the gut. Avian digestion. Respiratory physiology involves the functions of respiratory system and properties of gas. Mechanism of respiration and gas exchange in the lungs. Regulation of respiratory and buffers in the blood.. Remark: Pre-clinical ...
MediLumine (pronounced ˌmɛdiluˈmin) is a world-leading provider of anatomical and functional micro-CT contrast agents. Our biomimetic Fenestra® lipid emulsions and Mvivo™ nanoparticles are used for a wide array of applications such as angiogenesis blood volume measurements, cardiovascular disease studies, tumor imaging, in-vivo vascular casting and imaging of altered liver function.. ...
Two-dimensional echocardiography can provide serial cross-sectional images of the left ventricular cavity. We examined whether such serial images from steady-state ejecting hearts would allow three-dimensional reconstruction and accurate volume estimation without major geometric assumptions. Cross-circulated, paced dog hearts were suspended in a blood-filled tank. Serial cross-sectional images were taken at 3-mm intervals along the vertical axis. Left ventricular cavity and muscle areas of each image were planimetered with a light-pen system and summated for volume: total volume = sigma (areas x 3 mm). Direct left ventricular volume was measured through the cardiac cycle with a volumetric chamber connected to a balloon in the ejecting left ventricle. In six hearts, 67 separate direct volume measurements (range 9.5--54.7 ml) from various points in the cardiac cycle were compared with the simultaneous echo volume measurements. By least squares linear regression, echo volume = 1.01 (direct volume) ...
On Solaris you need to stop the volume management if you like to use the USCSI fallback SCSI transport code. Even things like cdrecord -scanbus will not work if the volume management is running. Disks made in Track At Once mode are not suitable as a master for direct mass production by CD manufacturers. You will need the disk at once option to record such disks. Nevertheless the disks made in Track At Once will normally be read in all CD players. Some old audio CD players however may produce a two second click between two audio tracks. The minimal size of a track is 4 seconds or 300 sectors. If you write smaller tracks, the CD-Recorder will add dummy blocks. This is not an error, even though the SCSI-error message looks this way. Cdrecord has been tested on an upgraded Philips CDD-521 recorder at single and double speed on a SparcStation 20/502 with no problems, slower computer systems should work also. The newer Philips/HP/Plasmon/Grundig drives as well as Yamaha CDR-100 and CDR-102 work also. ...
Because of the strength in providing high contrasts of soft tissues Magnetic Resonance Imaging (MRI) has been an important medical modality in diagnosis of tissue characterization such as tissue classification and analysis as well as quantitative imaging such as partial volume estimation. Over the past years, numerous techniques have been developed for MRI and can be roughly categorized into two principal approaches. One is a structural approach which is primarily based on spatial correlation among MR image pixels, referred to as voxels. This type of approach is considered as a spatial domain-based clustering technique, examples include edge detection, region growing, segmentation etc. As a result, a structural approach is generally used for tissue characterization such as segmentation, classification, texture analysis. The other is a statistical approach which is essentially a parametric technique based on Finite Gaussian Mixture (FGM) models coupled with Markov Random Field (MRF) to capture ...
Volume Estimation (cont.,)Generalized correlations tutorial of Thermodynamics course by Prof G.K. Suraishkumar of IIT Madras. You can download the course for FREE !
Background and Purpose-Computed tomographic perfusion (CTP) thresholds associated with follow-up brain infarction may differ by time from symptom onset to imaging and reperfusion. We confirm CTP thresholds over time to imaging and reperfusion in patients with acute ischemic stroke from the HERMES collaboration (Highly Effective Reperfusion Evaluated in Multiple Endovascular Stroke Trials) data. Methods-Patients with occlusion on CT angiography were acutely imaged with CTP. Noncontrast CT and magnetic resonance-diffusion weighted imaging at 24 to 48 hours defined follow-up infarction. Reperfusion was assessed on conventional angiogram. Tmax, cerebral blood flow (CBF), and cerebral blood volume maps were derived from delayinsensitive CTP postprocessing. These parameters were analyzed using receiver operator characteristics to derive optimal thresholds based on time from stroke onset-to-CTP or to reperfusion. ANOVA and linear regression were used to test whether the derived CTP thresholds were ...
Although biplane right anterior oblique-left anterior oblique (RAO/LAO) quantitative left ventricular (LV) angiography is commonly performed, justification of LV volume calculation using the area length method (originally formulated from anteroposterior-lateral (AP/LAT) angiograms) has been limited. To assess whether RAO/LAO and AP/LAT LV volumes are similar when computed by the area length method formula, we performed biplane cine LV angiography in both RAO/LAO and AP/LAT projections in random sequence in 21 patients and four LV models of known volume. LV silhouettes were drawn independently by two trained observers. Calculated angiographic volume of the models correlated almost exactly with their true volume (r = 0.999), establishing the absolute accuracy of this system. Rotation of the LV models through 90 degrees of obliquity at 10 degree increments demonstrated a mean change from true volume of only -5.4 +/- 0.7% (p less than 0.001). In the patient studies, rotation to the 30 degree RAO/60 ...
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.
coral-thrombus: A red thrombus formed in a short time from slowly moving blood, the coagulating fibrin having entangled the red corpuscles before they had time to sink.
Since 2001, Vimax Pills Male Enhancement have been purchased by over million men worldwide. Vimax Pills Male Enhancement is trusted by peoples around the world for its great safety and effectiveness. Vaso 9 ultraVaso 9 Home - Diverse Abilities.
Density or volume measurement is commonly used in the blending process to meet a specific density target of the two blended fluids with the end goal of maintaining a very tight accuracy of blend to minimize blending costs ...
Nuclear fuel technology - Tank calibration and volume determination for nuclear materials accountancy - Part 6: Accurate in-tank determination of liquid density in accountancy tanks equipped with dip tubes
Objective: To determine the accuracy of volumetric analysis of teeth in vivo using cone-beam computed tomography (CBCT). Materials and Methods: The physical volume (Vw) of 24 bicuspids extracted for orthodontic purposes (16 were imaged with the I-CAT and 8 with the CB MercuRay) were determined using the water displacement technique. Corresponding pretreatment CBCT image data were uploaded into Amira 4.0 for segmentation and radiographic volume (Va). All measurements were performed twice by two observers. The statistical difference between Vw and Va was assessed using a paired Hest. The intraobserver and interobserver reliability were determined by calculating Pearson correlation coefficients and intraclass correlation coefficients. Results: The overall mean Vw of teeth specimens was 0.553 +/- 0.082 cm(3), while the overall mean Va was 0.548 +/- 0.079 cm(3) (0.529 +/- 0.078 cm(3) for observer 1 and 0.567 +/- 0.085 cm(3) for observer 2). There were statistically significant differences between Va ...
Dynamic and flow-based parameters are more informative than conventional parameters in determining fluid responsiveness and may help you avoid excessive and insufficient fluid administration.7 Clinical studies have shown that conventional volume management methods, based on conventional parameters, are misleading and insensitive.6 Advanced hemodynamic parameters such as stroke volume (SV) and stroke volume variation (SVV), are key to optimal fluid administration.. SVV has been proven to be a highly sensitive and specific indicator for preload responsiveness when managing perfusion. As a dynamic parameter, SVV has been shown to be an accurate predictor of fluid responsiveness in loading conditions induced by mechanical ventilation.6,8,9. ...
Introduction Placental dysfunction leads to intrauterine compromise and stillbirth. Hypoxia is usually cited as the underlying mechanism in pregnancies complicated by hypertensive disorders, and syncytial deportation (inferred by the presence of syncytial knots) is commonly found on light microscopy. It has been suggested that the same mechanism may underpin intrauterine death in diabetic pregnancy. We set out to test the hypothesis that syncytial knot formation was a more common finding in diabetic pregnancy.. ...
We introduce a novel contrast mechanism for imaging blood flow by use of magnetomotive optical Doppler tomography (MM-ODT), which combines an externally applied temporally oscillating high-strength magnetic field with ODT to detect erythrocytes moving according to the field gradient. Hemoglobin contrast was demonstrated in a capillary tube filled with moving blood by imaging the Doppler frequency shift, which was observed independently of blood flow rate and direction. Results suggest that MM-ODT may be a promising technique with which to image blood flow.. © 2006 Optical Society of America. Full Article , PDF Article ...
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.
The results were somewhat surprising. In preparing their hypothesis, the research team estimated that smaller particles were probably the most effective since they would move the most in collisions with blood cells, much like what happens when a small ball bounces off a larger one. But just the opposite proved true. The smaller particles appeared to skirt through the mass of moving blood cells and were less likely to experience the "trampoline" effect and get bounced to the cell-free layer, says Ma.. Ma proposed the study after talking to a UConn pharmaceutical scientist about drug development at a campus event five years ago.. "We had a great conversation about how drugs are made and then I asked, But how can you be sure where the particles go?" Ma recalls, laughing. "Im an engineer. Thats how we think. I was curious. This was an engineering question. So I said, Lets write a proposal!". The proposal was funded by the National Science Foundations Early-concept Grants for Exploratory ...
These scientific tests looks convinced, and seems fine for all these while. But if you think about it deeply, it might not be the actual story. Lets take the example of RBCC and anemia. Anemia means the total blood volume in someone body is not sufficient. Are you convinced that just a few tenth or hundred CC of blood that a blood test can measure your total blood volume? In brief, blood test assay is taking proportion of certain substance inside a certain volume of blood, which is quantitative measurement. It doesnt sounds logic that we can measure total blood volume inside a body using this kind of quantitative measurement. Let me describe using a real life example. Assume inside a mall there are 1 million people and we do not know. We would like to know the total number of people and we started the survey. If we sample using 100 people, 60 men and 40 women, we may be able to get the proportion of man to woman in the mall, but we will never able to know the total number of people inside the ...
DI-fusion, le Dépôt institutionnel numérique de lULB, est loutil de référencementde la production scientifique de lULB.Linterface de recherche DI-fusion permet de consulter les publications des chercheurs de lULB et les thèses qui y ont été défendues.
An Alternative Method to the Volume Estimation of Cavities with Irregular Surface in the Cadaver: Measuring Right Cardiac Ventricle of the Fetus by Using Mercury ...
INTRODUCTION: Cerebral vasospasm is the leading cause of morbidity and mortality in patients with aneurysmal subarachnoid haemorrhage (SAH) surviving the initial ictus. Commonly used techniques for vasospasm assessment are digital subtraction angiography and transcranial Doppler sonography. These techniques can reliably identify only the major vessel spasm and fail to estimate its haemodynamic significance. To overcome these issues and to enable comprehensive non-invasive assessment of vasospasm inside the interventional suite, a novel protocol involving measurement of parenchymal blood volume (PBV) using C-arm flat detector computed tomography (FDCT) was implemented. MATERIALS AND METHODS: Patients from the neuro-intensive treatment unit (ITU) with suspected vasospasm following aneurysmal SAH were scanned with a biplane C-arm angiography system using an intravenous contrast injection protocol. The PBV maps were generated using prototype software. Contemporaneous clinically indicated MR scan including
In medicine, intravascular volume status refers to the volume of blood in a patients circulatory system, and is essentially the blood plasma component of the overall volume status of the body, which otherwise includes both intracellular fluid and extracellular fluid. Still, the intravascular component is usually of primary interest, and volume status is sometimes used synonymously with intravascular volume status. It is related to the patients state of hydration, but is not identical to it. For instance, intravascular volume depletion can exist in an adequately hydrated person if there is loss of water into interstitial tissue (e.g. due to hyponatremia or liver failure). Volume contraction of intravascular fluid (blood plasma) is termed hypovolemia, and its signs include, in order of severity: a fast pulse infrequent and low volume urination dry mucous membranes (e.g. a dry tongue) poor capillary refill (e.g. when the patients fingertip is pressed, the skin turns white, but upon release, the ...
