Myocardial Perfusion Imaging
Tomography, Emission-Computed, Single-Photon
A method of computed tomography that uses radionuclides which emit a single photon of a given energy. The camera is rotated 180 or 360 degrees around the patient to capture images at multiple positions along the arc. The computer is then used to reconstruct the transaxial, sagittal, and coronal images from the 3-dimensional distribution of radionuclides in the organ. The advantages of SPECT are that it can be used to observe biochemical and physiological processes as well as size and volume of the organ. The disadvantage is that, unlike positron-emission tomography where the positron-electron annihilation results in the emission of 2 photons at 180 degrees from each other, SPECT requires physical collimation to line up the photons, which results in the loss of many available photons and hence degrades the image.
Chemotherapy, Cancer, Regional Perfusion
Technetium Tc 99m Sestamibi
Magnetic Resonance Angiography
Blood Flow Velocity
Magnetic Resonance Imaging
A disorder of cardiac function caused by insufficient blood flow to the muscle tissue of the heart. The decreased blood flow may be due to narrowing of the coronary arteries (CORONARY ARTERY DISEASE), to obstruction by a thrombus (CORONARY THROMBOSIS), or less commonly, to diffuse narrowing of arterioles and other small vessels within the heart. Severe interruption of the blood supply to the myocardial tissue may result in necrosis of cardiac muscle (MYOCARDIAL INFARCTION).
Sensitivity and Specificity
Tomography, X-Ray Computed
Image Processing, Computer-Assisted
Technetium Tc 99m Exametazime
Gated Blood-Pool Imaging
Radionuclide ventriculography where scintigraphic data is acquired during repeated cardiac cycles at specific times in the cycle, using an electrocardiographic synchronizer or gating device. Analysis of right ventricular function is difficult with this technique; that is best evaluated by first-pass ventriculography (VENTRICULOGRAPHY, FIRST-PASS).
The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.
Reproducibility of Results
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
Technetium Tc 99m Aggregated Albumin
Image Interpretation, Computer-Assisted
Any of various animals that constitute the family Suidae and comprise stout-bodied, short-legged omnivorous mammals with thick skin, usually covered with coarse bristles, a rather long mobile snout, and small tail. Included are the genera Babyrousa, Phacochoerus (wart hogs), and Sus, the latter containing the domestic pig (see SUS SCROFA).
Cardiac-Gated Single-Photon Emission Computer-Assisted Tomography
Generally, restoration of blood supply to heart tissue which is ischemic due to decrease in normal blood supply. The decrease may result from any source including atherosclerotic obstruction, narrowing of the artery, or surgical clamping. Reperfusion can be induced to treat ischemia. Methods include chemical dissolution of an occluding thrombus, administration of vasodilator drugs, angioplasty, catheterization, and artery bypass graft surgery. However, it is thought that reperfusion can itself further damage the ischemic tissue, causing MYOCARDIAL REPERFUSION INJURY.
Predictive Value of Tests
In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test.
Coronary Artery Disease
Any visible result of a procedure which is caused by the procedure itself and not by the entity being analyzed. Common examples include histological structures introduced by tissue processing, radiographic images of structures that are not naturally present in living tissue, and products of chemical reactions that occur during analysis.
The first artificially produced element and a radioactive fission product of URANIUM. Technetium has the atomic symbol Tc, atomic number 43, and atomic weight 98.91. All technetium isotopes are radioactive. Technetium 99m (m=metastable) which is the decay product of Molybdenum 99, has a half-life of about 6 hours and is used diagnostically as a radioactive imaging agent. Technetium 99 which is a decay product of technetium 99m, has a half-life of 210,000 years.
An imaging technique using compounds labelled with short-lived positron-emitting radionuclides (such as carbon-11, nitrogen-13, oxygen-15 and fluorine-18) to measure cell metabolism. It has been useful in study of soft tissues such as CANCER; CARDIOVASCULAR SYSTEM; and brain. SINGLE-PHOTON EMISSION-COMPUTED TOMOGRAPHY is closely related to positron emission tomography, but uses isotopes with longer half-lives and resolution is lower.
Ventricular Function, Left
Disease Models, Animal
Rats, Inbred Strains
Radionuclide ventriculography where a bolus of radionuclide is injected and data are recorded from one pass through the heart ventricle. Left and right ventricular function can be analyzed independently during this technique. First-pass ventriculography is preferred over GATED BLOOD-POOL IMAGING for assessing right ventricular function.
Organ Preservation Solutions
Recording of the moment-to-moment electromotive forces of the HEART as projected onto various sites on the body's surface, delineated as a scalar function of time. The recording is monitored by a tracing on slow moving chart paper or by observing it on a cardioscope, which is a CATHODE RAY TUBE DISPLAY.
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.
Magnetic Resonance Imaging, Cine
A type of imaging technique used primarily in the field of cardiology. By coordinating the fast gradient-echo MRI sequence with retrospective ECG-gating, numerous short time frames evenly spaced in the cardiac cycle are produced. These images are laced together in a cinematic display so that wall motion of the ventricles, valve motion, and blood flow patterns in the heart and great vessels can be visualized.
Heart Arrest, Induced
Diffusion Magnetic Resonance Imaging
A diagnostic technique that incorporates the measurement of molecular diffusion (such as water or metabolites) for tissue assessment by MRI. The degree of molecular movement can be measured by changes of apparent diffusion coefficient (ADC) with time, as reflected by tissue microstructure. Diffusion MRI has been used to study BRAIN ISCHEMIA and tumor response to treatment.
Fractional Flow Reserve, Myocardial
The property of blood capillary ENDOTHELIUM that allows for the selective exchange of substances between the blood and surrounding tissues and through membranous barriers such as the BLOOD-AIR BARRIER; BLOOD-AQUEOUS BARRIER; BLOOD-BRAIN BARRIER; BLOOD-NERVE BARRIER; BLOOD-RETINAL BARRIER; and BLOOD-TESTIS BARRIER. Small lipid-soluble molecules such as carbon dioxide and oxygen move freely by diffusion. Water and water-soluble molecules cannot pass through the endothelial walls and are dependent on microscopic pores. These pores show narrow areas (TIGHT JUNCTIONS) which may limit large molecule movement.
One of the CARBONIC ANHYDRASE INHIBITORS that is sometimes effective against absence seizures. It is sometimes useful also as an adjunct in the treatment of tonic-clonic, myoclonic, and atonic seizures, particularly in women whose seizures occur or are exacerbated at specific times in the menstrual cycle. However, its usefulness is transient often because of rapid development of tolerance. Its antiepileptic effect may be due to its inhibitory effect on brain carbonic anhydrase, which leads to an increased transneuronal chloride gradient, increased chloride current, and increased inhibition. (From Smith and Reynard, Textbook of Pharmacology, 1991, p337)
A free radical gas produced endogenously by a variety of mammalian cells, synthesized from ARGININE by NITRIC OXIDE SYNTHASE. Nitric oxide is one of the ENDOTHELIUM-DEPENDENT RELAXING FACTORS released by the vascular endothelium and mediates VASODILATION. It also inhibits platelet aggregation, induces disaggregation of aggregated platelets, and inhibits platelet adhesion to the vascular endothelium. Nitric oxide activates cytosolic GUANYLATE CYCLASE and thus elevates intracellular levels of CYCLIC GMP.
Small encapsulated gas bubbles (diameters of micrometers) that can be used as CONTRAST MEDIA, and in other diagnostic and therapeutic applications. Upon exposure to sufficiently intense ultrasound, microbubbles will cavitate, rupture, disappear, release gas content. Such characteristics of the microbubbles can be used to enhance diagnostic tests, dissolve blood clots, and deliver drugs or genes for therapy.
The failure by the observer to measure or identify a phenomenon accurately, which results in an error. Sources for this may be due to the observer's missing an abnormality, or to faulty technique resulting in incorrect test measurement, or to misinterpretation of the data. Two varieties are inter-observer variation (the amount observers vary from one another when reporting on the same material) and intra-observer variation (the amount one observer varies between observations when reporting more than once on the same material).
The formation of an area of NECROSIS in the CEREBRUM caused by an insufficiency of arterial or venous blood flow. Infarcts of the cerebrum are generally classified by hemisphere (i.e., left vs. right), lobe (e.g., frontal lobe infarction), arterial distribution (e.g., INFARCTION, ANTERIOR CEREBRAL ARTERY), and etiology (e.g., embolic infarction).
Pulmonary Gas Exchange
Ventricular Dysfunction, Left
A condition in which the LEFT VENTRICLE of the heart was functionally impaired. This condition usually leads to HEART FAILURE; MYOCARDIAL INFARCTION; and other cardiovascular complications. Diagnosis is made by measuring the diminished ejection fraction and a depressed level of motility of the left ventricular wall.
Dose-Response Relationship, Drug
The process of generating three-dimensional images by electronic, photographic, or other methods. For example, three-dimensional images can be generated by assembling multiple tomographic images with the aid of a computer, while photographic 3-D images (HOLOGRAPHY) can be made by exposing film to the interference pattern created when two laser light sources shine on an object.
A tissue or organ remaining at physiological temperature during decreased BLOOD perfusion or in the absence of blood supply. During ORGAN TRANSPLANTATION it begins when the organ reaches physiological temperature before the completion of SURGICAL ANASTOMOSIS and ends with reestablishment of the BLOOD CIRCULATION through the tissue.
A group of pathological conditions characterized by sudden, non-convulsive loss of neurological function due to BRAIN ISCHEMIA or INTRACRANIAL HEMORRHAGES. Stroke is classified by the type of tissue NECROSIS, such as the anatomic location, vasculature involved, etiology, age of the affected individual, and hemorrhagic vs. non-hemorrhagic nature. (From Adams et al., Principles of Neurology, 6th ed, pp777-810)
Precursor of epinephrine that is secreted by the adrenal medulla and is a widespread central and autonomic neurotransmitter. Norepinephrine is the principal transmitter of most postganglionic sympathetic fibers and of the diffuse projection system in the brain arising from the locus ceruleus. It is also found in plants and is used pharmacologically as a sympathomimetic.
A diuretic and renal diagnostic aid related to sorbitol. It has little significant energy value as it is largely eliminated from the body before any metabolism can take place. It can be used to treat oliguria associated with kidney failure or other manifestations of inadequate renal function and has been used for determination of glomerular filtration rate. Mannitol is also commonly used as a research tool in cell biological studies, usually to control osmolarity.
Middle Cerebral Artery
Severity of Illness Index
Combination or superimposition of two images for demonstrating differences between them (e.g., radiograph with contrast vs. one without, radionuclide images using different radionuclides, radiograph vs. radionuclide image) and in the preparation of audiovisual materials (e.g., offsetting identical images, coloring of vessels in angiograms).
Tools or devices for generating products using the synthetic or chemical conversion capacity of a biological system. They can be classical fermentors, cell culture perfusion systems, or enzyme bioreactors. For production of proteins or enzymes, recombinant microorganisms such as bacteria, mammalian cells, or insect or plant cells are usually chosen.
Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.