Description Spirometry (Current Procedural Terminology [CPT] code 94010 [spirometry], 94060 [spirometry before and after bronchodilators]) assesses the integrated mechanical function of the lung, chest wall, and respiratory muscles by measuring the total volume of air exhaled from a full lung (total lung capacity [TLC]) to maximal expiration ...
In a recent issue of AJKD, Severs et al highlighted the complications of commonly used intravenous solutions for volume management. Complete our nephrology jumble-bumble to test your knowlegde on fluid management!. ...
Previous studies applying automatic preprocessing methods on Structural Magnetic Resonance Imaging (sMRI) report inconsistent neuroanatomical abnormalities in Autism Spectrum Disorder (ASD). In this study we investigate inter-method differences as a possible cause behind these inconsistent findings. In particular, we focus on the estimation of the following brain volumes: gray matter (GM), white matter (WM), cerebrospinal fluid (CSF), and total intra cranial volume (TIV). T1-weighted sMRIs of 417 ASD subjects and 459 typically developing controls (TDC) from the ABIDE dataset were estimated using three popular preprocessing methods: SPM, FSL, and FreeSurfer (FS). Brain volumes estimated by the three methods were correlated but had significant inter-method biases; except TIVSPM versus TIVFS, all inter-method differences were significant. ASD versus TDC group differences in all brain volume estimates were dependent on the method used. SPM showed that TIV, GM, and CSF volumes of ASD were larger than TDC
Your heart pumps blood through a network of arteries, veins, and capillaries. The moving blood pushes against the arterial walls, and this.... ...
The ventricles are the large lower chamber of the heart. They are responsible for moving blood to the organs and tissues of the body. In ventricular fibrillation, the hearts ventricles contract in a rapid and chaotic manner. As a result, little or no blood is pumped from the heart. Unless medical help is provided immediately, ventricular fibrillation will lead to cardiovascular collapse and sudden death.. ...
The hearts physical function is to move blood, pumping and moving blood 24/7 with every heartbeat. The heart has to be physically very strong and powerful because it has a … Lire la suite... ...
... analysis is not only used for the determination of BET-surface area but for the analysis of pore size distribution and total pore volume determination as well.
Intragastric Balloons procedure includes initially uninflated balloons are inserted in to the stomach and then inflate the balloons in the stomach to decre
Seating systems are platform designed to accommodate the person seating in vehicle. Seating has modified through simple seating systems to complex masterpiece
A method and device for the continuous real-time monitoring of relative blood volume change, based on registration of blood hemoglobin concentration, during long periods of time, such as dialysis session. A method and device for cardiac output measurement, based on optical dilution technique, during dialysis, surgeries, intensive care procedure. The effects of blood electrolyte composition change which result in a change of light beam geometry are eliminated by the relative orientation between a light source and a single light or photodetector. An illumination axis and a detection axis are oriented in an offset, non colinear configuration at a sufficient angle to substantially eliminate the scattering properties of the blood. A primary implementation of the device is extracorporeal paths, such as hemodialysis tubing systems, artery-vein extracorporeal artificial shunts, other extracorporeal systems. It also may be applied to vessels, tissues or to body parts being capable of transillumination.
Author: Huber, Laurentius et al.; Genre: Journal Article; Published in Print: 2014; Keywords: Vascular space occupancy; Slab-selective VASO; Cerebral blood volume; 7 Tesla; fMRI acquisition techniques; Title: Slab-selective, BOLD-corrected VASO at 7 Tesla provides measures of cerebral blood volume reactivity with high signal-to-noise ratio
A method, system, and computer program product for identifying and reserving suitable replacement storage devices for use when a storage device underlying a logical volume fails or when the size of the volume is to be increased. Replacement devices are reserved if they conform to the intent of a creator of the logical volume and at the time of creation or reconfiguration of the logical volume. Volume management operations like resizing the volume and evacuating data from the volume use the reserved disks that have already been allocated as suitable to preserve the intent of the creator of the logical volume. Reserving replacement disks in advance ensures that a backup disk is available and eliminates the need to perform a lengthy, time-consuming search for a suitable replacement disk that conforms to the intent of the logical volume.
Petrophysicist, International assignment 1988 - 1995. (Oil Reservoirs, two assignments to The Hague -Netherland for petrophysical studies). Education. University of Damascus, Syria Bachelor of Science in Geology. Technical and Professional Courses:. ● Geomechanics of the Oilfield: "Application to Fracture Permeability". ● Advances in Performance Diagnostics for Fractured and Horizontal Wells. ● SPE Applied Technology Workshop. ● SPE Tight Gas Development Forum. ● P-265 (PP role in building static and dynamic models; Petrel and FasTrack introduced). ● Coal Bed Methane. ● Womens Career Development Program. ● Managing Risks and Strategic Decisions in Petroleum Exploration & Production. ● Reservoir Characterization: A multi-discipline team approach. ● Evaluation of Canadian Oil & Gas Properties. ● Hydrocarbon: Volume Management (Models 1, 2, and 3). ● Reservoir Management. ● Examination and Description of Carbonate Sediments (Core). ● Identifying Bypass ...
One metre billets of known volume were piled in 1 m,sup,3,/sup, stacks to estimate a stacked to solid volume conversion ratio. An average conversion factor of 0.44 for stacked to solid volume was calculated. Mean stackwood yield (m,sup,3,/sup,) per m,sup,2,/sup, of basal area removed was 16.1 m,sup,3,/sup,m,sup,-2,/sup,. Stand basal area (m,sup,2,/sup,ha,sup,-1,/sup,) and height (m) varied between sample plots. There was no significant correlation between total plot basal area (m,sup,2,/sup,) and yield (m,sup,3,/sup,) per m,sup,2,/sup, basal area removed, but there was a significant correlation between tree height (m) and yield. Regression models of stackwood yield against basal area removed and mean height were developed for the estimation of stackwood volume for miornbo woodland in Malawi. ...
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, ...
Before the pump is activated, all air is evacuated from the device, the left ventricle and the aorta. The pump is switched on, and if cardiopulmonary bypass was used, the patient is weaned from the heart-lung bypass machine. Due to the small size of the device and less invasive surgery, the Jarvik 2000 also can be successfully implanted without the use of a heart-lung bypass machine. See Off-pump Insertion of the Jarvik 2000 Left Ventricular Assist Device, by Craig H. Selzman, MD. The CardioThoracic Surgery Network, February 21, 2008.. Even before the incisions are closed, the Jarvik 2000 goes to work moving blood through the heart and restoring a physiologic equilibrium to the body. The implantation process usually takes 2-5 hours.. As with open heart surgery of any kind, there are risks, including death. Each patient should discuss possible risks and benefits with his/her own doctor before deciding what treatment is best.. ...
A non-invasive system for measuring the concentration of an analyte, such as glucose, in an absorbing matrix is described. The system directs beams of light at the matrix using an analyte sensitive wavelength and an analyte insensitive wavelength. The principles of photoplethysmography are applied to measure the change in light intensity caused by matrix absorption before and after the blood volume change caused by the systolic phase of the cardiac cycle. The change in light intensity is converted to an electrical signal which is used to adjust the light intensity and as a measure of analyte concentration.
The cord provides oxygen and other essentials to the baby in the womb and in the first few minutes after the birth, while the babys lungs are inflating and acclimating to breathing air for the first time. Its essential for babys oxygenation that the cord remain intact for a *minimum* of 3 minutes after the birth, according to the World Health Organization. Additionally, since the blood in the placenta and cord are part of the babys total blood volume and designed to be returned to the baby through the cord after the birth, if the cord is clamped and cut prematurely, the baby is deprived of 30-40% of his total blood volume, which means that many babies have low iron levels due to that blood loss. This is a health problem called "anemia," and its measurable for 6 months or more after the birth in babies whose cords were cut too early ...
Several studies have demonstrated increased rCBV in high-grade gliomas compared with low-grade tumors.2,4-6,8-10 There is, however, considerable variation in the reported rCBV values for low- and high-grade tumors (On-line Table). In SE-EPI DSC imaging, transverse relaxation rates peak at a vessel diameter of 1-2 μm, whereas in GE-EPI DSC imaging they plateau at 3-4 μm and then remain independent of vessel size, explaining the lower rCBVs found with SE techniques.6 Differences may also be due to variations in the histologic types of LGG examined and inclusion or exclusion of intratumoral vessels in the analysis, often not specified.. We demonstrated that inclusion of large intratumoral vessels significantly increases rCBVmax values in all types of LGG. Their identification may be difficult on rCBV color maps alone and necessitates reviewing of unprocessed perfusion data. The diameter of intratumoral vessels clearly identifiable on GE-EPI images lies in the millimeter range (approximating the ...
MATERIALS AND METHODS: We retrospectively analyzed DSC-MR imaging of treatment-naïve, pathology-proved glioblastomas (n = 14), primary central nervous system lymphomas (n = 7), metastases (n = 20), and meningiomas (n = 13) using a protocol designed for relative CBV accuracy (a one-quarter-dose preload and single-dose bolus of gadobutrol, TR/TE = 1290/40 ms, flip angle = 60° at 1.5T). Mean percentage signal recovery, relative CBV, and normalized baseline signal intensity were compared within contrast-enhancing lesion volumes. Classification accuracy was determined by receiver operating characteristic analysis. ...
In this study of patients in an outpatient HF clinic, specialised nurses were able to perform and interpret point of care US examination of the IVC and the pleural cavities to assess volume status with excellent quality, in contrast to the poor inter-observer agreement of medical history, clinical signs and physical examination. In regression analyses, the estimated volume status based on US predicted dose adjustments of diuretics significantly better than any other tool used to assess patients volume status and guide therapy.. Patients with HF are encumbered with substantial morbidity and this was also the case in this study population. Pleural effusion is closely related to congestion and decompensation among HF patients and may be difficult to detect both by clinical examination and chest X-ray.14 However, pleural effusion is easily assessable by US and at first visit pleural effusion was present in 42% of the patients. Detection of newly developed pleural effusion in HF patients may ...
Modifications are described which make T-1824 suitable for plasma volume determinations on small bats. An average plasma volume of 6.5 ml/100 gm body weight has been determined for the active little brown bat, Myotis lucifugus; average blood volume, based on plasma volume and hematocrit, is 13.0 ml/100 gm body weight. Seasonal changes have been observed which apparently result primarily from changes in lean body weight and from pregnancy. Young bats have a proportionately greater blood volume. No significant differences have been found between sexes, nor between determinations made during day and night hours. Plasma and blood levels are changing least at the beginning and end of the hibernating period. Comparisons of previous studies suggest that, while a plasma decrease and unchanged cell volume seem generally characteristic of mammals which have entered hibernation, a concurrent drop in heart blood hematocrit of the hibernating bat suggests a redistribution of erythrocytes as well.. ...
Apparatus for transcutaneously producing visual images of the internal dimensions of blood vessels in the human body is disclosed including an ultrasonic pulsed Doppler blood velocity detector having a transducer adapted to transmit a beam of ultrasound toward a blood vessel and detect ultrasound reflected from moving blood particles. The transducer is held by a mechanical arm capable of sensing the position and orientation of the transducer. The position and orientation of the transducer are combined with the distance of the blood vessel therefrom to locate the beam of an oscillographic storage display unit. A frequency detector is employed to intensify the beam of the storage display unit to write a spot on the display whenever the output of the pulsed Doppler is above a pre-set amplitude and frequency indicating blood flow within the blood vessel.
The heart meridian is a yin meridian and is paired with the small intestine yang meridian. The hearts physical job is to move blood, pumping and moving blood non-stop with every heartbeat. The heart has to be physically very strong and powerful because it has a constant job to keep pumping blood throughout the entire life of a person.. The mental and spiritual qualities of the heart are very powerful. A person with a healthy heart is a happy and grateful person and a person with a weak heart often leads a miserable life. In todays modern societies, many people suffer from imbalances of the heart due to living lifestyles that are not in our hearts just to "pay the bills". Modern society can also be very lonely for many people, which can also lead to a weak heart.. ...
TY - JOUR. T1 - Recommendations for quantitation of the left ventricle by two-dimensional echocardiography. American Society of Echocardiography Committee on Standards, Subcommittee on Quantitation of Two-Dimensional Echocardiograms.. AU - Schiller, N. B.. AU - Shah, P. M.. AU - Crawford, M.. AU - DeMaria, A.. AU - Devereux, R.. AU - Feigenbaum, H.. AU - Gutgesell, H.. AU - Reichek, N.. AU - Sahn, David. AU - Schnittger, I.. PY - 1989/9. Y1 - 1989/9. N2 - We have presented recommendations for the optimum acquisition of quantitative two-dimensional data in the current echocardiographic environment. It is likely that advances in imaging may enhance or supplement these approaches. For example, three-dimensional reconstruction methods may greatly augment the accuracy of volume determination if they become more efficient. The development of three-dimensional methods will depend in turn on vastly improved transthoracic resolution similar to that now obtainable by transesophageal echocardiography. ...
1. The respiratory rates in vitro of ten structures of the rabbit brain were measured in the presence of a normal (5mm) and an elevated (50mm) concentration of K+ ions. The results were expressed on a dry-weight basis and in terms of cell density. 2. On a dry-weight basis, with a normal concentration of K+, there was a steady decrease in respiratory rate on passing from the cerebral cortex through successively lower centres to the brain-stem, i.e. respiration was negatively correlated with phylogenetic age. 3. When the resting respiratory rates were expressed in terms of cell density there was no correlation with phylogenetic age. The neuron-containing structures of the cerebrum and brain-stem had identical respiratory rates with the exception of the cerebral cortex which had a higher rate. 4. The K+-stimulated respiratory rates/cell also showed a negative correlation with phylogenetic age; the higher centres responded with a greater percentage increase than the lower. 5. The results from the ...
The Case A 55-year-old man with history of nonischemic cardiomyopathy and severe systolic dysfunction, as well as diffuse atherosclerotic vascular disease, was brought to the emergency department for septic shock of possible intra-abdominal origin. Owing to his cardiac condition, he was given a minimal fluid challenge and vasopressor support was ordered.
Collagen & Gelatin Market for Regenerative Medicine (by Source (Bovine, Porcine, Marine), Application (Wound Care, Orthopedic, Cardiovascular)), Value and Volume Analysis - Global Forecast to 2022
La prima crema capace di garantire un perfetto equilibrio tra sebo e idratazione appositamente studiata per le pelli grasse, impure e miste. Vaso Air less da 50ml.
Bell Beaker, Beaker Folk, Glockenbecherkultur, Culture Campaniforme, Cultura del vaso campaniforme, Klokbekercultuur, Kultura pucharow dzwonowatych
Randomized studies assessing the role of BVM and BVM-guided UF biofeedback in the prevention of IDH are limited and of low quality. One the largest studies assessing BVM without biofeedback, which was done by Reddan et al., randomized 443 participants to BVM or conventional HD over a 6-month period. Participants in the BVM group had UF rates adjusted at the discretion of the bedside dialysis nurse with a suggested UF algorithm. Due to the need for manual adjustment of the UF rate, it is unclear if the nurses promptly responded to changes in relative blood volume using the suggested algorithm. In fact, the participants randomized to BVM had increased hospitalization and mortality, which may have reflected a lack of adherence to the UF algorithm, or alternatively could have been related to more cautious fluid removal due to the feedback provided by the BVM device [33].. However, when BVM is combined with biofeedback there may be a beneficial reduction in IDH and blood pressure [31, 32, 41, 54]. In ...
Results The total volume of 154 finger joints was estimated. A significant correlation between manual and stereologic estimations of synovial volumes was found (Spearman rho = 0.71, P = 0.002). 95% limits of agreement were ± 5-6 ml (14 finger joints per patient). The time used for volume determination in a patient varied from 1-2.5 h by manual outlining and from 0.5-1 h by stereologic determination. ...
The right atrium receives blood from the veins in the body and transports blood to the right ventricle, and the left atrium receives blood from the lungs and transports it to the left ventricle. The right ventricle is responsible for moving blood to the lungs, while the left ventricle moves blood to the rest of the body.. The valves between these chambers control the way that blood flows through the heart. The tricuspid and pulmonary valves are on the right side of the heart, and the mitral and aortic valves are on the left side of the heart. All valves resemble flaps, and each valve is made up of segments or leaflets. The valves open and close to keep blood flowing through the heart in only one direction. On the left side of the heart, oxygenated blood returns to the left atrium from the lungs. During the resting phase of the heart cycle, the left atrium contracts, and blood flows across the mitral valve to fill the muscular pumping chamber, or left ventricle. A heart beat occurs (and a pulse ...
S. N. ALBERT, R. P. MEAGHER, W. BRUNER, C. A. ALBERT; Combined Use of Fe-59 and Cr-51 Radioisotope Tracers for Simultaneous Measurement of Plasma and Red Cell Volume and Index of Erythropoiesis. Anesthesiology 1962;23(1):138. Download citation file:. ...
Liquid Biopsy Tests are emerging as a viable alternative to traditional methods for cancer screening. A liquid biopsy is a new type of blood test that has the potential to transform cancer treatment. Using this methodology, physicians avoid the traditional surgical and needle biopsies they use to determine the existence of cancer in patients.
The circulatory transport system resembles an enormous branching tree; if combined end to end, the various branches would measure roughly 30,000 miles of blood vessels. The heart is the engine of the transport system. As the hearts energy or pressure is displaced into the circulatory system, pressure falls progressively along a gradient. On the arterial side, pressure is highest in the larger vessels (arteries) and decreases throughout the system, reaching its lowest point in the smaller vessels (capillaries). In addition, as blood travels further from the aorta where the circulatory tree divides, resistance to blood flow decreases as cross-sectional area increases. Although the volume pumped out of the heart equals the volume that returns to the heart (CO = venous return), total blood volume isnt distributed equally within the circulatory system. Most of the total blood volume is stored on the venous side as a reservoir. As the heart ejects blood and blood flows down the circulatory tree into ...
When was the last time you assessed a JVD comfortably? We often say "this patient is dry" or that he needs diuresis but how accurate are our assessments based on the clinical exam alone?. A previous post discussed the JVP and its use as a tool for volume status assessment and cited a systematic review stating that there is a "poor relationship between the isolated inspection of CVP and prediction of blood volume and fluid responsiveness." One of my attendings gave me an article on this topic several weeks ago: "Clinical assessment of extracellular fluid volume in hyponatremia". The article assessed the clinical judgment of volume status by one of the authors (including cardiac parameters, JVP, orthostatic changes, skin turgor, moisture in the axillae, hydration of mucous membranes) and volume status was objectively assessed by spot urine samples of sodium and creatinine and BUN, norepinephrine and plasma renin concentrations. The clinical assessment was only able to identify 47 % of ...
Why does the preferred CCT have a lower value than natural CCT? A possible reason for this effect is that observers prefer scenes that are more colorful, corresponding to a larger color gamut. This would be consistent with experiments in which the image quality is maximum when average chroma is higher than that obtained with natural illuminants (Fedorovskaya, De Ridder, & Blommaert, 1997). Figure 14a shows the pseudocolor map of the convex hull volume expressed in CIELAB space of the Munsell set rendered by the daylights tested. The volume has a maximum close to the average chromaticity for preference (open circle symbol). It also increases in the direction of negative DC, suggesting that scenes can look more colorful or vivid with these purplish daylights. This result obtained with the Munsell set also holds for the group of scenes tested. The color volume map of each scene was normalized, and the result was averaged across all scenes tested. The CCT producing the maximum chromatic volume of ...
Zucker, R M.; Finley, J; and Kambour, M, "The study of chemotherapy schedules using electronic cell volume analysis of l1210 ascites leukemia cells. Abstr." (1977). Subject Strain Bibliography 1977. 2958 ...
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En Física estamos aprendiendo sobre la presión. Eduardo nos pidió que hicieramos dos experimentos: el del huevo y el del agua en un vaso tapado por papel.. En el primero lo unico que se necesitó fue un huevo. Se aplicó fuerza en las puntas mas angostas y no se rompió.. En el segundo se llenó un vaso con agua hasta el borde, se lo tapo con un papel y con cuidado se dio vuelta y vimos que el agua no salió.. Este es el video mostrandolos:. ...
Soma Technology, Inc. offers the GE OEC 9600 C-Arm Providing Solutions to The Most Demanding Needs in Pain Management, General, Orthopedic, Vascular, and Neurovascular surgeries.
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D Psirropoulos, Ap Efthimiadis, G Boudonas, I Papadopoulos, G Papadopoulos, D Ekklisiarchos, M Parthenis, T Constantinidis, N Lefkos. ...
This study investigated whether excision of either the right or left atrial appendage of rats alters their natriuretic response and the release of atrial natriuretic factor during acute blood volume expansion or reduction. These animals were subjected to a thoracotomy and either had their right or left atrial appendages removed or underwent a right or left atrial sham appendectomy for comparative, control purposes. Intrajugular vein, intracarotid artery, and intravesical catheters were installed 3-4 weeks later under sodium pentobarbital anesthesia. Then, when the rats were conscious, blood volume was expanded using blood from donor rats once every 15 minutes in 3 increments of 10% of the calculated total blood volume at a rate of 5 ml/kg/min. Blood and urine samples were collected before volume expansion and at the end of each 15-minute period, with the withdrawn blood being replaced. A maximal fourfold increase in urinary volume, urinary sodium excretion, and plasma atrial natriuretic factor ...
The human hippocampal formation is characterized by anterior-posterior gradients of cell density, neurochemistry, and hemodynamics. In addition, some functions are associated with specific subfields (subiculum, CA1-4, dentate gyrus) and regions (anterior and posterior). We performed contrast-enhanced, high-resolution T1-weighted 3T steady state (SS) imaging to investigate cerebral blood volume (CBV) gradients of the hippocampal formation. We studied 14 healthy subjects and found significant CBV gradients (anterior , posterior) in the subiculum but not in other hippocampal subfields. Since CBV is a marker of basal metabolism, these results indicate a greater baseline activity in the anterior compared with the posterior subiculum. This gradient might be related to the role of the subiculum as the main outflow station of the hippocampal formation and might have implications for the mechanisms of neuropsychiatric disorders. © 2014 Wiley Periodicals, Inc. ...
DI-fusion, le Dépôt institutionnel numérique de lULB, est loutil de référencementde la production scientifique de lULB.Linterface de recherche DI-fusion permet de consulter les publications des chercheurs de lULB et les thèses qui y ont été défendues.