Arterial Occlusive Diseases
Devices or objects in various imaging techniques used to visualize or enhance visualization by simulating conditions encountered in the procedure. Phantoms are used very often in procedures employing or measuring x-irradiation or radioactive material to evaluate performance. Phantoms often have properties similar to human tissue. Water demonstrates absorbing properties similar to normal tissue, hence water-filled phantoms are used to map radiation levels. Phantoms are used also as teaching aids to simulate real conditions with x-ray or ultrasonic machines. (From Iturralde, Dictionary and Handbook of Nuclear Medicine and Clinical Imaging, 1990)
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.
Circulatory Arrest, Deep Hypothermia Induced
A basic element found in nearly all organized tissues. It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth. It is essential for the normal functioning of nerves and muscles and plays a role in blood coagulation (as factor IV) and in many enzymatic processes.
Analysis of Variance
Tomography, Spiral Computed
Computed tomography where there is continuous X-ray exposure to the patient while being transported in a spiral or helical pattern through the beam of irradiation. This provides improved three-dimensional contrast and spatial resolution compared to conventional computed tomography, where data is obtained and computed from individual sequential exposures.
A non-inherited congenital condition with vascular and neurological abnormalities. It is characterized by facial vascular nevi (PORT-WINE STAIN), and capillary angiomatosis of intracranial membranes (MENINGES; CHOROID). Neurological features include EPILEPSY; cognitive deficits; GLAUCOMA; and visual defects.
Infarction, Middle Cerebral Artery
NECROSIS occurring in the MIDDLE CEREBRAL ARTERY distribution system which brings blood to the entire lateral aspects of each CEREBRAL HEMISPHERE. Clinical signs include impaired cognition; APHASIA; AGRAPHIA; weak and numbness in the face and arms, contralaterally or bilaterally depending on the infarction.
The effect of cardiac contraction on collateral resistance in the canine heart. (1/6670)We determined whether the coronary collateral vessels develop an increased resistance to blood flow during systole as does the cognate vascular bed. Collateral resistance was estimated by measuring retrograde flow rate from a distal branch of the left anterior descending coronary artery while the main left coronary artery was perfused at a constant pressure. Retrograde flow rate was measured before and during vagal arrest. We found that in 10 dogs the prolonged diastole experienced when the heart was stopped caused no significant change in the retrograde flow rate, which indicated that systole has little effect on the collateral resistance. However, when left ventricular end-diastolic pressure was altered by changing afterload or contractility, a direct relationship between end-diastolic pressure and collateral resistance was noted. (+info)
Effect of tumor necrosis factor alpha on vascular resistance, nitric oxide production, and glucose and oxygen consumption in perfused tissue-isolated human melanoma xenografts. (2/6670)The effect of tumor necrosis factor alpha (TNF-alpha) on vascular resistance, nitric oxide production, and consumption of oxygen and glucose was examined in a perfused tissue-isolated tumor model in nude mice. One experimental group was perfused with heparinized Krebs-Henseleit buffer, a second one was perfused with TNF-alpha (500 microgram/kg) 5 h before perfusion. The vascular resistance increased significantly 5 h after TNF-alpha injection. The increase in vascular resistance did not seem to be mediated by a decrease in tumor nitric oxide production, as determined by perfusate nitrate/nitrite concentrations, but may be due to aggregation of leukocytes, platelets, and erythrocytes and/or endothelial consumption among the three experimental groups. The oxygen consumption was linearly dependent on the amount of available oxygen in the perfusate, whereas the glucose consumption was constant and independent of the glucose delivery rate. The present experiments provide new insights into physiological and metabolic mechanisms of action of TNF- alpha for optimization of future treatment schedules involving TNF-alpha. (+info)
Drug-protein binding and blood-brain barrier permeability. (3/6670)The permeability surface area (PS) product, an index of permeability of the blood-brain barrier (BBB), was measured by using the in situ perfusion method. In the cerebral circulation, the fraction of drug that permeates into the brain through the BBB is not only the unbound fraction but also the fraction dissociated from the protein in the perfusate. The sum of these two fractions, the apparent exchangeable fraction, was estimated by fitting the parameters of the BBB permeability under the condition of varying BSA concentrations in the perfusate. The unbound fraction of drugs in a buffer containing 0.5 mM BSA was measured by using the ultrafiltration method in vitro, and the apparent exchangeable fraction was measured in vivo by using the intracarotid artery injection method. The apparent exchange fraction was 100% for S-8510, 96.5% for diazepam, 90.9% for caffeine, 38.3% for S-312-d, 33.1% for propranolol, and 6.68% for (+)-S-145 Na, and each of these was higher than the corresponding unbound fraction in vitro in all drugs. The apparent exchangeable fractions, for example, were 8 times higher for diazepam and 38 times for S-312-d than the unbound fractions in vitro. The apparent exchangeable fraction of drugs was also estimated from the parameters obtained with the perfusion method. Because drugs can be infused for an arbitrary length of time in the perfusion method, substances with low permeability can be measured. The apparent exchangeable fractions obtained with this method were almost the same as those obtained with the intracarotid artery injection method. (+info)
Effects of inhibitors and substitutes for chloride in lumen on p-aminohippurate transport by isolated perfused rabbit renal proximal tubules. (4/6670)The transport step for p-aminohippurate (PAH) from cell to lumen across the luminal membrane of rabbit proximal tubules has not been adequately defined. To examine this process more closely, we determined the effects of possible transport inhibitors and substitutes for chloride on PAH secretion in isolated perfused S2 segments of rabbit proximal tubules. The addition of 4-acetamido-4'-isothiocyano-2,2' disulfonic stilbene (10(-4) M) to the perfusate irreversibly inhibited PAH secretion, whereas the addition of probenecid (10(-4) M) to the perfusate reversibly inhibited PAH secretion. PAH secretion was unaffected by thiocyanate replacement of chloride in the luminal perfusate, reversibly inhibited by 15 to 20% by methyl sulfate replacement, and irreversibly inhibited by isethionate replacement. Because the luminal membrane is at least as permeable to thiocyanate as to chloride, less permeable to methyl sulfate, and much less permeable to isethionate, these data suggest that the PAH transport step from cells to lumen does not require chloride in the lumen but does require a highly permeant anion. During inhibition of PAH transport from cells to lumen, PAH uptake across the basolateral membrane was also reduced, suggesting some type of feedback inhibition. The data are compatible with PAH transport across the luminal membrane by an anion exchanger, a potential-driven uniporter, both carriers, or a carrier that can function in both modes. (+info)
The mechanism of the increasing action of TA-993, a new 1,5- benzothiazepine derivative, on limb blood flow in anesthetized dogs: selective suppression of sympathetic nerve activity. (5/6670)TA-993, (-)-cis-3-acetoxy-5-(2-(dimethylamino)ethyl)-2, 3-di-hydro-8-methyl-2-(4-methylphenyl)-1,5-benzothiazepin-4(5H)one maleate, a new 1,5-benzothiazepine derivative with l-cis configuration, has a unique and selective increasing action on limb blood flow with little influence on arterial pressure besides an antiplatelet action. We studied the mechanism of increasing action of TA-993 on limb blood flow in anesthetized dogs. In a canine blood-perfused hindlimb preparation with a donor dog, TA-993 (100 microg/kg i.v.) did not increase femoral blood flow when administered to the donor dog, but did when administered to a recipient dog. TA-993 did not show the increasing action on femoral blood flow in the presence of hexamethonium or phentolamine, whereas it did in the presence of propranolol or atropine. TA-993 also showed a weak increasing effect on heart rate, which was inhibited by any one of these blockers. TA-993 (300 microg/kg i.v.) did not alter the phenylephrine (1-100 ng/kg i.a.)- or the talipexole (3-100 ng/kg i.a.)-induced increase in perfusion pressure in an autoperfused hindlimb. These results suggest that the increasing action of TA-993 on limb blood flow is mediated by the sympathetic nervous system but that the adrenergic receptors are not likely to be the central point of action of this new agent. There is a possibility that the mechanism of the increasing action on heart rate is different from that of its increasing action on limb blood flow. (+info)
Activation of the kallikrein-kinin system in hemodialysis: role of membrane electronegativity, blood dilution, and pH. (6/6670)BACKGROUND: The kallikrein-kinin system activation by contact with a negatively charged surface has been promulgated to be responsible for hypersensitivity reactions. However, to explain the low frequency and heterogeneity of hypersensitivity reactions, we hypothesized that not only the electronegativity of the membrane, but also other physicochemical parameters could influence the activation of the contact phase system of plasma assessed by the measurement of kallikrein activity and bradykinin concentration. METHODS: Plasma kallikrein activity using chromogenic substrate (S2302) and plasma bradykinin concentration (enzyme immuno assay) were measured during the perfusion of human plasma (2.5 ml/min) through minidialyzers mounted with six different membranes [polyacrylonitrile (PAN) from Asahi (PANDX) and from Hospal (AN69), polymethylmethacrylate (PMMA) from Toray, cellulose triacetate (CT) from Baxter, cuprophane (CUP) from Akzo and polysulfone (PS) from Fresenius]. RESULTS: A direct relationship was shown between the electronegativity of the membrane assessed by its zeta potential and the activation of plasma during the first five minutes of plasma circulation. With the AN69 membrane, the detection of a kallikrein activity in diluted plasma but not in undiluted samples confirmed the importance of a protease-antiprotease imbalance leading to bradykinin release during the first five minutes of dialysis. With PAN membranes, the use of citrated versus heparinized plasma and the use of various rinsing solutions clearly show a dramatic effect of pH on the kallikrein activity and the bradykinin concentration measured in plasma. Finally, increasing the zeta potential of the membrane leads to a significant increase of plasma kallikrein activity and bradykinin concentration. CONCLUSIONS: Our in vitro experimental approach evidences the importance of the control of these physicochemical factors to decrease the activation of the contact system. (+info)
Three-independent-compartment chamber to study in vitro commissural synapses. (7/6670)We describe a novel chamber in which the two intact neonatal rat hippocampi and the commissural fibers are placed in three independent compartments separated by latex membranes and perfused selectively with different solutions. A set of control tests showed that the compartments are well isolated: 1) methylene blue or eosin applied to one compartment did not diffuse to other compartments when verified via the microscope, and spectrophotometry revealed that <1/10.000th of the dye diffuses to other compartments; 2) tetrodotoxin (1 microM) applied to the commissural compartment blocked the synaptic responses evoked contralaterally without affecting those evoked on the ipsilateral side. This chamber enables a wide range of experiments that cannot be performed in conventional chambers, e.g., to study the maturation and plasticity of the commissural connections, bilateral synchronization of the rhythmic activities in the limbic system, commissural propagation of the epileptiform activities, etc. (+info)
Influence of renal failure on intestinal clearance of ciprofloxacin in rats. (8/6670)Following intravenous doses, ciprofloxacin pharmacokinetics in control and nephrectomized rats were studied. There were no differences between control and nephrectomized rats for area under the concentration-time curve in plasma or biliary clearance. The intestinal clearance of ciprofloxacin was increased in nephrectomized rats. Intestinal elimination seems to compensate partially for the decrease in urinary excretion of ciprofloxacin in nephrectomized rats. (+info)
Retrograde perfusion - Wikipedia
Retrograde perfusion (retroperfusion) is an artificial method of providing blood supply to an organ by delivering oxygenated blood through the veins. It may be performed during surgery that interrupts the normal arterial supply of blood to that organ. For instance, when performing surgery that interrupts the cerebral arteries, a hose placed into the femoral artery and the superior vena cava can redirect blood up the internal jugular vein to supply the brain. This technique was pioneered by Oscar Langendorff, who perfused mamallian hearts ex vivo for research applications. Thus, it is often called Langendorff perfusion. Langendorff heart Perfusion Levy WJ, Levin SK, Bavaria JE (July 1995). Cerebral oxygenation during retrograde perfusion. Ann. Thorac. Surg. 60 (1): 184-6. doi:10.1016/s0003-4975(94)01000-5. PMID 7598586. Bell, R., Mocanu, M. & Yellon, D. Retrograde heart perfusion: The Langendorff technique of isolated heart perfusion. Journal of Molecular and Cellular Cardiology 50, 940-950 ...