View Gankhuyag,Sengum_vital capacity_Period 3.pdf from PHYSICS 303 at Warren High School. Vital Capacity 3/19/18 Volume Measurement (L) Individual (L) Sengum Gankhuyag Class average male Class
A great decrease in total circulating hemoglobin and red cell volume occurs in dogs long maintained under sedentary conditions when they are exercised vigorously during several consecutive days. This would appear to be consequent on increased blood d
December 15, 2000, Volume 25, Number 24 (Pages 2865-2934). December 1, 2000, Volume 25, Number 23 (Pages 2783-2864). November 15, 2000, Volume 25, Number 22 (Pages 2709-2782) November 1, 2000, Volume 25, Number 2 (Pages 2625-2708). October 16, 2000, Volume 25, Number 20 (Pages 2505-2624) October 2, 2000, Volume 25, Number 19 (Pages 2359-2504) September 15, 2000, Volume 25, Number 18 (Pages 2279-2358). September 1, 2000, Volume 25, Number 17 (Pages 2187-2278). August 15, 2000, Volume 25, Number 16 (Pages 2041-2186). August 1, 2000, Volume 25, Number 15 (Pages 1951-2040). July 17, 2000, Volume 25, Number 14 (Pages 1823-1950). July 3, 2000, Volume 25, Number 13 (Pages 1675-1822). June 15, 2000, Volume 25, Number 12 (Pages 1525-1674). June 1, 2000, Volume 25, Number 11 (Pages 1379-1524). May 15, 2000, Volume 25, Number 10 (Pages 1189-1378). May 1, 2000, Volume 25, Number 9 (Pages 1055-1188). April 17, 2000, Volume 25, Number 8 (Pages 921-1054). April 3, 2000, Volume 25, Number 7 (Pages ...
December 17, 2001, Volume 26, Number 24 (Pages 2339-2468). December 3, 2001, Volume 26, Number 23 (Pages 2251-2338). November 15, 2001, Volume 26, Number 22 (Pages 2211-2250). November 1, 2001, Volume 26, Number 21 (Pages 2069-2210). October 15, 2001, Volume 26, Number 20 (Pages 1955-2068). October 1, 2001, Volume 26, Number 19 (Pages 1883-1954). September 17, 2001, Volume 26, Number 18 (Pages 1787-1882). September 4, 2001, Volume 26, Number 17 (Pages 1617-1786). August 15, 2001, Volume 26, Number 16 (Pages 1563-1616). August 1, 2001, Volume 26, Number 15 (Pages 1497-1562). July 16, 2001, Volume 26, Number 14 (Pages 1387-1496). July 2, 2001, Volume 26, Number 13 (Pages 1301-1386). June 15, 2001, Volume 26, Number 12 (Pages 1151-1300). June 1, 2001, Volume 26, Number 11 (Pages 1119-1250). May 15, 2001, Volume 26, Number 10 (Pages 1001-1118). May 1, 2001, Volume 26, Number 9 (Pages 899-1000). April 16, 2001, Volume 26, Number 8 (Pages 851-898). April 2, 2001, Volume 26, Number 7 (Pages ...
Before you buy Aussie Aussome Volume Non-Aerosol Hairspray, check out 375 Influenster reviews. Amanda W. said This works pretty good as long as you do not...
From the Klinik und Poliklinik für Neurologie, Kopf- und Neurozentrum, Universitätsklinikum Hamburg-Eppendorf, Hamburg, Germany (J.S., B. Cheng, C.G., G.T.); Centrum für Schlaganfallforschung Berlin, Charité-Universitätsmedizin Berlin, Berlin, Germany (M.E., J.B.F.); Klinik für Neurologie, Universität Erlangen-Nürnberg, Erlangen, Germany (M.K.); Department of Radiology, Athinoula A Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston (O.W.); Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea (D.-W.K.); Department of Neurology, University of California, Los Angeles (D.S.L.); Université de Bordeaux, CHU de Bordeaux, Service de NeuroImagerie Diagnostique de Thérapeutique, Bordeaux, France (T.T.); Klinik für Neurologie, Universitätsklinikum Frankfurt, Frankfurt, Germany (O.C.S.); Department of Medicine and Neurology, Melbourne Brain Centre at the Royal Melbourne Hospital, University ...
In patients with hematocrit of 60% or above the A blood viscosity is increased, and the tissue oxygenation is compromised. There is an increased incidence of cardiovascular complications. Immediate phlebotomy is often done, but if the red cell volume is not increased and the plasma volume and total blood volume are decreased, phlebotomy may be harmful. Twenty-five patients with hematocrits of 60% or above have been studied. Patients with clinical or laboratory evidence of dehydration are not included. Red cell volume was determined by chromium-51 and plasma volume by iodine-131 human serum. The expected red cell volume and plasma volume ...
The |i|Journal of Biomedical Optics|/i| (JBO) publishes peer-reviewed papers on the use of novel optical systems and techniques for improved health care and biomedical research.
Check out Cardinal Healths comprehensive portfolio of fluid management products. We offer families of products that allow you to meet the diverse needs of your facility and control the cost of doing business.
Fluid management is one of the workhorses of junior doctor prescribing; whether working on a surgical firm with a patient who is nil by mouth or with a dehydrated patient on a care of the elderly firm, this is a topic that one will be utilizing on a very regular basis.
A hypovolemia monitor comprises a plethysmograph input responsive to light intensity after absorption by fleshy tissue. A measurement of respiration-induced variation in the input is made. The measurement is normalized and converted into a hypovolemia parameter. An audible or visual indication of hypovolemia is provided, based upon the hypovolemia parameter.
The Volume Merge operation flattens the scalar data in a collection of volumes into a single base volume. This is useful for converting many overlapping volumes into one large volume for more efficient rendering. For example, you can stamp hundreds of thousands of volumes into a single volume for faster rendering, and flatten hierarchies into a low-res base. You can also create a Frustum volume that ensures only voxels in your cameras field of view are created.. ...
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l heard the phrase "its the principle of the thing." This phrase reminds us that in everything we do, including the clinical management of patients, there are both precedents and principles to guide our decision making processes. The principle of "doing the right thing" should be utilized in pediatric blood management and in making evidence based transfusion decisions.. Most of us are familiar with, and may well already be using, a Computerized Provider Order Entry (CPOE) system; which incorporates evidenced based practice (EBP) guidelines in an electronic order entry format. This EBP function is crucial in supporting the clinicians decision to transfuse, and how much, if any, blood product is appropriate. Decision support systems can also help in areas such as pediatric blood volume management and anemia management. Some pediatric blood conservation centers utilize Electronic Medical Record (EMR) systems to monitor other blood management considerations such as intake and output, utilizing the ...
PURPOSE: To use multimodal magnetic resonance imaging (MRI) to quantify treatment-induced changes in the whole volume of diffuse infiltrating pontine gliomas and correlate them with progression-free survival (PFS). METHODS AND MATERIALS: This prospective study included 22 children aged 3.3 to 14.7 years (median, 5.9 years). Multimodal MRI was performed at 3 distinct time points: before treatment, the first week following radiation therapy (RT), and 2 months after RT. The imaging protocol included morphologic, multi b-value diffusion; arterial spin labeling; and dynamic susceptibility contrast-enhanced perfusion. Morphologic and multimodal data-lesion volume, diffusion coefficients, relative cerebral blood flow, and relative cerebral blood volume (rCBV)-were recorded at the 3 aforementioned time points. The Wilcoxon test was used to compare each individual parameter variation between time points, and its correlation with PFS was assessed by the Spearman test. RESULTS: Following RT, the tumors ...
We appreciate the comments that Dr. Rossi expressed concerning our recent study (1)"Compensatory Changes in Atrial Volumes With Normal Aging: Is Atrial Enlargement Inevitable?" We are grateful to be given the chance to respond to the issues raised in the letter.. Our findings demonstrated that, in the younger age group, total left atrial volume change (passive emptying volume + conduit volume + active emptying volume) was approximately 60 ml per cardiac cycle. Thus, one may extrapolate that the left ventricular stroke volume in the absence of valvular regurgitation is approximately 60 ml. For a mean heart rate of 71 beats/min and body surface area (BSA) of 1.8 m2, the cardiac output would be 4.3 l/min or 2.4 l/min/m2, which is a reasonable estimate for the cardiac output of a normal young patient at rest. We agree with Dr. Rossi that correlating the left atrial volume estimation with cardiac output may be useful. However, we elected not to include the data, as insertion of a pulmonary artery ...
Management of diffuse low-grade glioma (DLGG) relies extensively on tumour volume estimation from MRI datasets. Two methods are currently clinically used to define this volume: the commonly used three-diameters solution and the more rarely used software-based volume reconstruction from the manual segmentations approach. The authors conducted an initial study of inter-practitioners variability of software-based manual segmentations on DLGGs MRI datasets. A panel of 13 experts from various specialties and years of experience delineated 12 DLGGs MRI scans. A statistical analysis on the segmented tumour volumes and pixels indicated that the individual practitioner, the years of experience and the specialty seem to have no significant impact on the segmentation of DLGGs. This is an interesting result as it had not yet been demonstrated and as it encourages cross-disciplinary collaboration. Their second study was with the three-diameters method, investigating its impact and that of the ...
In the operating room, the concept of supranormal oxygen transport values as a therapeutic goal has been validated in high-risk surgical patients. Several studies have shown that perioperative oxygen delivery maximization (which is proportional to cardiac output, hemoglobin and arterial oxygen saturation) in high-risk surgical patients decreases the length of stay in the ICU and in hospital, while decreasing morbidity and mortality. Moreover, several studies have demonstrated that perioperative cardiac output maximization is able to decrease the length of hospital stay and ICU admissions, and may influence long-term outcome.40 Most of these studies used colloid titration to increase cardiac output by leading patients to the plateau of the Frank-Starling curve. Cardiac output maximization was performed using cardiac output monitoring (the plateau of the Frank-Starling curve is achieved when cardiac output no longer increases after fluid challenge). However, a recent survey among North American ...
In days gone by, people relied on the CVP as a simple means of predicting fluid responsiveness. But it turns out the CVP is really bad at predicting the patients responsiveness to fluid challenges. There are too many variables governing central venous pressure. This has become evident from some high-quality evidence, and it has been known for some time. Indeed, so obvious the uselessness of CVP in this scenario, and so entrenched the practice of its use, that prominent authors have described a recent meta-analysis as a plea for common sense.
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Blood-oxygenation-level-dependent (BOLD) fMRI has contributions from venous oxygenation and venous cerebral blood volume (CBV) changes. To examine the relative contribution of venous CBV change (ΔCBV(v)) to BOLD fMRI, BOLD and arterial CBV changes (ΔCBV(a)) to a 40-s forepaw stimulation in six α-chloralose anesthetized rats were measured using a magnetization transfer-varied ...
Oxygenated haemoglobin, deoxyhaemoglobin and total blood volume are measured with our recently developed Near-Infrared Spectroscopy [NIRS] apparatus allowing in vivo non ..
The effect of Nembutal on the circulating and tissue blood volumes and hematocrits was calculated by means of independent determinations of plasma and red cell volumes. Nembutal produced an increase in circulating blood volume accompanied by a reduction in the venous hematocrit. The blood volumes of liver, kidney, spleen and intestine rose following the administration of Nembutal, while the hematocrits of liver, lung, intestine and muscle declined, and that of kidney rose. The administration of Nembutal to splenectomized mice produces similar changes. The relationship of these alterations to changes in periphero-vascular tone are discussed.. ...
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Volume. Length. 1cm. Length is measured in mm, cm, m or km. Area. 1cm. 1cm. 1cm 2. Area is measured in mm 2 , cm 2 , m 2 or km 2 3cm 8cm Area = length x width Area…
Williams, Scott (3 April 2002). "Blood Volume Determination". auntminnie.com. Retrieved 15 September 2016. Lombardi, Max H ( ...