Resuscitation of marginal hearts using ex vivo perfusion - Northumbria Research Link
Introduction: Increasing the usage of hearts from marginal donors and from donors after circulatory death (DCD) has the potential to expand the donor pool. Such hearts may be resuscitated when subjected to ex vivo perfusion. In addition, this may provide an opportunity for viability testing prior to transplant. We describe a novel ex vivo perfusion system designed to reanimate porcine DCD hearts. The same system was subsequently tested using a human heart from a marginal brainstem-dead donor.. Method: In the first phase of the study 23 porcine hearts were procured following circulatory death. All hearts were subjected to a period of primary warm ischemia followed by 120 minutes of hypothermic preservation. The period of hypothermic preservation was initially static cold storage (SCS); then oxygenated machine perfusion and finally a combination of static cold storage and oxygen persufflation via the coronary sinus. Ex vivo perfusion of the hearts was performed with a normothermic, oxygenated ...
Editorial Comment on: Intraoperative Retrograde Perfusion Sphincterometry to Evaluate Efficacy of Autologous Vas Deferens 6...
TY - JOUR. T1 - Editorial Comment on. T2 - Intraoperative Retrograde Perfusion Sphincterometry to Evaluate Efficacy of Autologous Vas Deferens 6-Branch Suburethral Sling to Properly Restore Sphincteric Apparatus during Robot-Assisted Radical Prostatectomy by Cestari et al.. AU - Sundaram, Chandru. PY - 2017/9/1. Y1 - 2017/9/1. UR - http://www.scopus.com/inward/record.url?scp=85038619116&partnerID=8YFLogxK. UR - http://www.scopus.com/inward/citedby.url?scp=85038619116&partnerID=8YFLogxK. U2 - 10.1089/end.2017.0552. DO - 10.1089/end.2017.0552. M3 - Comment/debate. C2 - 28791870. AN - SCOPUS:85038619116. VL - 31. JO - Journal of Endourology. JF - Journal of Endourology. SN - 0892-7790. IS - 9. ER - ...
Perfusion Solution Inc. >...
Perfusion Solution Inc. is committed to protecting your privacy and developing technology that gives you the most powerful and safe online experience. This Statement of Privacy applies to the Perfusion Solution Inc. site and governs data collection and usage. By using the Perfusion Solution Inc. site, you consent to the data practices described in this statement.. Collection of your Personal Information. Perfusion Solution Inc. collects personally identifiable information, such as your email address, name, home or work address or telephone number. Perfusion Solution Inc. also collects anonymous demographic information, which is not unique to you, such as your ZIP code, age, gender, preferences, interests and favorites.. There is also information about your computer hardware and software that is automatically collected by Perfusion Solution Inc.. This information can include: your IP address, browser type, domain names, access times and referring website addresses. This information is used by ...
Combination of enzymes and flow perfusion conditions improves osteogenic differentiation of bone marrow stromal cells cultured...
Combination of enzymes and flow perfusion conditions improves osteogenic differentiation of bone marrow stromal cells cultured upon starch/poly(å-caprolactone) fiber ...
spo2 low perfusion - spo2 low perfusion for sale of page 2.
Best spo2 low perfusion and spo2 low perfusion manufacturers - 1720 spo2 low perfusion Manufacturers & Suppliers of page 2 from China
Ex vivo perfusion of plasma over protein A columns in human mammary adenocarcinoma. Role of the Fc-binding capacity of protein...
Kinet JP, Bensinger WI, Balland N, Saint-Remy M, Frankenne F, Hennen G, Mahieu P. Ex vivo perfusion of plasma over protein A columns in human mammary adenocarcinoma. Role of the Fc-binding capacity of protein A in the side effects and the tumoricidal response. Eur J Clin Invest. 1986 Feb; 16(1):50-5 ...
Novel Lung Trial: Normothermic Ex Vivo Lung Perfusion (Evlp) As An Assessment Of Extended/Marginal Donor Lungs - Full Text View...
These lungs will be brought to the study transplant center to be re-assessed by the transplant team. The lungs will be physiologically assessed during ex vivo perfusion with Steen Solution. Perfusion of these lungs will be performed using Steen solution with the addition of methylprednisolone, heparin and antibiotics. With respect to the decision of lung utilization those organs with a delta pO2 (Δ pO2 = Pulmonary vein pO2 - pulmonary artery pO2) during ex vivo perfusion assessment , 350mmHg, good lung compliance, and a favorable opinion of the transplant surgeon will be considered transplantable. Lungs will be excluded for transplantation: if the Δ pO2 is less than 350mmHg or if they demonstrate ,10% deterioration in any of the following functional parameters: pulmonary vascular resistance (PVR), dynamic compliance or airway pressures. Lungs will also be excluded if they are deemed unsuitable based on the clinical judgment of the lung transplant surgeon ...
Munin: Effects of Constant Flow vs. Constant Pressure Perfusion on Fluid Filtration in Severe Hypothermic Isolated Blood...
Victims of severe accidental hypothermia are prone to fluid extravasation but rarely develop lung edema. We hypothesize that combined hypothermia-induced increase in pulmonary vascular resistance (PVR) and a concomitant fall in cardiac output protect the lungs against edema development. Our aim was to explore in hypothermic- isolated blood-perfused rat lungs whether perfusion at constant pressure influences fluid filtration differently from perfusion at constant flow ...
Differential control of glycogenolysis and flow by arterial and portal acetylcholine in perfused rat liver | Biochemical Journal
The effects of acetylcholine on glucose and lactate balance and on perfusion flow were studied in isolated rat livers perfused simultaneously via the hepatic artery (100 mmHg, 25-35% of flow) and the portal vein (10 mmHg, 75-65% of flow) with a Krebs-Henseleit bicarbonate buffer containing 5 mM-glucose, 2 mM-lactate and 0.2 mM-pyruvate. Arterial acetylcholine (10 microM sinusoidal concentration) caused an increase in glucose and lactate output and a slight decrease in arterial and portal flow. These effects were accompanied by an output of noradrenaline and adrenaline into the hepatic vein. Portal acetylcholine elicited only minor increases in glucose and lactate output, a slight decrease in portal flow and a small increase in arterial flow, and no noradrenaline and adrenaline release. The metabolic and haemodynamic effects of arterial acetylcholine and the output of noradrenaline and adrenaline were strongly inhibited by the muscarinic antagonist atropine (10 microM). The ...
Quantitative imaging: systematic review of perfusion/flow phantoms | European Radiology Experimental | Full Text
We aimed at reviewing design and realisation of perfusion/flow phantoms for validating quantitative perfusion imaging (PI) applications to encourage best practices. A systematic search was performed on the Scopus database for
WATERS IGL® PULSATILE PERFUSION SOLUTION - Waters Medical Systems
WATERS IGL® Pulsatile Perfusion Solution has a calculated potassium concentration of 25 mEq/L, a sodium concentration of 100 mEq/L, an osmolarity of 300 mOsM, and a pH of 7.4 at room temperature. Its ion composition is comparable with that of the intracellular milieu. ...
Ex vivo perfusion in a lung box for rehabilitation of donor lungs - University of Arizona
A steady state perfusion experiment<...
TY - GEN. T1 - A steady state perfusion experiment. AU - Karlsen, OT. AU - Creyghton, JHN. AU - Mehlkopf, AF. AU - Bovee, WMJJ. N1 - ISSN 1065-9889. PY - 1996. Y1 - 1996. M3 - Conference contribution. SP - 1308. EP - 1308. BT - Proceedings of the fourth scientific meeting and exhibition of the ISMRM-4. ER - ...
Automatic assessment of cardiac perfusion MRI<...
TY - GEN. T1 - Automatic assessment of cardiac perfusion MRI. AU - Ólafsdóttir, Hildur. AU - Stegmann, Mikkel Bille. AU - Larsson, Henrik B.W.. PY - 2004. Y1 - 2004. N2 - In this paper, a method based on Active Appearance Models (AAM) is applied for automatic registration of myocardial perfusion MRI. A semi-quantitative perfusion assessment of the registered image sequences is presented. This includes the formation of perfusion maps for three parameters; maximum up-slope, peak and time-to-peak.. AB - In this paper, a method based on Active Appearance Models (AAM) is applied for automatic registration of myocardial perfusion MRI. A semi-quantitative perfusion assessment of the registered image sequences is presented. This includes the formation of perfusion maps for three parameters; maximum up-slope, peak and time-to-peak.. M3 - Article in proceedings. BT - Medical image computing and computer assisted intervention, MICCAI. PB - Springer. T2 - Medical image computing and computer assisted ...
Internet Scientific Publications
Intestinal segments (5 ± 1 cm) were everted according to the method described by Wilson & Wiseman. After being everted, segments of guts were blotted with a piece of whatman filter paper no. 40 and weighted. A 1 g glass weight was fixed and tied to the end of the everted gut segment to make an empty gut sac. This was important to prevent peristaltic muscular contractions, which may otherwise alter the shape and internal volume of the sac. The 1 g glass weight was the minimum weight to secure the above-mentioned conditions. After weighing, the empty sac was filled with 0.5 mL of Krebs-Henseleit bicarbonate buffer (KHB). The composition of the buffer was: NaHCO3 25 mM/L; NaCl 118 mM/L; KCl 4.7 mM/L; MgSO4 1.2 mM/L; NaH2PO4 1.2 mM/L; CaCl2 1.2 mM/L; and Na4EDTA 9.7 mg/L. Glucose (2g/L) was added to the medium just before the start of the appropriate experiment. The pH was maintained at 7.4. The sac was filled with a blunted-ended syringe and then the needle was slipped off carefully, and the ...
Patent US6447539 - Method and apparatus for treating ischemic heart disease by providing ... - Google Patents
Methods and apparatus are provided for use in intraoperative and percutaneous procedures for supplying long-term retrograde perfusion of the myocardium via one or more conduits disposed between the left ventricle and the coronary venous vasculature. The conduits are of a selected size and number, and portions of the venous vasculature or coronary ostium are partially or completely occluded, to maintain a parameter related to the pressure attained in the venous vasculature to a value less than a predetermined value.
Extracorporeal perfusion - reduced to a one-way infusion - IOS Press
BACKGROUND: Extracorporeal perfusion (EP) is moving into focus of research in reconstructive and transplantation medicine for the preservation of amputates and free tissue transplants. The idea behind EP is the reduction of ischemia-related cell dama
AmSECT : Blogs : Associate Director - Cardiovascular Perfusion
Position: Associate Director - Cardiovascular Perfusion. Location: Cincinnati, OH. Description: The Department of Cardiovascular Perfusion is seeking an Associate Director - Cardiovascular Perfusion to assist the Director of Cardiovascular Perfusion supervising the application and development of circulation technology techniques in the operating room and throughout the institution. Partners with the Director of Cardiovascular Perfusion and medical team to develop innovative strategies for identified cardiovascular perfusion clinical initiatives. Participates in the development of clinical and research model that elevate the Heart Institute to become nationally and internationally redound cardiovascular perfusion programs. Assists the Director of Cardiovascular Perfusion in the day to day operations of the department. Requirements:. *Bachelors degree required in an allied health field or equivalent with a strong science background, and advanced training in circulation technology from a CAHEP ...
Automated 3D Perfusion System 【Under Development】 - Takasago
Suitable for 3D tissue cultivation Conventional perfusion methods use basically the same structure as static cultivation and just replace a medium slowly and continuously, where the flow of the medium only passes over the layer of cells. Our new system utilises cell culture inserts and enables 3-dimensional perfusion t
Supportive development of functional tissues for biomedical research using the MINUSHEET(R) perfusion system -...
Functional tissues generated under in vitro conditions are urgently needed in biomedical research. However, the engineering of tissues is rather difficult, since their development is influenced by numerous parameters. In consequence, a versatile culture system was developed to respond the unmet needs.Optimal adhesion for cells in this system is reached by the selection of individual biomaterials. To protect cells during handling and culture, the biomaterial is mounted onto a MINUSHEET(R) tissue carrier. While adherence of cells takes place in the static environment of a 24 well culture plate, generation of tissues is accomplished in one of several available perfusion culture containers. In the basic version a continuous flow of always fresh culture medium is provided to the developing tissue. In a gradient perfusion culture container epithelia are exposed to different fluids at the luminal and basal sides. Another special container with a transparent lid and base enables microscopic ...
PolyAn: CoverWell™ Perfusion Chambers
CoverWell™ Perfusion Chambers are press-to-seal incubation chambers designed to that attach onto wet or dry surfaces without the use of adhesive and ideal for live cell imaging, cell incubations and cytochemistry. Similar to CoverWell Incubation Chambers, these water-tight perfusion chambers are made of medical grade silicone bonded to clear, UV-transparent plastic except with ports for fluid exchange within the chamber. Various configurations were designed to provide single- or multi-well chambers when pressed to coverslips or microscope slides. Reagents can be quickly added and removed through dual access ports without disturbing or cross-contaminating specimens in adjacent wells. Chambers are well suited for live cell imaging on upright or inverted microscopes and are removable for permanent mounting of specimens. They can be washed and reused. Please note, that we can customize chamber shape, size and depth for your application.. ...
Low Temperature Recirculated Liquid - Opti-Code Ammonia Pipe Markers
Label pipes with IIAR-approved pipe markers such as Low Temp Recirculated Liquid - Opti-Code Ammonia Pipe Markers and help prevent accidents. Buy from Emedco!
Patent US5679775 - Process and device for the simultaneous extracorporeal elimination of tumour ... - Google Patents
In order to remove tumor necrosis factor α (TNFα) or/and bacterial lipopolysaccharides (LPS, endotoxin) extracorporeally from whole blood or/and blood plasma in an extracorporeal perfusion system, the blood or plasma is passed over a cation exchanger and an anion exchanger material. A device according to the invention for the extracorporeal treatment of patients blood or plasma therefore contains a cation exchanger material and an anion exchanger material wherein these materials are contained in at least one compartment of an extracorporeal perfusion system.
Characteristics of an Effective Perfusion Education Program
Adopted January, 1993. Preamble: Since 1979, the Academy has served as an educational organization to encourage and stimulate investigation and study. The Academy has continued to support perfusion education with the first perfusion education scholarship program in 1983. In support of perfusion education and the process for recognizing effective perfusion education programs, The Academy recognizes the following ideal characteristics for an effective Perfusion Education Program.. THE EFFECTIVE PERFUSION EDUCATION PROGRAM:. ...
Perfusion System Market Size & Share, 2025 | Industry Analysis Report
The global Perfusion System Market size is expected to value at USD 183.8 million by 2025. The market is subject to witness a substantial growth due to the rising occurrence of organ failures, and spurring demand for transplantation procedures
Transportable Perfusion System Market Insights (2020 to 2025) - Analysis and Forecast for the Global and Chinese Markets ✔️...
Transportable Perfusion System Market Insights (2020 to 2025) - Analysis and Forecast for the Global and Chinese Markets ✅ Investors Diurnal Finance Magazine Your business news source, updated 24/7 ✅ Click here for more news.
Perfusion Systems Market to 2027- Global Analysis and Forecasts by Type ; Component and Geography
The global perfusion systems market is expected to reach US$ 1,442.28 Mn in 2027 from US$ 1,044.75 Mn in 2018. The market is estimated to grow with a CAGR of 3.8% ...
Medical Perfusion System Market Archives - TheGamingRadar
The Medical Perfusion System Market globally is a standout amongst the most emergent and astoundingly approved sectors. This worldwide market has been developing at a ...
Lung and liver perfusion on the rise - UNOS
Lung perfusion has more than tripled since 2015, growing from 1.7 percent to 6.3 percent and potentially expanding the pool of organs available for transplant.
Transplantology | Free Full-Text | Mitochondrial Reprogramming-What Is the Benefit of Hypothermic Oxygenated Perfusion in...
Although machine perfusion is a hot topic today, we are just at the beginning of understanding the underlying mechanisms of protection. Recently, the first randomized controlled trial reported a significant reduction of ischemic cholangiopathies after transplantation of livers donated after circulatory death, provided the grafts were treated with an endischemic hypothermic oxygenated perfusion (HOPE). This approach has been known for more than fifty years, and was initially mainly used to preserve kidneys before implantation. Today there is an increasing interest in this and other dynamic preservation technologies and various centers have tested different approaches in clinical trials and cohort studies. Based on this, there is a need for uniform perfusion settings (perfusion route and duration), and the development of general guidelines regarding the duration of cold storage in context of the overall donor risk is also required to better compare various trial results. This article will highlight how
A perfusion chamber for high-resolution light microscopy of cultured cells. :: MPG.PuRe
Author: Finch, S.A.E. et al.; Genre: Journal Article; Published in Print: 1988-07; Title: A perfusion chamber for high-resolution light microscopy of cultured cells.
Perfusion University | Perfusion LT
Our courses and practice exams are categorized and focused on the 11 major sections (Anatomy & Physiology, Pharmacology, Pathology, Laboratory Analysis, Quality Assurance, Devices & Equipment, Clinical Management, Special Patient Groups, Special Procedures/Special Techniques, Catastrophic Events & Device Failure, Monitoring) of perfusion knowledge base as emphasized by the American Board of Cardiovascular Perfusion, and the cardiovascular perfusion consensus curriculum created and adopted by the Accreditation Committee-Perfusion Education.. ...
Magnetic Particle Imaging of the vasculature to assess blood delivery and tissue level perfusion. The direct quantitation of nanoparticle tracers enables accurate perfusion measurements without confounding background tissue signal. Long circulating tracers persist within the vasculature for days, enabling repeated measurements for longitudinal studies. This enables truly functional imaging to measure changes in blood flow and tracer delivery over time in stroke and tumor models. ...
KardioVasc heart vascular perfusion | Deagle Network
Dr Bill Deagle MD AAEM ACAM A4M, Farid, KardioVasc Heart Vascular Perfusion, Top Natural Health Formula, Seven Synergistic Herbal Activated Biomolecules, Prevent Heart Attack Stoke Thrombosis, Second Half, Nutriodine, Tesla Activated Monatomic Plasma Iodine, Kills All Pathogen, Regenerates Mitochondria, Detoxifies All Halides Chlorides Bromides Fluorides, Reverses Hypothyroidism and Hypometabolism, www.NutriMedical.com, www.Deagle-Network.com, www.ClayandIRON.com, The NutriMedical Report… ...
Autoregulation of blood flow denotes the intrinsic ability of an organ or a vascular bed to maintain a constant perfusion in the face of blood pressure changes. Alternatively, autoregulation can be defined in terms of vascular resistance changes or simply arteriolar caliber changes as blood pressure …
Words That Rhyme With Perfusion | All Perfusion Rhyming Words List
➜ Rhyming Words List for Perfusion - Find all words that rhyme with perfusion at RhymeDB.com. Near Rhymes, Meanings, Similar Endings, Similar Syllables.
Perfusion of neonatal mouse?: post #1
Perfusion of neonatal mouse? - posted in Neuroscience: Hi, has anyone done an intracardiac perfusion on an infant mouse? I keep reading papers that just say to do it, but I am not sure how- what gauge needle would I use, what flow rate, how to get the skull off without mangling the brain (the answer to that one may be be very careful...) Thanks, if you have done this, I would appreciate tips -DB
dosing pump images
4 water & industry > solenoid dosing pumps tekna evo proportional dosage SEL Alarm SEL 1:1 C 9 8 7 5 6 4 3 2 1 90 80 30 70 40 50 60 20 10 min 100% 10 4:1 10:1 1:n 4-20 Analogue Version teknaEVOAPG Analogue dosing pump with constant flow rate manually adjustable, proportional flow rate according to an external analogue (420 mA) or digital pulse signal (e.g. from water meter).. Get Price ...
bostongop: Clinical assessment of peripheral perfusion to predict
Hello, are you looking for article Clinical assessment of peripheral perfusion to predict ? If it is true we are very fortunate in being able to provide information Clinical assessment of peripheral perfusion to predict And good article Clinical assessment of peripheral perfusion to predict This could benefit/solution for you. ...
BCIT : : PERF 8400 - Cardiovascular Perfusion Clinical 4
Cardiovascular Perfusion Clinical 4 is a continuation of PERF 8300. The students are expected to improve upon the level of competency gained in previous clinical courses. In this clinical course, students will continue to review and apply the objectives introduced in previous rotations, as well as prepare and apply advanced Perfusion techniques and technologies. Review of CPB case studies will assist the students in understanding various clinical scenarios and conditions that have presented in the past and how they were managed.
Perfusion Set DUAL (open perfusion) for 35 mm Petri Dishes | PeCon GmbH
The perfusion set enables perfusion applications with 2 inlets and 2 outlets and is compatible to a large variety of 35 Petri dishes.
Cardiac Perfusion and Pumping Engineering (Repost) / AvaxHome
Eddie Yin Ng, Dhanjoo N Ghista, "Cardiac Perfusion and Pumping Engineering" 2007 | pages: 612 | ISBN: 9812706968 | PDF | 12,7 mb
Organ Assist - Leading in perfusion
Organ Assist is a company that develops and produces Organ Perfusion Systems. Our integrated solutions for liver, kidney and lung allow for more and better quality donor organs to become available.
Small Preparation Dishes for Mouse Heart - Perfusion Systems Additional & Replacement Components - Isolated Organ
CVP causes noise through the MEA-PGP perfusion chamber
Hello, Im using a perforated MEA with a 2-way peristaltic pump meaning, that I have a perfusion from the top and one from the bottom. I also use two different
We develop and produce our instruments in Germany. These include a wide range of amplifiers, isolated stimulators, devices for precise substance application, temperature controllers (see our Product Overview).. ...