... typically injected to aid in the determination of total blood and plasma volume. I-125 is a radioactive isotope of Iodine, it ...
"A method for the determination for the volume of blood in animals". The Journal of Physiology. 33 (6): 493-505. 1906. doi: ... with Johanne Christiansen & John Scott Haldane: "The absorption and dissociation of carbon dioxide by human blood". The Journal ...
American Journal of Anatomy, ISSN 0002-9106, 02/1908, Volume 7, Issue 4, pp. 469-487 Blood Urea Determinations in 211 Cases. ... The Anatomical Record, ISSN 0003-276X, 01/1910, Volume 4, Issue 1, pp. 23-47 The effect of contraction on the volume of the ... The Anatomical Record, ISSN 0003-276X, 07/1908, Volume 2, Issue 4, pp. 143-156 While traveling in Europe on the Sarah Berliner ... Biological Bulletin, ISSN 0006-3185, 01/1908, Volume 14, Issue 2, pp. 78-88 The structure of smooth muscle in the resting and ...
"Determination of volume of distribution for ethanol in male and female subjects". Journal of Analytical Toxicology. 20 (5): 287 ... Blood alcohol content (BAC), also called blood alcohol concentration, blood ethanol concentration, or blood alcohol level, is ... Each is defined as either a mass of alcohol per volume of blood or a mass of alcohol per mass of blood (never a volume per ... Blood alcohol concentration is usually expressed as a percentage of ethanol in the blood in units of mass of alcohol per volume ...
... blood tests). Sometimes arterial blood gas measurements are also required. Spirometry the determination of maximum airflow at a ... Pulmonary Function Tests spirometry, as above, plus response to bronchodilators, lung volumes, and diffusion capacity, the ... Originally, it was thought that blood reaching the right side of the heart passed through small 'pores' in the septum into the ... He believed that the blood must have passed through the pulmonary artery, through the lungs, and back into the heart to be ...
Volume 3, Number One (1 May 1994) Wilkinson, Charles. Blood Struggle: The Rise of Modern Indian Nations. Boston: W. W. Norton ... Blood Struggle, p. 103. Wilkinson, Charles. Blood Struggle, p. 104 Wilkinson, Charles. Blood Struggle, p. 128 Hagan, William T ... rights Self-determination Self-determination of Australian Aborigines Tribal sovereignty African-American self-determination ... the movement for self-determination gained strength. Self-determination was not official federal government policy until 1970, ...
2003). "Noninvasive measurement of regional cerebral blood flow and regional cerebral blood volume by near-infrared ... and activity of specific regions of the brain by continuously monitoring blood hemoglobin levels through the determination of ... NIRS can be used to quantify blood flow, blood volume, oxygen consumption, reoxygenation rates and muscle recovery time in ... When a specific area of the brain is activated, the localized blood volume in that area changes quickly. Optical imaging can ...
... and determinations of Blood to the Head". 'Statics' made some important contributions to the understanding of lung volume. ... J. Jeffreys, Views upon the statics of the human chest, animal heat, and determinations of blood to the head. London 1843. ... D. Zuck, Julius Jeffreys and the Physiology of Lung Volumes, Proc. History of Anaesthesia Society - June 1990, Vol. 8b, pp55-61 ... David Zuck's 1991 article "Julius Jeffreys and the Physiology of Lung Volumes" he concluded that Julius was the first physician ...
A system of blood analysis. Supplement II. Simplified method for the determination of chlorides in blood or plasma. *Journal of ... p. 127 Wiley Encyclopedia of inorganic chemistry: Volume 4, p. 1704: Chen et al.: United States Patent 5518131 - "Etching ... Cryogenics, *Volume 39, Number 4, (1999) , p. 319-322 J. C. Whitehorn: ...
... of red blood cells has been used as a means of determining total blood volume without the use of radiolabels such ... allowing volume determinations in low birth weight infants and pregnant women who could not otherwise be exposed to the ...
Determination of blood type for blood transfusion or transplants. *Blood cultures are commonly taken if infection is suspected ... Full blood count (or "complete blood count"). *Hematocrit. *MCV ("mean corpuscular volume") ... Typical clinical blood panels include a basic metabolic panel or a complete blood count. Blood tests are also used in drug ... Complete Blood Count (UK: Full Blood Count). Analysis of 15 different blood test readings to provide information about overall ...
... is the volume of blood plasma that is cleared of solute-free water per unit time. An example of its use is in the determination ... How rapidly the kidney clears the blood plasma of a substance (be it water or solute) is the renal clearance, which is related ... as the kidney usually produces concentrated urine except in the cases of volume overload by the individual. At its simplest, ...
"Determination of selenium in blood serum by proton-induced X-ray emission". Analytical Chemistry. 49 (9): 1313-5. PMC 883617 . ... Jinkins JR (June 2013). "Large volume full columnar lumbar myelography". Neuroradiology. 29 (4): 371-3. PMC 3627420 . Berti M, ... It is the first transcription factor required for determination of osteoblast commitment, followed by Sp7 and Wnt-signaling. ...
... blood pressure monitoring, ambulatory MeSH E01.370.370.150 --- blood volume determination MeSH E01.370.370.170 --- capillary ... blood circulation time MeSH E01.370.370.130 --- blood flow velocity MeSH E01.370.370.140 --- blood pressure determination MeSH ... blood glucose self-monitoring MeSH E01.450.150.100.110 --- blood protein electrophoresis MeSH E01.450.150.100.115 --- blood ... whole blood coagulation time MeSH E01.450.375.120 --- blood grouping and crossmatching MeSH E01.450.375.125 --- blood ...
Alveolar dead space is sum of the volumes of those alveoli which have little or no blood flowing through their adjacent ... During strenuous exercise, CO2 will rise throughout the exhalation and may not be easily matched to a blood gas determination, ... is the tidal volume; P a C O 2 {\displaystyle P_{\,a\,CO_{2}}} is the partial pressure of carbon dioxide in the arterial blood ... which led to serious errors of interpretation early in the history of dead space determinations. Example: For a tidal volume of ...
... which is a device used to find the quantity of platelets in a specified volume of blood. This device is named in conjunction ... an instrument used for colorimetric determination of the blood's hemoglobin content. His name is also associated with the " ... "Sahli pipette method" for performing red blood cell counts, as well as the "Hayem-Sahli hemocytometer", ...
... venous and capillary blood, of which only arterial blood was relevant to oxygen measurement. Millikan's own solution to these ... Volume 2, Number 4, pp. 270-288. doi:10.1007/BF02851177. Zijlstra, Willem G. et al. (2000). Visible and near infrared ... absorption spectra of human and animal haemoglobin: determination and application. VSP. ISBN 90-6764-317-3. Albert F. Gunns ( ... Severinghaus, John W.; Astrup, Poul B. (1986). History of blood gas analysis. VI. Oximetry. Journal of Clinical Monitoring and ...
... at the Philipps University of Marburg with a thesis on the development of a device for the automated determination of blood ... For manual dosing of small volumes in the field of biomedical research, clinical chemistry, and the environmental and food ... he worked on large amounts of chromatography samples with a volume of less than a milliliter for further analysis. At that time ...
Genetic determination of blood pressure is strong, but does not explain all of the variance. Familial Parkinson's disease (PD) ... Tasman (1 May 1991). American Psychiatric Press Review of Psychiatry, Volume 10. American Psychiatric Pub. pp. 83-. ISBN 978-0- ... In several studies the parent-child and sibling-sibling correlations of blood pressure are approximately .24. ...
In the first volume, Karin bites Fumio, injecting her blood and leaving Fumio cheery, energetic, and with a great increase in ... It was also revealed that despite being one of the most mild-mannered vampires, Henry's inherent determination to protect his ... Her husband, James Maaka's blood preference was "young" blood, which Elda collected for him since he harmed humans if he bit ... However, instead of having to drink blood like normal vampires, Karin's body overproduces blood. Generally, once a month she ...
Helv Med Acta 13:328-332, 1946 Riley RL, Lilienthal JL Jr, Proemmel DD, et al: On the determination of the physiologically ... Am J Physiol 147:191-198, 1946 McNicol MW, Campbell EJM: Severity of respiratory failure: arterial blood gases in untreated ... and VD/VT is the ratio of physiologic dead space over tidal volume. R = P E C O 2 ( 1 − F I O 2 ) P i O 2 − P E O 2 − ( P E C O ... The equation is used in assessing if the lungs are properly transferring oxygen into the blood. The alveolar air equation is ...
"Mud, Blood and Determination. The History of the 46th (North Midland) Division in the Great War". Wolverhampton Military ... volume V, London, HMSO, 1947 Walker, Jonathan (1998). "The Blood Tub. General Gough and the Battle of Bullecourt, 1917". E and ... Edmonds, ed., Sir John (1947). Military Operations: France and Belgium 1918, volume IV. London: HMSO. CS1 maint: Extra text: ...
Common hormonal test include determination of FSH and testosterone levels. A blood sample can reveal genetic causes of ... The volume of the semen sample, approximate number of total sperm cells, sperm motility/forward progression, and % of sperm ... Risk factors for the formation of antisperm antibodies in men include the breakdown of the blood‑testis barrier, trauma and ... The provider may order blood tests to look for hormone imbalances, medical conditions, or genetic issues. The history should ...
Blood irradiation therapy Klassen, J (2010). "The role of photopheresis in the treatment of graft-versus-host disease". Current ... "National Coverage Determination (NCD) for Extracorporeal Photopheresis (110.4)". Medicare Coverage Database. Centers for ... Minimal observed side effects for patients receiving photopheresis include hypotension and syncope resulting from volume shifts ... Specifically, buffy coat (WBC + platelets) is separated from whole blood, chemically treated with 8-methoxypsoralen (instilled ...
High-speed or superspeed centrifuges can handle larger sample volumes, from a few tens of millilitres to several litres. ... In addition to purification, analytical ultracentrifugation (AUC) can be used for determination of the properties of ... Separation of urine components and blood components in forensic and research laboratories ... Microcentrifuges are used to process small volumes of biological molecules, cells, or nuclei. Microcentrifuge tubes generally ...
Plasma and blood volume determination.. Evans blue dye (T-1824) dilution was used to measure plasma volume before exercise on ... Figure 4B shows the percent changes in blood volume from preexercise to 0, 30, 60, and 90 min postexercise. Blood volume was ... Preexercise blood volume was calculated from plasma volume and hematocrit. Exercise and postexercise changes in blood and ... Body Weights, Plasma Volume and Blood Volume. Total body water loss.. Subjects were weighed pre- and postexercise in the same ...
Determination of Blood Volume and Its Application to Regional Perfusion in Chemotherapy Lead researcher. V C Marshall ...
Correlation of MR imaging-determined cerebral blood volume maps with histologic and angiographic determination of vascularity ... Objective: Our purpose was to evaluate the relationships between the ratio of maximum relative cerebral blood volume (rCBV) ( ...
Blood Pressure Monitoring, Ambulatory -- WB 280 *Blood Volume Determination -- WG 141 *Bone Malalignment -- WE 225 ... At WQ 202, the caption was changed from Diagnosis to Pregnancy determination. ...
The effects of blood electrolyte composition change which result in a change of light beam geometry are eliminated by the ... based on registration of blood hemoglobin concentration, during long periods of time, such as dialysis session. A method and ... non colinear configuration at a sufficient angle to substantially eliminate the scattering properties of the blood. A primary ... A method and device for the continuous real-time monitoring of relative blood volume change, ...