Perfusion system | Cherry Biotech
Testing different conditions while performing live-analyses is a challenge, though key to compare cellullar answer to different stimuli. ...
Cytiva Introduces the Xcellerex Automated Perfusion System
The APS system comes equipped with filter switching, liquid management, and cell bleed to reduce risk of human error and increase process robustness.
For bad and/or marginal blocks on hard disks, can anything be more effective than a single pass of zeros? - Ask Different
Im not sure Im following your question.. When a drive detects an unwritable, or bad sector, its supposed to mark the unwritable block as bad, then re-map the bad sector to a spare sector. It makes no difference what type of data is contained in the data to be written to the drive. This will happen until the amount of spare sectors are used up. After they are, then with most drives, the bad sector is simply left in place and the drive should be considered bad.. From the post from your Apple link, I would tend to agree more with Martin Joseph than some of the others. If the number of bad sectors is increasing with any degree of regularity, then it likely means bearings are failing in either the actuator or the drive motor. This allows too much play in the mechanisms and results in more and more head crashes as the problem gets worse, which causes more and more bad sectors. Either the drive will fail from mechanical problem (bad bearings,) the heads will eventually become damaged, or the ...
Perfusion - Wikipedia
"Perfusion , What is Perfusion?". Cardiovascular Perfusion Forum.. *^ "Perfusion , Perfusion Services". Specialty Care Services ... See also: Perfusion scanning. In equations, the symbol Q is sometimes used to represent perfusion when referring to cardiac ... Malperfusion, also called poor perfusion, is any type of incorrect perfusion. There is no official or formal dividing line ... A Lindbergh perfusion pump, c. 1935, an early device for simulating natural perfusion ...
Ventilation/perfusion ratio - Wikipedia
Perfusion. The impact of gravity on pulmonary perfusion expresses itself as the hydrostatic pressure of the blood passing ... On the other side Ventilation-perfusion mismatch is the term used when the ventilation and the perfusion of a gas exchanging ... While both ventilation and perfusion increase going from the apex to the base, perfusion increases to a greater degree than ... In respiratory physiology, the ventilation/perfusion ratio (V̇/Q̇ ratio or V/Q ratio) is a ratio used to assess the efficiency ...
... objective of this study is to examine the feasibility of PA imaging as a tool for quantitative measurements on tissue perfusion ... Measuring tissue perfusion is valuable for diagnosis and treatment monitoring in numerous diseases. Photo-acoustic (PA) imaging ... In vivo perfusion measurements in the extremities (arms, legs) during exercise.. *Coupled muscle perfusion and deformation ... Photoacoustic imaging: looking at skin perfusion This technique is based on the absorption of short laser pulses in tissue, ...
Perfusion-Weighted Imaging | SpringerLink
PWI Magnetic resonance perfusion-weighted imaging is a more sensitive method than conventional CT and MR imaging. While the ... Perfusion imaging is positive immediately following an acute stroke.. The difference between diffusion and perfusion ... Comparison of admission perfusion computed tomography and qualitative diffusion- and perfusion weighted magnetic resonance ... Magnetic resonance perfusion-weighted imaging is a more sensitive method than conventional CT and MR imaging. While the latter ...
Lung transplants and perfusion - latimes
The perfusion technique essentially repairs damage caused by swelling or inflammation in the lung, Dark said. That opens the ... Keshavjee and his team used the Toronto XVIVO Lung Perfusion System, which was designed for this purpose. The system is being ... Lungs, however, provide a unique opportunity because they are greatly needed and appear so amenable to perfusion treatment, ... with perfusion for four hours and transplanted 20 of them that looked viable after the treatment. Surgery outcomes were ...
Project MUSE - A Perfusion of Signs
This collection celebrates the founding of the Semiotics Society of America. The ten essays cover various aspects of semiotics, ranging from its medical foundations to philosophical concerns, logic, the arts, and social science perspectives. The title echoes a remark by the great American founder of the modern theory of signs, C. S. Peirce, who argued that the entire universe is perfused with signs, if not composed exclusively of them. Accordingly, the theme that runs through this endeavor is that of global unity underlying variety, and a spirit of ecumenicalism that, more and more, characterizes contemporary semiotics. However, the specific ways in which signs function in the different arts and sciences are also clearly brought out. Contributors are Diana Agrest, Paul Bouissac, Mario Gandelsonas, Henry Hiz, James D. Meltzer, Jean-Jacques Nattiez, Erik Schwimmer, Thomas A. Sebeok, Harley C. Shands, Edward Stankie-wicz, Rulon Wells, and J. Jay Zeman ...
Renal perfusion scintiscan: MedlinePlus Medical Encyclopedia
A renal perfusion scintiscan is a nuclear medicine test. It uses a small amount of a radioactive substance to create an image ... Renal perfusion scintigraphy; Radionuclide renal perfusion scan; Perfusion scintiscan - renal; Scintiscan - renal perfusion ... A renal perfusion scintiscan is a nuclear medicine test. It uses a small amount of a radioactive substance to create an image ...
Adenosine Agonist for Stress Perfusion Imaging Approved
Lexiscan was approved based on two identical phase 3 trials  in which the agent produced perfusion scans of similar quality ... Adenosine versus regadenoson comparative evaluation in myocardial perfusion imaging: Results of the ADVANCE phase 3 multicenter ... for resting stress-myocardial perfusion scans, the products developer and owner CV Therapeutics and marketer-distributor ...
Pulmonary ventilation/perfusion scan: MedlinePlus Medical Encyclopedia
A pulmonary ventilation/perfusion scan involves two nuclear scan tests to measure breathing (ventilation) and circulation ( ... The perfusion scan measures the blood supply through the lungs.. A ventilation and perfusion scan is most often done to detect ... V/Q scan; Ventilation/perfusion scan; Lung ventilation/perfusion scan; Pulmonary embolism - V/Q scan; PE- V/Q scan; Blood clot ... During the perfusion scan, a health care provider injects radioactive albumin into your vein. You are placed on a movable table ...
Dropbox - Xvivo.Perfusion.2019-02-19.pdf
Bowman Perfusion Monitor
The Bowman Perfusion Monitor runs continuously and displays perfusion data from the previous 1-10 days. In the automatic ( ... Coronary Artery Perfusion Cannulae with Balloon. 5. DLP® Coronary Perfusion Adapter, Y-Type. 6. DLP® Multiple Perfusion Sets. 7 ... Bowman Perfusion Monitor. Features. Absolute, real-time continuous perfusion measured from 0 to 200 ml/100g-min. Works with the ... The Bowman Perfusion Monitor runs continuously and displays perfusion data from the previous 1-10 days. In the automatic ( ...
Nuclear Magnetic Resonance (NMR) Imaging of Perfusion | SpringerLink
Wendt R.E. (1987) Nuclear Magnetic Resonance (NMR) Imaging of Perfusion. In: Pegg D.E., Karow A.M. (eds) The Biophysics of ... D. Le Bihan, E. Breton, M. Gueron, B. Roger, and M. Laval-Jeantet, Separation of Perfusion and Diffusion in Intra-Voxel ... Then, the work of Le Bihan on NMR imaging of perfusion is described. ... Applications to Diffusion and Perfusion in Neurological Disorders, Radiology 161:401 (1986).PubMedGoogle Scholar ...
What Is Renal Perfusion? | Reference.com
Renal perfusion is a term used to describe blood flow to the kidneys and is commonly assessed with a test called renal ... What Is Myocardial Perfusion Imaging?. A: Myocardial perfusion imaging is a noninvasive test that reveals the ability of blood ... Renal perfusion is a term used to describe blood flow to the kidneys and is commonly assessed with a test called renal ... In the case of renal perfusion assessment, a renal blood flow scan can help find blockages or narrowing of blood flow to the ...
... imaging (MPI) is a common test method to diagnose functional CAD. Many hospitals use techniques as SPECT ... Approaches that are more novel include MR and high-end CT perfusion imaging. In multimodal MPI, the distribution of a ... Last year we have developed a first prototype dynamic myocardial perfusion phantom and performed initial tests in CT ... which encompasses the development of a novel dynamic myocardial perfusion phantom. In this way, we can execute ground truth ...
Inflatable perfusion catheter - WANG; JAMES C.
A perfusion catheter for insertion into a body conduit, especially an artery. The catheter comprises a shaft (5) having at ... Such catheters are called balloon perfusion catheters. Commonly such perfusion catheters have a perfusion shaft with a ... 1. A perfusion catheter for insertion into a body conduit, said catheter comprising: a shaft having at least one lumen for ... 7. A perfusion catheter for insertion into a body conduit, said catheter comprising: a shaft having at least one lumen for ...
Myocardial Perfusion SPECT: Background, Indications, Contraindications
encoded search term (Myocardial Perfusion SPECT) and Myocardial Perfusion SPECT What to Read Next on Medscape. Related ... Myocardial Perfusion SPECT. Updated: Feb 24, 2016 * Author: Ricardo Cardona, MD; Chief Editor: Gowthaman Gunabushanam, MD, FRCR ... Myocardial perfusion imaging has the highest average effective dose (15.6 mSv) and the highest percentage (22.1%) of all ... Exercise myocardial perfusion SPECT in patients without known coronary artery disease: incremental prognostic value and use in ...
Coiled, perfusion balloon catheter - ARNEY; MICHELLE
A perfusion balloon catheter includes an inflatable balloon formed by a series of loops of a flexible, inflatable tube in a ... 2. The perfusion balloon catheter of claim 1 wherein the support structure is a coiled support member. 3. The perfusion balloon ... The perfusion balloon catheter of claim 20 wherein the perfusion passage has an opening, upon inflation of the balloon, with a ... 9. The perfusion balloon catheter of claim 7 wherein the perfusion passage has an opening, upon inflation of the balloon, with ...
Brain Perfusion Scan | Johns Hopkins Medicine
There are several different types of brain perfusion scans. ... A brain perfusion scan is a type of brain test that shows the ... Some types of brain perfusion scans, such as MRI perfusion or CT perfusion, dont need a radiotracer. They use a nonradioactive ... What is a brain perfusion scan?. A brain perfusion scan is a type of brain test that shows the amount of blood taken up in ... Why might I need a brain perfusion scan?. You might need a brain perfusion scan if your healthcare provider needs information ...
Reversible perfusion defect - Heart Disease - MedHelp
reversible perfusion defect in anterior wall, fixed perfusion defect ininterior wall, normal perfusion in remaining myocardium ... reversible perfusion defect in anterior wall, fixed perfusion defect ininterior wall, normal perfusion in remaining myocardium ... QUOTE:...reversible perfusion defect in anterior wall, fixed perfusion defect ininterior wall, normal perfusion in remaining ... QUOTE:...reversible perfusion defect in anterior wall, fixed perfusion defect ininterior wall, normal perfusion in remaining ...