Blood volume determinations. Do. Rose Bengal. Liver function studies. Do. Iodopyracet, sodium iodohippurate, sodium diatrizoate ... In many instances a determination can readily be made as to the applicability of a drug efficacy notice by an individual who is ... ii) The preparation is so packaged as to volume and type of container as to afford adequate protection and be suitable for self ... a) Hypophosphatemia is a condition in which an abnormally low plasma level of phosphate occurs in the blood. This condition is ...
Susceptibility contrast magnetic resonance imaging determination of fractional tumor blood volume: A noninvasive imaging ... Susceptibility contrast magnetic resonance imaging determination of fractional tumor blood volume: A noninvasive imaging ... Purpose: To assess tumor fractional blood volume (xi), determined in vivo by susceptibility contrast magnetic resonance imaging ... providing validation of the MRI-derived measurements of fractional tumor blood volume. Conclusions: These data clearly ...
Blood volume determination in the mouse. J Physiol (Lond). 1973;228(2):279-284.. View this article via: CrossRef Google Scholar ... Identification of rEos-like and iEos-like eosinophils in the blood of naive and HDM-treated C57BL/6 mice. White blood cells ... Indeed, beads administered locally via the airways were taken up by lung rEos but not by blood monocytes or blood eosinophils ( ... and survival in the blood in response to different inflammatory stimuli (1, 8, 9, 51). Yet, basal blood eosinophil numbers ...
Blood Volume Determination. Method for determining the circulating blood volume by introducing a known quantity of foreign ... Cardiac Volume. The volume of the HEART, usually relating to the volume of BLOOD contained within it at various periods of the ... The volume of packed RED BLOOD CELLS in a blood specimen. The volume is measured by centrifugation in a tube with graduated ... Volume of circulating BLOOD. It is the sum of the PLASMA VOLUME and ERYTHROCYTE VOLUME. ...
Are you bleeding? Validation of a machinelearning algorithm for determination of blood volume status: application to remote ... Are you bleeding? Validation of a machinelearning algorithm for determination of blood volume status: application to remote ... Family history of premature cardiovascular disease: blood pressure control and longterm mortality outcomes in hypertensive ... Family history of premature cardiovascular disease: blood pressure control and longterm mortality outcomes in hypertensive ...
Blood volume determination in the mouse. J Physiol. 1973;228(2):279-284. ... Blood samples (50 µL) were collected from the retro-orbital venous plexus 3 h later, as has been previously described.11 Plasma ... Your Name) has forwarded a page to you from Blood Journal Message Body (Your Name) thought you would be interested in this ... Volume: 130. Issue: 11. Pages: 1364-1374. DOI: https://doi.org/10.1182/blood-2017-04-780205 ...
The Blood Volume in the Lower Extremities: A Technique for Its Determination Utilizing Cr-51 Tagged Red Cells. Adams, John P.; ... Biochemical Investigations of Deer Antler Growth: Part I. Alterations of Deer Blood Chemistry Resulting from Antlerogenesis. ...
Determination of circulating blood volume by continuously monitoring hematocrit during hemodialysis.. Leypoldt JK, Cheung AK, ... Hematocrit as an indicator of blood volume and a predictor of intradialytic morbid events. ...
Rychter, Z., Kopecky, M., & Lemez, L. (1955). A micromethod for determination of the circulating blood volume in chick embryos ... Shear Stress on Blood Vessels. To analyze the flow within a blood vessel, it is useful to start with a simplified model of ... Blood Rheology. One way to model the non-Newtonian properties of the blood is to consider it as a generalized Newtonian fluid, ... Of special importance in developmental physiology is the shear stress imposed by blood flow on the walls of blood vessels, ...
Fundamentals and applications for blood flow and heart volume determination. Stuttgart: Thieme 1971Google Scholar ... Lange, P., Farr, F., Onnasch, D., Heintzen, P. H.: Factors affecting the accuracy of ventricular volume determination. In: ... On-line processing of the video-image for left ventricular volume determination. Comput. biomed. Res. 4, 474-485 (1971)Google ... Thereby right and left ventricular volume, shape and contraction pattern can be quantitated and used to characterize the ...
Williams, Scott (3 April 2002). "Blood Volume Determination". auntminnie.com. Retrieved 15 September 2016. Lombardi, Max H ( ...
... blood samples were collected for packed cell volume (PCV) determination. Individual FECs were performed every seven days from ... Blood samples were collected at days 0 and 7 of the third parasitic challenge. RNA was extracted from tissue and blood samples ... Blood samples were collected in PAXgene Blood RNA tubes (Preanalytix, Valencia, USA) at D0 and D7 of the third parasitic ... Blood samples collected in PAXgene tubes were submitted to RNA extraction using the PAXgene Blood RNA Kit (Preanalytix), ...
Hbmass and blood volume were meas-ured using the optimized CO-rebreathing technique, VO2max by an incremental test on a ... Hbmass and blood volume were meas-ured using the optimized CO-rebreathing technique, VO2max by an incremental test on a ... children with a weekly training volume of more than 4 h show a 7% higher Hbmass than untrained children. Although this training ... children with a weekly training volume of more than 4 h show a 7% higher Hbmass than untrained children. Although this training ...
We aim to assess the spatial distribution of blood volume (BV) in whole lung tumours in patients undergoing radiotherapy using ... Blood Volume Determination / methods* * Blood Volume Determination / statistics & numerical data * Carcinoma, Non-Small-Cell ... We aim to assess the spatial distribution of blood volume (BV) in whole lung tumours in patients undergoing radiotherapy using ... Given the slice-by-slice variation in blood volume, our results demonstrate that whole tumour DCE-CT measurements are more ...
Relative Blood Volume Changes Following the Use of Intravenous Glucose Injections in Pneumonia1 JOHN H. L. HEINTZELMAN, M. D. ... Relative Blood Volume Changes Following the Use of Intravenous Glucose Injections in Pneumonia1. Ann Intern Med. ;4:1336-1339. ... Two writers state that there is no change in the blood volume following glucose injections37. Such investigations have been ... A review of the literature on the subject of blood volume changes following intravenous injections of hypertonic glucose ...
Advanced forms of the invention correct for proximity of blood-vessel walls. This system is particularly compatible with ... and blood-vessel walls) and transmit this reflected light back through the catheter to respective detectors outside the ... Sensor calibration and blood volume determination US7734322B2 (en) 1997-10-14. 2010-06-08. Transonic Systems, Inc.. Blood ... Sensor calibration and blood volume determination US6041246A (en) * 1997-10-14. 2000-03-21. Transonic Systems, Inc.. Single ...
... blood volume and other indicators of cardiovascular health. ... Sensor calibration and blood volume determination US6746407B2 ( ... Blood volume measures the amount of blood present in the cardiovascular system. Blood volume is also a diagnostic measure which ... Blood volume calculations. In some embodiments, blood volume may be measured independently or in addition to the cardiac output ... General methods of measuring blood volume are known in the art. In some embodiments, circulating blood volume may be measured ...
Determination of the standard value of circulating blood volume during anesthesia using ... ... PURPOSE: The standard value for circulating blood volume (BV) during anesthesia was determined by a multicenter study in Japan ... Abnormally increased physiologic deadspace volume (Vd(phys)), consisting of alveolar deadspace volume and airway deadspace ... tidal volume, blood pressure, and heart rate, were maintained within physiological ... ...
The blood introduction end of the tube is left uncoated to promote capillary action in blood sampling. The coating may include ... a colorant for staining blood cells, a phagocytic substance for examining phagocytosis of leucocyte, etc. ... Capillary tubes of the double open-ended type used for blood collection and examination are provided over a portion of their ... Material layer volume determination. US4190328 *. Dec 1, 1978. Feb 26, 1980. Levine Robert A. Process for detection of blood- ...
Burge CM, Skinner SL (1995) Determination of hemoglobin mass and blood volume with CO: evaluation and application of a method. ... Dill DB, Costill DL (1974) Calculation of percentage changes in volumes of blood, plasma, and red cells in dehydration. J Appl ... Thomsen JK, Fogh-Andersen N, Bulow K, Devantier A (1991) Blood and plasma volumes determined by carbon monoxide gas, 99mTc- ... Schmidt W, Maassen N, Trost F, Boning D (1988) Training induced effects on blood volume, erythrocyte turnover and haemoglobin ...
  • Although SE rCBV imaging is selectively sensitive to signal intensity changes from the microvasculature (ie, capillary level blood volume), GRE rCBV imaging is sensitive to signal intensity changes from the larger vessels as well ( 15 - 18 ). (ajnr.org)
  • This process is crucial for many biological structures, such as blood vessels, to develop correctly, and is also a key part of our senses of touch and hearing. (elifesciences.org)
  • Red blood cells experience significant forces when they pass through narrow blood vessels. (elifesciences.org)
  • Further, rates at which cells pass through vessels is used to determine blood vessel patency and platelet aggregation. (google.com)
  • 18. A method of claim 16 wherein the rate at which the cyanine dye-labelled red blood cells flow through blood vessels is measured. (google.com)
  • 21. A method of claim 20 wherein aggregates of cvanine dye-labelled platelets are detected in retinal blood vessels. (google.com)
  • This study aimed to investigate the anatomic configuration of the blood vessels that contribute to portal vein tumor thrombus (PVTT), a common complication of hepatocellular carcinoma, in VX2 rabbits. (dovepress.com)
  • Liver biopsies may be taken percutaneously (via a needle through the skin), transvenously (through the blood vessels), endoscopically (through endoscopic ultrasound fine needle biopsy), or directly during abdominal surgery. (wikipedia.org)
  • Symptoms of mild hypothermia may be vague, with sympathetic nervous system excitation (shivering, high blood pressure, fast heart rate, fast respiratory rate, and contraction of blood vessels). (wikipedia.org)
  • Surface blood vessels contract further as the body focuses its remaining resources on keeping the vital organs warm. (wikipedia.org)
  • In a compensated state, blood vessels supplying less-ventilated areas of the lung may selectively contract, to redirect the blood to areas of the lungs which are better ventilated. (wikipedia.org)
  • Combretastatin A-4 is the active component of combretastatin A-4 phosphate, a prodrug designed to damage the vasculature (blood vessels) of cancer tumors causing central necrosis. (wikipedia.org)
  • Smooth muscle cells in the tunica media of many blood vessels also produce IL-6 as a pro-inflammatory cytokine. (wikipedia.org)
  • In these models, EETs prevent arterial occlusive diseases such as heart attacks and brain strokes not only by their anti-hypertension action but possibly also by their anti-inflammatory effects on blood vessels, their inhibition of platelet activation and thereby blood clotting, and/or their promotion of pro-fibrinolytic removal of blood clots. (wikipedia.org)
  • Diffusing capacity of the lung (DL) measures the transfer of gas from air in the lung, to the red blood cells in lung blood vessels. (wikipedia.org)
  • Our purpose was to evaluate the relationships between the ratio of maximum relative cerebral blood volume (rCBV) (rCBV ratio = rCBV[tumor]/rCBV[contralateral white matter]) and histologic and angiographic vascularities of gliomas using the gradient-echo echoplanar MR imaging technique. (nih.gov)
  • Relative cerebral blood volume (rCBV) measurements derived from perfusion MR imaging and metabolite ratios from proton MR spectroscopy are useful in predicting glioma grade. (ajnr.org)
  • As reported elsewhere ( 4 ), the results in most of these studies concerning the relationship between relative cerebral blood volume (rCBV) and glial tumor grade or different tumor types have been obtained by experienced radiologists working in a research environment on selected predefined disease entities, usually by using home-made software for postprocessing of raw perfusion data. (ajnr.org)
  • The MR imaging characteristics of oligodendrogliomas and astrocytomas on spin-echo (SE), echo-planar relative cerebral blood volume (rCBV) maps, to our knowledge, have not previously been emphasized. (ajnr.org)
  • Both dynamic susceptibility spin-echo (SE) and gradient-echo (GRE) MR perfusion imaging have shown promise in grading astrocytomas based on their relative cerebral blood volume (rCBV), although the use of SE rCBV imaging has not been as well emphasized in the literature ( 11 - 15 ). (ajnr.org)
  • DSC MR imaging-derived relative cerebral blood volume (rCBV) measurements have been shown to correlate with glioma grade and conventional angiographic vascularity, and indirectly with tumor angiogenesis and biologic aggressiveness ( 5 - 8 ). (ajnr.org)
  • Principles around accurate blood volume collection using capillary action. (bioportfolio.com)
  • art ' for volume accuracy and precision but dimension of height and radius must be carefully chosen in order to exploit the capillary action behaviour efficiently. (bioportfolio.com)
  • This article investigates the influence of surface glass aging, due to prolonged exposure to humid air, and hematocrit level, on the blood capillary rise. (bioportfolio.com)
  • It provides also the tools to correctly define the optimum capillary dimensions to collect an accurate volume of blood in a glass capillary. (bioportfolio.com)
  • Capillary rather than venipuncture may be a simpler and less invasive blood collection protocol that would increase the number of potential sampling tests. (bioportfolio.com)
  • Capillary tubes of the double open-ended type used for blood collection and examination are provided over a portion of their internal surfaces with a dry coating of a reagent, e.g., a colorant for staining blood cells, a phagocytic substance for examining phagocytosis of leucocyte, etc. (google.com)
  • The blood introduction end of the tube is left uncoated to promote capillary action in blood sampling. (google.com)
  • Primary Examinerl(yle L. Howell Attorney, Agent, or FirmKemon, Palmer and Estabrook [5 ABSTRACT Capillary tubes of the double open-ended type used for blood collection and examination are provided over a portion of their internal surfaces with a dry coating of a reagent, e.g., a colorant for staining blood cells, a phagocytic substance for examining phagocytosis of leucocyte, etc. (google.com)
  • a 1 CAPILLARY TUBE FOR BLOOD EXAMINATION This invention relates to a capillary tube for use in staining cells and bacteria for observation and in a phagocytosis test of blood corpuscles or leucocyte. (google.com)
  • The enhancement pattern of a tumor on conventional MR imaging is not always reliable to obtain precise information about tumor angiogenesis at the capillary level, because tumoral enhancement is mainly due to the disruption of blood-brain barrier (BBB) rather than the tumoral vascular proliferation itself ( 12 , 13 ). (ajnr.org)
  • It is equal to its concentration in arterial blood since CO2 rapidly equilibrates across the alveolar-capillary membrane. (wikipedia.org)
  • The diffusion capacity for oxygen ( D L O 2 ) {\displaystyle (D_{L_{O_{2}}})} is the proportionality factor relating the rate of oxygen uptake into the lung to the oxygen gradient between the capillary blood and the alveoli (per Fick's laws of diffusion). (wikipedia.org)
  • Further, the oxygen concentration (partial pressure) in the pulmonary artery is taken to be representative of capillary blood. (wikipedia.org)
  • The microdialysis probe is designed to mimic a blood capillary and consists of a shaft with a semipermeable hollow fiber membrane at its tip, which is connected to inlet and outlet tubing. (wikipedia.org)
  • A differential white cell count is done by staining a smear of the patient's blood with a Wright's stain, allowing the different types of white cells to be clearly seen under the microscope. (encyclopedia.com)
  • Relative blood volume monitoring (BVM) is based on the concept that the hematocrit increases with UF, relative to the patient's baseline hematocrit. (biomedcentral.com)
  • UF during HD leads to a fall in the patient's blood volume. (biomedcentral.com)
  • The Blood Infusion Control System of the present invention integrates components of rapid infusion systems with a computer controller designed to synchronize two infusion pumps in a manner that produces a pre-selected patient hematocrit (HCT*) while reporting the patient's estimated blood volume (BVE). (google.de)
  • The patient's estimated blood volume is extrapolated from hematocrit changes in response to the fluid and blood infusion. (google.de)
  • This subject invention is a sample data control system that rapidly dispenses crystalloid/colloid fluids and red blood cells by venous infusion in a manner that 1) achieves HCT* in the patient and 2) reports the patient's BV E . BICS could enhance the ability of clinical teams in operating rooms and trauma receiving areas to stabilize patients suffering cardiovascular deterioration from acute blood loss. (google.de)
  • a controller for controlling the operation of said first and second infusion pumps to regulate the flowrates of said first and second physiologic fluids being propelled by said first and second infusion pumps, said controller synchronizing the flowrate of said first and second infusion pumps to control the total flowrate of said first and second infusion pumps in response to a patient's hematocrit levels and blood volume. (google.de)
  • In accordance with the disclosed subject matter, the level of the analyte of interest in the medium from which the modified specimen was obtained (e.g., from a patient's blood) is determined based on the level of an analyte in a solution formed from the modified specimen and on the level of at least one normalizing analyte. (patentgenius.com)
  • In subsequent blood samples, the patient's own A and B blood cells are removed by agglutination with either anti-A or anti-B serum. (wikipedia.org)
  • Organized into 43 chapters, this compilation of papers begins with an overview of the origin of the notion of a vasomotor center controlling the arterial blood pressure. (elsevier.com)
  • 90 mm Hg) are still considered to be the best indicators of the need for life-saving interventions, (4-6) even though the unreliability of arterial blood pressure as an indicator of blood loss was recognized as early as World War II. (thefreelibrary.com)
  • Nexfin beat-to-beat arterial blood pressure monitoring enables continuous assessment of hemodynamic indices like cardiac index (CI), pulse pressure variation (PPV) and stroke volume variation (SVV) in the perioperative setting. (springer.com)
  • Hemodynamic parameters included arterial blood pressure (MAP), CI, PPV and SVV. (springer.com)
  • Parmi les autres facteurs affectant la réponse hémodynamique, citons la pharmacodynamie des médicaments vasoactifs courants, ce qui met encore plus en évidence la complexité de la régulation du retour veineux pendant une perfusion de catécholamines exogènes. (springer.com)
  • Improved perfusion MR imaging assessment of intracerebral tumor blood volume and antiangiogenic therapy efficacy in a rat model with ferumoxytol. (healthtap.com)
  • The diffusing capacity does not directly measure the primary cause of hypoxemia, or low blood oxygen, namely mismatch of ventilation to perfusion: Not all pulmonary arterial blood goes to areas of the lung where gas exchange can occur (the anatomic or physiologic shunts), and this poorly oxygenated blood rejoins the well oxygenated blood from healthy lung in the pulmonary vein. (wikipedia.org)
  • We have therefore chosen to organize this chapter by test, as one would see on a typical PFT result sheet: spirometry, lung volumes, diffusing capacity, and bronchoprovocation. (springer.com)
  • Results: Irrespective of treatment, tumor volume significantly increased over 24 hours. (icr.ac.uk)
  • A significant positive correlation between posttreatment xi and Hoechst 33342 uptake was obtained (r = 0.83, p = 0.002), providing validation of the MRI-derived measurements of fractional tumor blood volume. (icr.ac.uk)
  • Conclusions: These data clearly highlight the potential of susceptibility contrast MRI with ultrasmall superparamagnetic iron oxide contrast agents to provide quantitative imaging biomarkers of fractional tumor blood volume at high spatial resolution to assess tumor vascular status and response to vascular disrupting agents. (icr.ac.uk)
  • We hypothesized that tumor blood-volume measurements, derived from DSC MR imaging, would help differentiate the two on the basis of differences in tumor vascularity. (ajnr.org)
  • The purpose of our study was to investigate DSC MR imaging characteristics of the two most common subtypes of low-grade infiltrating glioma-astrocytoma and oligodendroglioma-to test the hypothesis that tumor blood-volume measurements derived from DSC MR imaging would differentiate the two on the basis of differences in tumor vascularity. (ajnr.org)
  • Aronen HJ, Gazit IE, Louis DN et al (1994) Cerebral blood volume maps of gliomas: comparison with tumor grade and histologic findings. (springer.com)
  • The principle of "one sample application, multiple determinations", assay configuration, and mechanics for placing absorbent dots described in the paper and patents should be generally applicable to different kinds of microarrays. (wikipedia.org)
  • Their first product in development was an assay, termed "immunosorbent cytometry", which could be employed to monitor the immune status, i.e., the concentrations and ratios of CD3+, CD4+, and CD8+ T cells, in the blood of HIV-infected individuals. (wikipedia.org)
  • neutral red pinacyanol+ neutral red Various methods for staining cells such as blood corpuscles etc. have been known. (google.com)
  • It involves determining the numbers, concentrations, and conditions of the different types of blood cells. (encyclopedia.com)
  • The CBC also measures the hemoglobin content and the packed cell volume ( hematocrit ) of the red blood cells, assesses the size and shape of the red blood cells, and determines the types and percentages of white blood cells. (encyclopedia.com)
  • Most laboratories routinely use some type of automated equipment to dilute the blood, sample a measured volume of the diluted suspension, and count the cells in that volume. (encyclopedia.com)
  • Technologists then examine a stained blood smear under the microscope to identify any abnormalities in the appearance of the red blood cells and to report the types and percentages of white blood cells observed. (encyclopedia.com)
  • The red blood cell (RBC) count determines the total number of red cells (erythrocytes) in a sample of blood. (encyclopedia.com)
  • Hemoglobin (Hgb) is the protein-iron compound in the red blood cells that enables them to transport oxygen. (encyclopedia.com)
  • Also closely tied to the RBC and hemoglobin values is the hematocrit (Hct), which measures the percentage of red blood cells in the total blood volume. (encyclopedia.com)