ASNC Publishes Updated Statement on Myocardial Perfusion Imaging in Women
Percutaneous Hepatic Perfusion | Moffitt
Percutaneous hepatic perfusion is just one of the advanced therapies offered by physicians at Moffitt as part of our commitment ... Percutaneous hepatic perfusion (PHP) is a minimally invasive treatment that delivers high-dose chemotherapy directly to ... At Moffit Cancer Center, percutaneous hepatic perfusion is offered to treat melanoma that has spread to the liver (as often ... To learn more about percutaneous hepatic perfusion or any of the other advanced melanoma treatments offered at Moffitt Cancer ...
perfusion - Symptoms, Treatments and Resources for perfusion
Intrahemispheric Perfusion in Chronic Stroke-Induced Aphasia
Figure 3: ROIs with greater perfusion (hyperperfusion; red-yellow color scale) and lesser perfusion (hypoperfusion; blue-green ... ns). Perfusion also was significantly lower in the 0-6 mm ROI than in the 6-12 mm ROI (. , ). ... Furthermore, for the aphasic group, right hemisphere perfusion was significantly higher than left hemisphere perfusion. These ... Another more likely interpretation is that, because increased perfusion reflects increases in neuronal energy usage, perfusion ...
Patente US6503224 - Perfusion balloon catheter - Google Patentes
... and a magnetically driven impeller disposed in the perfusion lumen to increase blood flow through the catheter and the arteries ... A balloon catheter having a perfusion lumen communicating with a blood vessel, ... Intracatheter perfusion pump apparatus and method. US5108370. 3 Oct 1989. 28 Abr 1992. Paul Walinsky. Perfusion balloon ... Helical balloon perfusion angioplasty catheter. US5226888. 25 Oct 1991. 13 Jul 1993. Michelle Arney. Coiled, perfusion balloon ...
Intrahemispheric Perfusion in Chronic Stroke-Induced Aphasia
... Cynthia K. Thompson,1,2,3 Matthew Walenski,1,2 YuFen Chen,1,4 ... Using MRI, we examined perfusion in the right and left hemispheres of 35 aphasic and 16 healthy control participants. Across 76 ... These findings underscore the need to consider cerebral perfusion as a factor contributing to language deficits in chronic ... Stroke-induced alterations in cerebral blood flow (perfusion) may contribute to functional language impairments and recovery in ...
ISMRM - Diffusion, Perfusion, fMRI Videos
CT perfusion in acute stroke
... the potential clinical applications of CT perfusion (CTP) imaging in the diagnosis, triage, and therapeutic monitoring of these ... CT perfusion in acute stroke Neuroimaging Clin N Am. 2005 Aug;15(3):481-501, ix. doi: 10.1016/j.nic.2005.08.004. ... As new treatments are developed for stroke, the potential clinical applications of CT perfusion (CTP) imaging in the diagnosis ...
Machine perfusion - Wikipedia
"The use of electron microscopy in renal preservation and perfusion." In: Norman JC, ed. Organ perfusion and preservation. New ... "Etiology of Rising Perfusion Pressure in Isolated Organ Perfusion". Annals of Surgery. 168 (3): 382-391. doi:10.1097/00000658- ... Machine perfusion (MP) is a technique used in organ transplantation as a means of preserving the organs which are to be ... Machine perfusion has various forms and can be categorised according to the temperature of the perfusate: cold (4 °C) and warm ...
Patent US6183492 - Perfusion-isolation catheter apparatus and method - Google Patents
Agent delivery perfusion catheter. US20080243066 *. 30 Mar 2007. 2 Oct 2008. Boston Scientific Scimed, Inc.. Perfusion and ... Perfusion Device. US20080243170 *. 30 Mar 2007. 2 Oct 2008. Boston Scientific Scimed, Inc.. Embolic capturing devices and ... Perfusion and embolic protection. US7780628. 1 May 2000. 24 Aug 2010. Angiodynamics, Inc.. Apparatus and methods for treating ... Blood perfusion balloon catheter. US5378237. 27 Feb 1992. 3 Jan 1995. Laboratoire Nycomed Ingenop Sa. Dilatation catheter for ...
Computed tomographyCardiacTissueMachine perfusionSPECTImagingCatheterBrain perfusionCoronary PerfusionBoard of Cardiovascular PerfusionAssessmentClinicalScanAbnormalitiesAssess myocardial perfusionStress-myocardial perfusionAntegrade cerebral perfusionEvaluate myocardial perfusionRegional myocardial perfusionCardiovascular Perfusion Program2019Percutaneous hepatic pBioreactorMeasurementsPoor perfusionNormal perfusionMinimallyLungBalloonQuantitativeRenalPulmonaryLiverPatientsCirculationExtracorporealLumenVentilationProceduresBloodAorticClaim 1 whereinMyocardial infarctionTraumatic brainTherapyDeficitsHypothermicCardiothoracicPhysiologyIschemiaTechniqueContinuous
- Comparison of admission perfusion computed tomography and qualitative diffusion- and perfusion weighted magnetic resonance imaging in acute stroke patients. (springer.com)
- Other tests, such as the computed tomography (CT) perfusion or magnetic resonance imaging (MRI) perfusion, do not use radiotracers. (hopkinsmedicine.org)
- Providers often superimpose brain perfusion images with other types of standard imaging tests, such as a computed tomography (CT) scan. (hopkinsmedicine.org)
- Perfusion of various tissues can be readily measured in vivo with nuclear medicine methods which are mainly positron emission tomography (PET) and single photon emission computed tomography (SPECT). (wikipedia.org)
- To compare prospectively the accuracy of spiral computed tomography (CT) with that of ventilation-perfusion scintigraphy for diagnosing pulmonary embolism. (nih.gov)
- Perfusion computed tomography (CT) is a relatively new technique that allows rapid qualitative and quantitative evaluation of cerebral perfusion by generating maps of cerebral blood flow (CBF), cerebral blood volume (CBV), and mean transit time (MTT). (nih.gov)
- This document addresses the use of perfusion-computed tomography for cerebral perfusion imaging. (unicare.com)
- Perfusion-computed tomography (CT) was developed to assist in the evaluation of cerebral blood flow. (unicare.com)
- Cerebral perfusion-computed tomography is considered investigational and not medically necessary for all indications including, but not limited to, the evaluation of cerebral ischemia. (unicare.com)
- In equations, the symbol Q is sometimes used to represent perfusion when referring to cardiac output . (wikipedia.org)
- However, this terminology can be a source of confusion since both cardiac output and the symbol Q refer to flow (volume per unit time, for example, L/min), whereas perfusion is measured as flow per unit tissue mass (mL/(min·g)). Microspheres that are labeled with radioactive isotopes have been widely used since the 1960s. (wikipedia.org)
- The Gadolinium-enhanced first pass cardiac inspection method is used to detect the difference of myocardial perfusion. (innovations-report.com)
- Coronary perfusion pressure correlates with the coronary blood flow and determines the outcome during a cardiac arrest. (ehow.co.uk)
- Minus the aortic diastole pressure from the left ventricular diastolic pressure and it gives the cardiac perfusion pressure rate. (ehow.co.uk)
- Last week I had a cardiac perfusion test at a local hospital. (healingwell.com)
- What is the efficacy of myocardial perfusion imaging for cardiac assessment? (medscape.com)
- The cardiac perfusion team at the DHZB is constantly researching developing treatment concepts, participates in multicentric studies and regularly takes part in specialist conferences. (dhzb.de)
- The results come from the international, multicenter Myocardial Perfusion CMR Versus Angiography and FFR to Guide the Management of Patients With Stable Coronary Artery Disease (MR-INFORM) trial, which also found that cardiovascular MRI was no better than the angiography-FFR approach in predicting major adverse cardiac events at one-year follow-up. (auntminnie.com)
- We hypothesized that an initial management strategy based on myocardial perfusion cardiovascular MRI would be noninferior to a strategy guided by invasive angiography and FFR in terms of major adverse cardiac events. (auntminnie.com)
- In patients with stable angina and risk factors for coronary artery disease, an initial management strategy guided by myocardial perfusion cardiovascular MRI was noninferior to a strategy of invasive angiography and FFR with regard to major adverse cardiac events at 12 months," the authors wrote. (auntminnie.com)
- Continuous coronary perfusion during Norwood reconstruction offers the theoretic advantage of less postoperative cardiac dysfunction. (nih.gov)
- The first speaker (Dr D. Pennell form London - UK) showed the great potential of cardiac MR (CMR) in the assessment of myocardial perfusion. (escardio.org)
- Graduates are eligible to write the certification examinations of the Canadian Society of Clinical Perfusion and the American Board of Cardiovascular Perfusion and are employed in cardiac surgery centres across Canada and the United States. (michener.ca)
- Because CS reflects a state of hypoperfusion induced by heart failure, management of CS should aim at improving cardiac function as well as at optimization of tissue perfusion. (biomedsearch.com)
- Perfusion is the passage of fluid through the circulatory system or lymphatic system to an organ or a tissue ,  usually referring to the delivery of blood to a capillary bed in tissue. (wikipedia.org)
- Perfusion is measured as the rate at which blood is delivered to tissue,  or volume of blood per unit time (blood flow ) per unit tissue mass. (wikipedia.org)
- Measuring tissue perfusion is valuable for diagnosis and treatment monitoring in numerous diseases. (tue.nl)
- The first part of the perfusion study ( Maarten Heres ) is to examine the feasibility of Photo-acoustic (PA) imaging as a tool for quantitative measurements on tissue perfusion. (tue.nl)
- : measuring muscle perfusion This technique is very sensitive for the detection of moving blood in deeper lying tissue, such as the skeletal muscles. (tue.nl)
- The difference between diffusion and perfusion abnormalities provides a measure of the ischemic penumbra or the brain tissue that has been injured but has reversible ischemia. (springer.com)
- Predicting tissue outcome in acute human cerebral ischemia using combined diffusion- and perfusion-weighted MR imaging. (springer.com)
- About 85% of lungs made available for donation are not used due to tissue damage that potentially could be repaired with perfusion or other techniques. (latimes.com)
- Absolute tissue perfusion, as well as tissue temperature, is displayed graphically as a function of time throughout the measurement sequence. (bio-medicine.org)
- Prestroke perfusion levels, however, may not be regained in all regions of the brain, leaving uninfarcted tissue hypoperfused well past the acute stage. (hindawi.com)
- Skin and tissue perfusion measurements are important parameters for diagnosis of wounds and burns, and for monitoring plastic and reconstructive surgeries. (mit.edu)
- Consequently, techniques to provide rapid vascularization and perfusion of tissue engineered constructs should be incorporated into the tissue or organ design. (google.com)
- The extracellular-space extra-vascular space volume (Ve%) in ml is a quantitative perfusion parameter that is related to the tissue cellularity. (clinicaltrials.gov)
- Laser Doppler flowmetry (LDF) offers a continuous measurement of blood cell perfusion in the microcirculatory beds of skin tissue and other tissues without influencing the blood perfusion. (adinstruments.com)
- The Laser Doppler Flowmeter provides a relative measure of tissue perfusion in the measurement area immediately surrounding the probe. (adinstruments.com)
- If repeated measurements over longer period are to be compared, the best approach is to use a challenge to the tissue to prompt a dynamic response in perfusion (temperature or occlusion challenges being the most frequently utilized). (adinstruments.com)
- Thank you for your interest in Tissue Perfusion . (adinstruments.com)
- Whereas prior research has shown declines in blood flow, blood volume, or PSP after chemoradiation therapy for certain types of cancer, Hamdy and colleagues are reporting greater increases in tissue perfusion for pancreatic cancer patients who responded to treatment, compared with those who did not. (auntminnie.com)
- Abstract This project will develop and demonstrate a prototype Modular Perfusion Bioreactor (MPB) for tissue engineering applications. (sbir.gov)
- The research team optimized a machine-perfusion (MP) device that was developed by Organ Assist, a company in the Netherlands, and added a fluid with a hemoglobin-oxygen carrier component to deliver high concentrations of oxygen to the tissue. (eurekalert.org)
- Bose Corporation has introduced the 3DCulturePro™ system, a new multi-specimen perfusion bioreactor designed for biologists, biomedical researchers and scientists who require reproducible and reliable tissue growth. (news-medical.net)
- Retrieved on November 25, 2020 from https://www.news-medical.net/news/20141112/New-multi-specimen-perfusion-bioreactor-for-reliable-tissue-growth-introduced-by-Bose.aspx. (news-medical.net)
- The perfusion should be stopped when the liver tissue become soft and cracks after touching it with forcepts). (protocol-online.org)
- Management of cardiogenic shock: focus on tissue perfusion. (biomedsearch.com)
- Perfusion CT is routinely used during the hyperacute phase of patients suffering from stroke to diagnose areas of penumbra (poorly perfused but still viable brain tissue) that may benefit from revascularization. (intechopen.com)
- Machine perfusion (MP) is a technique used in organ transplantation as a means of preserving the organs which are to be transplanted. (wikipedia.org)
- Machine perfusion has various forms and can be categorised according to the temperature of the perfusate: cold (4 °C) and warm (37 °C). Machine perfusion has been applied to renal transplantation, liver transplantation and lung transplantation. (wikipedia.org)
- This important study confirms the critical role that transportable machine perfusion can play in improving kidney transplant outcomes," said David Kravitz, Chief Executive Officer of Organ Recovery Systems, the manufacturer of LifePort. (emaxhealth.com)
- The international trial enrolled kidney pairs from 336 consecutive deceased donors in Europe and randomly assigned one kidney to machine perfusion and the other to static storage. (emaxhealth.com)
- Results showed that the odds of a delay in kidney function post transplant were reduced by almost half when machine perfusion was used compared with static cold storage. (emaxhealth.com)
- The ex vivo liver machine perfusion has recently emerged as a promising novel strategy to not only decrease the ischemia time, but also serve as a tool to predict the post-transplant viability of donor livers, and thus decreasing the graft discard rate, while ruling out the "futile" liver transplants. (frontiersin.org)
- Furthermore, the addition of organ protective strategies and stem cell research to machine perfusion to maximize the advantages towards better outcomes is another exciting field of focus. (frontiersin.org)
- The scope of this specific collection includes clinical trials, case-series, narrative reviews, systematic reviews, meta-analyses, case reports as well as experimental animal research and involves all research aspects of ex vivo machine perfusion technology, including but not limited to, the hypothermic, subnormothermic and normothermic machine perfusion as well as controlled oxygenated rewarming. (frontiersin.org)
- The findings, which were published online in the American Journal of Transplantation , suggest that it's possible to use the technique of "machine perfusion" with a newly created cell-free oxygenated solution to expand the number of high-quality livers available for transplant, thereby shortening waiting times and reducing patient mortality. (eurekalert.org)
- The OPTN began collecting data (from the Deceased Donor Registration) on the percentage of donor organs intended for ex vivo normothermic machine perfusion (NMP) and their location four years ago. (unos.org)
- Some brain perfusion scans (such as SPECT, PET, and CT) also expose you to radiation. (hopkinsmedicine.org)
- BALTIMORE -- SPECT myocardial perfusion imaging (MPI) is as accurate among women as men, according to data from a meta-analysis presented here. (medpagetoday.com)
- SPECT myocardial perfusion imaging (MPI) is as accurate among women as men. (medpagetoday.com)
- Furthermore, he also mentioned the capability of SPECT to obtain quantitative measurements of myocardial perfusion as clearly shown by different groups. (escardio.org)
- Magnetic resonance perfusion-weighted imaging is a more sensitive method than conventional CT and MR imaging. (springer.com)
- Perfusion imaging is positive immediately following an acute stroke. (springer.com)
- 2006). Magnetic resonance imaging profiles predict clinical response to early reperfusion: The diffusion and perfusion imaging evaluation for understanding stroke evolution (DEFUSE) study. (springer.com)
- 2015). Endovascular therapy for ischemic stroke with perfusion-imaging selection. (springer.com)
- Roth E. (2018) Perfusion-Weighted Imaging. (springer.com)
- Myocardial perfusion imaging , medical procedure that uses radioactive tracers, primarily thallium , to detect abnormalities in the blood supply to the heart muscle . (britannica.com)
- Adenosine versus regadenoson comparative evaluation in myocardial perfusion imaging: Results of the ADVANCE phase 3 multicenter international trial. (medscape.com)
- Adenosine Agonist for Stress Perfusion Imaging Approved - Medscape - Apr 15, 2008. (medscape.com)
- Then, the work of Le Bihan on NMR imaging of perfusion is described. (springer.com)
- D. Le Bihan, E. Breton, M. Gueron, B. Roger, and M. Laval-Jeantet, Separation of Perfusion and Diffusion in Intra-Voxel Incoherent Motion (IVIM) MR Imaging, Fifth Annual Meeting, Society of Magnetic Resonance in Medicine (1986). (springer.com)
- Myocardial perfusion imaging (MPI) is a common test method to diagnose functional CAD. (utwente.nl)
- Approaches that are more novel include MR and high-end CT perfusion imaging. (utwente.nl)
- Future applications of this next generation phantom are extensive: from facilitation in the validation process of quantification software packages, to realization of inter- and intramodal comparison of dynamic MPI applications and imaging protocol optimization in novel CT perfusion approaches. (utwente.nl)
- [ 1 ] and the first application of thallium-201 myocardial perfusion imaging by Elliot Lebowitz. (medscape.com)
- The American Society of Nuclear Cardiology (ASNC) has published an updated consensus statement on evidence-based treatment of stress myocardial perfusion imaging (MPI) in women. (prweb.com)
- The consensus statement, "Myocardial perfusion imaging in women for the evaluation of stable ischemic heart disease-state-of-the-art evidence and clinical recommendations," is intended to guide appropriate use of nuclear cardiology in the evaluation of women presenting with symptoms consistent with stable ischemic heart disease (SIHD). (prweb.com)
- As new treatments are developed for stroke, the potential clinical applications of CT perfusion (CTP) imaging in the diagnosis, triage, and therapeutic monitoring of these diseases are certain to increase. (nih.gov)
- 1560. Qualitative Magnetic Resonance Perfusion Imaging in Patients with Coronary Artery Disease, G.R. Cherryman, P.R. Sensky, A. Jivan, C. Reek and N.J. Samani, University of Leicester, Glenfield General Hospital NHS Trust, Leicester, UK. (ismrm.org)
- 1564. How Good is Qualitative Analysis of 1st Pass Gd-DTPA Multislice Myocardial Perfusion Imaging for Clinical Evaluation? (ismrm.org)
- Because myocardial perfusion imaging increases the diagnostic accuracy of stress testing, the American College of Cardiology and American Heart Association (ACC/AHA) guidelines recommend that it be used in several patient subsets. (medscape.com)
- In addition, myocardial perfusion imaging should always be used as an adjunct when pharmacologic stress testing is performed. (medscape.com)
- A difficulty that commonly arises is when there is disagreement between the ECG evidence and myocardial perfusion imaging on a stress test. (medscape.com)
- Myocardial perfusion is an imaging test. (hopkinsmedicine.org)
- Recent research has demonstrated that more advanced modalities such as PET/CT, PET/MRI, and perfusion imaging are better equipped to stage cancer and determine a patient's response to chemoradiation therapy, the authors continued. (auntminnie.com)
- Myocardial perfusion imaging is a test to look at the blood flow and function of the heart. (stdavids.com)
- Myocardial perfusion imaging is used to look for any damage to your heart. (stdavids.com)
- A method of deriving blood perfusion indices for a region of interest (ROI) of a subject, comprising the steps of administering a contrast agent to the subject during a dynamic imaging scan, converting signal intensity data from raw images of the scan into contrast agent concentration data, deriving. (google.ca)
- MONTREAL, Sept. 20 -- Medicare doesn't reimburse for perfusion imaging in a large proportion of patients who, by Framingham standards, are considered high risk for coronary disease, according to a recent chart review. (medpagetoday.com)
- Medicare practice and reimbursement guidelines for use of myocardial perfusion imaging (MPI) are missing a large proportion of patients who are statistically at high risk for coronary events, reported Eric Dandes, a clinical research coordinator at the Cleveland Clinic in Weston, Fla., in a poster presentation at the American Society of Nuclear Cardiology meeting here. (medpagetoday.com)
- This imaging modality takes the name of perfusion CT. (intechopen.com)
- In 2008, Provenzale and colleagues published a systematic review of both CT and MRI perfusion imaging in the assessment of acute cerebrovascular disease. (unicare.com)
- Studies in category 2 and 3 essentially validate perfusion imaging as a test and provide information that could be used in decision making. (unicare.com)
- Category 4 included articles that documented the effect of treatment on the perfusion imaging deficits, but this information was not used to guide the clinical management of individuals. (unicare.com)
- Category 8 described research studies where results of perfusion imaging defined trial eligibility. (unicare.com)
- A perfusion catheter for insertion into a body conduit, especially an artery. (freepatentsonline.com)
- 2. The perfusion catheter according to claim 1 wherein said channels extend into the distal ends of each of the balloons and the channels are separated from each other by webs whereby to form a proximal intermediate member and said opening is in at least one of said webs. (freepatentsonline.com)
- A perfusion balloon catheter includes an inflatable balloon formed by a series of loops of a flexible, inflatable tube in a generally cooperative tubular shape. (freepatentsonline.com)
- 2. The perfusion balloon catheter of claim 1 wherein the support structure is a coiled support member. (freepatentsonline.com)
- 3. The perfusion balloon catheter of claim 2 wherein the retainer means includes a wire which extends through the coiled support member to capture loops of the tube in the coiled support member. (freepatentsonline.com)
- 4. The perfusion balloon catheter of claim 3 wherein a first length of tube is inside the coiled support member. (freepatentsonline.com)
- 5. The perfusion balloon catheter of claim 4 wherein the proximal end of the tube is positioned within the shaft lumen. (freepatentsonline.com)
- 6. The perfusion balloon catheter of claim 5 wherein a second length of the tube extends outside of the coiled support member and is looped around the coiled support member to form a plurality of adjacent loops which cooperate to form the inflatable balloon. (freepatentsonline.com)
- 7. The perfusion balloon catheter of claim 6 wherein the tubular-shaped balloon has an inner diameter which is larger than an outer diameter of the coiled support member thereby forming the perfusion passage, which extends from a proximal end to a distal end of the balloon. (freepatentsonline.com)
- A balloon catheter having a perfusion lumen communicating with a blood vessel, and a magnetically driven impeller disposed in the perfusion lumen to increase blood flow through the catheter and the arteries. (google.es)