  • Red blood cell indices provide information about the size and hemoglobin content of the red cells. (encyclopedia.com)
  • The white blood cell (WBC) count determines the total number of white cells (leukocytes) in the blood sample. (encyclopedia.com)
  • A technologist then counts a minimum of 100 WBCs and reports each type of white cell as a percentage of the total white blood cells counted. (encyclopedia.com)
  • Red blood cells (RBCs) experience significant mechanical forces while recirculating, but the consequences of these forces are not fully understood. (elifesciences.org)
  • In a disease called xerocytosis, the red blood cells become severely dehydrated and shrink. (elifesciences.org)
  • This suggested that Piezo1 may regulate the volume of red blood cells. (elifesciences.org)
  • including some of the researchers who worked on the 2010 and 2013 studies-have now investigated the role of Piezo1 in red blood cells in more detail. (elifesciences.org)
  • Applying strong forces to red blood cells from mice caused calcium to rapidly enter cells through Piezo1 channels. (elifesciences.org)
  • then deleted the Piezo1 gene from red blood cells. (elifesciences.org)
  • Mammalian red blood cells (RBCs) are rather unique in that they lack a nucleus and many organelles and that they traverse the circulatory system several hundred thousand times in their life cycle. (elifesciences.org)
  • one of the formed elements in the peripheral blood , constituting the great majority of the cells in the blood. (thefreedictionary.com)
  • Erythrocytes are stored in the spleen, which acts as a reservoir for the blood system and discharges the cells into the blood as required. (thefreedictionary.com)
  • About 180 million red blood cells are destroyed every minute. (thefreedictionary.com)
  • Since the number of cells in the blood remains more or less constant, this means that about 180 million red blood cells are manufactured every minute. (thefreedictionary.com)
  • A radioactive substance, usually chromium, is used to "tag" cells of a sample of blood drawn from the patient. (thefreedictionary.com)
  • 16. A method of claim 1 wherein the cyanine dye-labelled cells are red blood cells. (google.com)
  • 17. A method of claim 16 wherein the subject's retina is examined for presence of cyanine dye-labelled red blood cells to detect retinopathv or blood vessel degeneration. (google.com)
  • method for determining the number of red (erythrocytes) and white (leukocytes) blood cells in a certain volume of blood. (thefreedictionary.com)
  • Leukemia, for instance, causes an increase in the white blood cell count, while a decrease in the number of red blood cells is associated with anemia. (thefreedictionary.com)
  • A determination of the percentage of various types of white blood cells (neutrophils, lymphocytes, eosinophils, basophils, and monocytes) is called a differential blood count. (thefreedictionary.com)
  • Determination of the number of white and red blood cells in a definite volume of blood. (thefreedictionary.com)
  • Albumin is responsible for much of the colloidal osmotic pressure of the blood, and thus is a very important factor in regulating the exchange of water between the plasma and the interstitial compartment (space between the cells). (thefreedictionary.com)
  • Peripheral blood mononuclear cells (MNCs) were isolated and labeled using superparamagnetic iron oxide particles in vitro. (dovepress.com)
  • in red blood cells. (scielo.br)
  • The steep increase in conductivity seen beat to beat is attributed to the orientation of red blood cells. (wikipedia.org)
  • When the electric current is then applied, it is able to easily pass the red blood cells in the aorta resulting in a lower voltage, and thus, a higher conductivity. (wikipedia.org)
  • The change from random orientation to alignment of red blood cells upon opening of aortic valve generates a characteristic steep increase of conductivity or dZ(t) (corresponding to a steep decrease of impedance) - beat to beat. (wikipedia.org)
  • They can also regulate internal functions of our body including, but not limited to, osmotic pressure in cells, blood pressure in veins and arteries, micturition, and heart electrophysiology and contractility. (wikipedia.org)
  • For each of the four main WBC populations: Neutrophils, Lymphocytes, Monocytes and Eosinophils, there are six values displayed about the Coordinates of these Cells in three-dimensional spaces: 1) Volume Mean and Standard deviation 2) Conductivity Mean and Standard deviation 3) Scatter Mean and Standard deviation. (wikipedia.org)
  • In addition, where Blood cells are not seen under normal circumstances, as myelocytes (Immature Neutrophil), results in these data frequently become abnormal. (wikipedia.org)
  • Hypoxemia is usually defined in terms of reduced partial pressure of oxygen (mm Hg) in arterial blood, but also in terms of reduced content of oxygen (ml oxygen per dl blood) or percentage saturation of hemoglobin (the oxygen binding protein within red blood cells) with oxygen, which is either found singly or in combination. (wikipedia.org)
  • It contains hemocyanin, a copper-based protein that turns blue in color when oxygenated, instead of the iron-based hemoglobin in red blood cells found in vertebrates, thus giving hemolymph a blue-green color rather than the red color of vertebrate blood. (wikipedia.org)
  • These global hematopoietic cells from donors or cord blood units are used to transplant patients around the world with a variety of with life-threatening blood disorders such as leukemia, lymphoma, aplastic anemia, as well as certain immune system and metabolic disorders. (wikipedia.org)
  • The Ashby technique is a method for determining the volume and life span of red blood cells in humans, first published by Dr. Winifred Ashby in 1919. (wikipedia.org)
  • The technique involves injection of compatible donor red blood cells of a different blood group into a recipient, followed by blood testing periodically afterwards. (wikipedia.org)
  • The number of remaining nonagglutinated Type O cells as a function of time defines the survival rate of blood cells. (wikipedia.org)
  • HT has been utilized for the study of red blood cells, white blood cells, malaria infection, bebasia infection, blood storage, and diabetes. (wikipedia.org)
  • Reticulocytes are immature red blood cells, typically composing about 1% of the red blood cells in the human body. (wikipedia.org)
  • In the process of erythropoiesis (red blood cell formation), reticulocytes develop and mature in the bone marrow and then circulate for about a day in the blood stream before developing into mature red blood cells. (wikipedia.org)
  • Like mature red blood cells, in mammals reticulocytes do not have a cell nucleus. (wikipedia.org)
  • Reticulocytes can be distinguished from other circulating cells because they emit a signal that is neither strong (like lymphocytes) nor weak (like red blood cells). (wikipedia.org)
  • for instance, if someone is anemic but has a reticulocyte percentage of only 1%, the bone marrow is likely not producing new blood cells at a rate that will correct the anemia. (wikipedia.org)
  • citation needed] When there is an increased production of red blood cells to overcome chronic or severe loss of mature red blood cells, such as in a haemolytic anemia, there is often a markedly high number and percentage of reticulocytes. (wikipedia.org)
  • More recent findings suggest that pluripotent stem cells may reside in blood and adult tissues in a dormant state. (wikipedia.org)
  • Based on plant-based experiments by botanist Hugo de Vries, he developed a salt solution that was thought to have the same osmolality as human blood and therefore did not cause haemolysis of red blood cells. (wikipedia.org)
  • In 1918 he described the chloride shift (often called "Hamburger shift"), the process by which red blood cells exchange bicarbonate for chloride. (wikipedia.org)
  • He was the first to quantify the process of phagocytosis by incubating neutrophil granulocytes (white blood cells capable of phagocytosis) with carbon particles, and measuring the uptake. (wikipedia.org)
  • BaP has an effect on the number of white blood cells, inhibiting some of them from differentiating into macrophages, the body's first line of defense to fight infections. (wikipedia.org)
  • This is likely because MeAN exists in part bound to red blood cells, and is therefore unavailable for GSH conjugation. (wikipedia.org)
  • The red blood cells retained significant amounts of radioactivity: more than 50% of the radioactivity in erythrocytes was detected as covalently bound to hemoglobin and membrane proteins. (wikipedia.org)
  • Non-invasive alternatives to liver biopsy include both functional staging (quantitative liver function tests) and determination of fibrosis from non-invasive tests. (wikipedia.org)
  • Quantitative hepatic function tests were better than combinations of routine blood tests and Ishak fibrosis score in predicting clinical outcomes. (wikipedia.org)
  • He is also considered by many to have first popularised the term "clinical chemistry" in his two-volume work Quantitative Clinical Chemistry, co-published with John P. Peters. (wikipedia.org)
  • The two-volume work was widely accepted in the medical world as the "Bible" of quantitative clinical chemistry. (wikipedia.org)
  • Carbon dioxide is retained, making a bicarbonate-buffered blood and interstitium possible. (wikipedia.org)
  • P a C O 2 {\displaystyle P_{\,a\,CO_{2}}} is the partial pressure of carbon dioxide in the arterial blood, and P e C O 2 {\displaystyle P_{\,e\,CO_{2}}} is the partial pressure of carbon dioxide in the expired (exhaled) air. (wikipedia.org)
  • Helv Med Acta 13:328-332, 1946 Riley RL, Lilienthal JL Jr, Proemmel DD, et al: On the determination of the physiologically effective pressures of oxygen and carbon dioxide in alveolar air. (wikipedia.org)
  • This is influenced by the blood level of carbon dioxide, as determined by central and peripheral chemoreceptors located in the central nervous system and carotid and aortic bodies, respectively. (wikipedia.org)
  • A decreased respiratory drive can also be the result of metabolic alkalosis, a state of decreased carbon dioxide in the blood Central sleep apnea. (wikipedia.org)
  • Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the area of pathology that is generally concerned with analysis of bodily fluids. (wikipedia.org)
  • Due to its sensitivity to venous blood SWI is commonly used in traumatic brain injuries (TBI) and for high resolution brain venographies but has many other clinical applications. (wikipedia.org)
  • Their bearing on clinical and experimental medicine (1917) A System of Blood Analysis by Folin and Wu (1919) Laboratory Manual of Biological Chemistry with Supplement (1925) "Otto Folin's Medica Legacy" (PDF). (wikipedia.org)
  • 1982) Clinical chemistry, Vol 28, No 10, 1982 Analytical Biochemistry: the Work of Otto Knuf Olof Folin on Blood Analysis (American Society for Biochemistry and Molecular Biology) "ASBMB Past Presidents. (wikipedia.org)
  • The normal fraction of reticulocytes in the blood depends on the clinical situation but is usually 0.5% to 2.5% in adults and 2% to 6% in infants. (wikipedia.org)
  • Furthermore, RBCs from blood-cell-specific Piezo1 conditional knockout mice are overhydrated and exhibit increased fragility both in vitro and in vivo. (elifesciences.org)
  • This unit describes various protocols for the in vivo quantitation of drug permeability across the rodent blood ‐ brain barrier. (currentprotocols.com)
  • Kinetic stability is more central in the determination of in vivo stability than thermodynamic stability however. (wikipedia.org)
  • 05). No relationship was found between mitotic activity and histologic pattern, suggesting that the correlation between the estimate of volume of the extravascular extracellular space and mitotic activity was independent of the histologic pattern. (ajnr.org)
  • Y10T436/101666 - Particle count or volume standard or control [e.g., platelet count standards, etc. (google.com)
  • More common tests of blood coagulation include prothrombin time (PT,INR) and partial thromboplastin time (aPTT) which measure coagulation factor function, but TEG also can assess platelet function, clot strength, and fibrinolysis which these other tests cannot. (wikipedia.org)
  • It is a subset of the International Statistical Classification of Diseases and Related Health Problems (ICD) 9-CM. Volumes 1 and 2 are used for diagnostic codes. (wikipedia.org)
  • Stochastic model based on preharvest peripheral CD34-positive cell count and collection efficiency predicting processed blood volume in peripheral hematopoietic stem cell apheresis. (bioportfolio.com)
  • BMDW's mission is to create a comprehensive, fair, and equitable global list of unrelated stem cell donors and cord blood products that shall allow fast determination of whether a matched donor is available for a patient in need of a hematopoietic stem cell transplant. (wikipedia.org)
  • The lung volume and its subdivisions: i. (springer.com)
  • Statics' made some important contributions to the understanding of lung volume. (wikipedia.org)
  • For this reason, CO is generally the test gas used to measure the diffusing capacity and the D L {\displaystyle D_{L}} equation simplifies to: The single-breath diffusing capacity test is the most common way to determine D L {\displaystyle D_{L}} . The test is performed by having the subject blow out all of the air that he/she can, leaving only the residual lung volume of gas. (wikipedia.org)
  • Chemical agents and related occupations, Volume 100F, A review of Human Carcinogens, IARC Monographs, Lyon France 2012 In June 2016, BaP was added as benzo[def]chrysene to the REACH Candidate List of Substances of very high concern for Authorisation. (wikipedia.org)
  • Then, to calculate end-systolic and end-diastolic atrial and ventricular volumes, a modified Simpson's rule formula was used. (biomedsearch.com)
  • End-systolic left atrial volume (mean +/- standard deviation) was 37 +/- 11.7 ml or 21 +/- 6.6 ml/m2. (biomedsearch.com)
  • The degree of expansion displayed by artery during diastolic and systolic state is called volume. (wikipedia.org)
  • Blood loss due to phlebotomy leads to hospital-acquired anemia and more frequent blood transfusions that may be associated with increased risk of morbidity and mortality in critically ill patients. (bioportfolio.com)
  • fetoscopy was used and refined between 1974 and 1983 as a prenatal test to determine fetal status as well as obtain fetal blood and perform transfusions in some cases. (wikipedia.org)