- The catheter includes a brace fitted over the balloon for restricting expansion of a selected portion of the balloon for forming a perfusion channel that allows fluid to be perfused past the balloon when it is expanded in a body vessel. (google.co.uk)
- 2. The perfusion catheter of claim 1 , wherein said remaining portion of the exterior surface, when said balloon is in its collapsed condition, has a radial extent which is substantially no greater than the radial extent of said brace. (google.co.uk)
- 3. The perfusion catheter of claim 1 , wherein said remaining portion of the exterior surface is spaced radially outwardly from said brace when said balloon is in its expanded condition. (google.co.uk)
- 4. The perfusion catheter of claim 1 , wherein said brace includes a pair of spaced rings connected by a helical member that extends substantially the entire length of the balloon. (google.co.uk)
- 5. The perfusion catheter of claim 1 , wherein said means for passing fluid includes at least one pathway between said tubular shaft and said balloon. (google.co.uk)
- 6. The perfusion catheter of claim 1 , wherein said balloon is integrally formed with said tubular shaft. (google.co.uk)
- 7. The perfusion catheter of claim 1 , wherein said brace includes a pair of spaced rings connected by at least one longitudinally extending strut. (google.co.uk)
- 8. The perfusion catheter of claim 1 , wherein said balloon is constructed of a relatively compliant material. (google.co.uk)
- 9. The perfusion catheter of claim 1 , wherein said perfusion brace is radially spaced from said tubular shaft when said balloon is in its collapsed condition. (google.co.uk)
- In particular, the present invention relates to a balloon catheter which permits prolonged inflation of the balloon within a blood vessel, such as a coronary artery, without blocking blood flow by utilizing passive perfusion. (google.ca)
- A guidewire for use in combination with a balloon catheter having a guidewire lumen disposed distal of the balloon, wherein the guidewire defines a perfusion lumen extending from a point proximal of the balloon to a point distal of the balloon such that blood may perfuse across the balloon when inflated. (google.es)
- What is a brain perfusion scan? (hopkinsmedicine.org)
- A brain perfusion scan is a type of brain test that shows the amount of blood taken up in certain areas of your brain. (hopkinsmedicine.org)
- There are several different types of brain perfusion scans. (hopkinsmedicine.org)
- During a brain perfusion scan using a radiotracer, your healthcare provider will inject a radiotracer into a vein in your arm. (hopkinsmedicine.org)
- The brain perfusion scan can show which areas of your brain received most of this radioactive substance. (hopkinsmedicine.org)
- Some types of brain perfusion scans, such as MRI perfusion or CT perfusion, don't need a radiotracer. (hopkinsmedicine.org)
- Why might I need a brain perfusion scan? (hopkinsmedicine.org)
- You might need a brain perfusion scan if your healthcare provider needs information about how the blood is flowing in your brain. (hopkinsmedicine.org)
- You also might need a brain perfusion scan if you need an operation on one of the vessels in your brain or neck and your healthcare provider wants to examine the flow of blood through your brain. (hopkinsmedicine.org)
- What are the risks of a brain perfusion scan? (hopkinsmedicine.org)
- Most people don't have any trouble with their brain perfusion scan. (hopkinsmedicine.org)
- Your healthcare provider will only recommend these brain perfusion scans if your risks from not getting the test are greater than the risks of the test itself. (hopkinsmedicine.org)
- Talk to your healthcare provider about the possible risks of your brain perfusion scan. (hopkinsmedicine.org)
- Your risks may vary according to your medical conditions, the reason for your scan, and the exact type of brain perfusion scan you receive. (hopkinsmedicine.org)
- How do I get ready for a brain perfusion scan? (hopkinsmedicine.org)
- Your healthcare provider will provide further instructions based on the specific type of brain perfusion scan you'll be receiving. (hopkinsmedicine.org)
- Whole-brain perfusion CT patterns. (mendeley.com)
- Geiger-A. Correlation of brain metabolism and function by use of a brain perfusion method in situ. (bio.net)
- Geiger-A. Technique of brain perfusion in situ. (bio.net)
- Coronary perfusion pressure is the pressure gradient between the right atrial diastolic pressure and the aortic diastole pressure. (ehow.co.uk)
- Coronary perfusion pressure is extremely beneficial when administering CPR as it shows the flow of blood to the heart muscle. (ehow.co.uk)
- Coronary perfusion pressure therefore determines whether the CPR is adequately being performed and maintaining appropriate perfusion to the heart muscle. (ehow.co.uk)
- Coronary perfusion pressure can also indicate blockages, oxygen consumption of the heart muscle and heart failure. (ehow.co.uk)
- With the ultimate goal of providing insight into the potential for achieving transmyocardial perfusion in human hearts, we studied the relative contribution of transmyocardial and coronary perfusion in alligator hearts. (ahajournals.org)
- Norwood reconstruction using continuous coronary perfusion: a safe and translatable technique. (nih.gov)
- Continuous coronary perfusion was provided by a cannula inserted into the proximal aorta. (nih.gov)
- This study presents the largest series of Norwood operations in which the entire aorta is augmented while delivering continuous coronary perfusion. (nih.gov)
Board of Cardiovascular Perfusion1
- Medtronic, a primary corporate sponsor, supports the European Board of Cardiovascular Perfusion (EBCP) in bringing together at an international level perfusionists and allied health professionals to discuss standards and learn about technology updates and changes. (medtronic.com)
- Tests verifying that adequate perfusion exists are a part of a patient's assessment process that are performed by medical or emergency personnel. (wikipedia.org)
- The second track of this study is the assessment of skeletal muscle perfusion during exercise, using PD ultrasound. (tue.nl)
- In the case of renal perfusion assessment, a renal blood flow scan can help find blockages or narrowing of blood flow to the kidneys. (reference.com)
- Images taken during dynamic exercise or pharmacologically induced stress (using vasodilators such as adenosine or beta-agonist such as dobutamine) and rest injections enable independent assessment of myocardial perfusion and viability. (medscape.com)
- Perfusion CT has also been used for assessment of cerebrovascular reserve by using acetazolamide challenge in patients with intracranial vascular stenoses who are potential candidates for bypass surgery or neuroendovascular treatment, for the evaluation of patients undergoing temporary balloon occlusion to assess collateral flow and cerebrovascular reserve, and for the assessment of microvascular permeability in patients with intracranial neoplasms. (nih.gov)
- The clinical question that we want to answer is whether the muscle perfusion might be the limiting factor in exercise tolerance for heart failure patients. (tue.nl)
- The M.S. in Cardiovascular Perfusion is a 24-month program integrating didactic and clinical courses with practica which provide the necessary entry level skills in cardiovascular perfusion. (liunet.edu)
- Students successfully completing the program will receive a certificate of completion from the North Shore University Hospital School of Cardiovascular Perfusion, and are eligible to sit for the national board certifying examination in Clinical Perfusion. (liunet.edu)
- 1565. Clinical Application of Myocardial Perfusion Post PTCA with SE-EPI, F.B. Gao, Y.G. Gao, B.S. Qiu, Y. Liang, Y.Q. Cai and X.Y. Ma, PLA General Hospital and GE Medical Systems China, Beijing, China. (ismrm.org)
- This new MSc programme is born of an exciting partnership between the University of Bristol and the Society of Clinical Perfusion Scientists of Great Britain and Ireland . (bristol.ac.uk)
- The programme will develop your interest and understanding of perfusion science, deepen your knowledge of clinical applications and provide a unique insight into research through a two-month research project. (bristol.ac.uk)
- This programme is only available to students who have secured a clinical perfusion scientist trainee position at an accredited training centre in Great Britain or Ireland. (bristol.ac.uk)
- The patterns of perfusion abnormalities on CBV, CBF, and MTT maps were analyzed and were related to clinical presentation and cerebral angiography. (mendeley.com)
- Cardiovascular Perfusion Clinical 4 is a continuation of PERF 8300 . (bcit.ca)
- In this clinical course, students will continue to review and apply the objectives introduced in previous rotations, as well as prepare and apply advanced Perfusion techniques and technologies. (bcit.ca)
- This Clinical Practicum is reserved for students who have been accepted into the Cardiovascular Perfusion Advanced Specialty Certificate program. (bcit.ca)
- Interested in being notified about future offerings of PERF 8400 - Cardiovascular Perfusion Clinical 4 ? (bcit.ca)
- In clinical practice, the regional differences in perfusion during SACP may be of pathogenic importance in focal cerebral ischaemia. (diva-portal.org)
- This article is a review of the technique, clinical applications, and controversies surrounding perfusion CT. (nih.gov)
- The fourth speaker (Dr Schindler form Geneva - Switzerland) had the responsibility of defending Positron Emission Tomography (PET) which is considered the gold standard in the clinical evaluation of myocardial perfusion. (escardio.org)
- In clinical practice, perfusion CT requires the use of a non-diffusible indicator, such as an iodine contrast agent. (unicare.com)
- Perfusion CT (PCT, CT perfusion) can be performed with a diffusible gas indicator such as xenon (Xe), however in clinical practice an iodinated contrast agent is typically used, given the limited availability of medical grade Xe. (unicare.com)
- Of the categories listed above, only the first category, perfusion to guide treatment, clearly relates to clinical decision making. (unicare.com)
- The V/Q ratio can be measured with a ventilation/perfusion scan . (wikipedia.org)
- A pulmonary ventilation/perfusion scan involves two nuclear scan tests to measure breathing (ventilation) and circulation (perfusion) in all areas of the lungs. (medlineplus.gov)
- A pulmonary ventilation/perfusion scan is actually 2 tests. (medlineplus.gov)
- During the perfusion scan, a health care provider injects radioactive albumin into your vein. (medlineplus.gov)
- A chest x-ray is usually done before or after a ventilation and perfusion scan. (medlineplus.gov)
- You may feel a sharp prick when the IV is placed in the vein in your arm for the perfusion part of the scan. (medlineplus.gov)
- The perfusion scan measures the blood supply through the lungs. (medlineplus.gov)
- A ventilation and perfusion scan is most often done to detect a pulmonary embolus (blood clot in the lungs). (medlineplus.gov)
- The provider should take a ventilation and perfusion scan and then evaluate it with a chest x-ray. (medlineplus.gov)
- The risk with perfusion scan is the same as with inserting an intravenous needle for any other purpose. (medlineplus.gov)
- A pulmonary ventilation and perfusion scan may be a lower-risk alternative to pulmonary angiography for evaluating disorders of the lung blood supply. (medlineplus.gov)
- Other tests may be needed to confirm or rule out the findings of a pulmonary ventilation and perfusion scan. (medlineplus.gov)
- Lung scan, perfusion and ventilation (V/Q scan) - diagnostic. (medlineplus.gov)
- CCTA after negative stress echo and negative perfusion scan? (medhelp.org)
- The ventilation scan displays airflow and the movement of air in the lungs, while the perfusion scan displays blood flow in the lungs. (medic8.com)
- What is a myocardial perfusion scan? (hopkinsmedicine.org)
- A myocardial perfusion scan uses a tiny amount of a radioactive substance, called a radioactive tracer. (hopkinsmedicine.org)
- Why might I need a resting myocardial perfusion scan? (hopkinsmedicine.org)
- There may be other reasons for your healthcare provider to order a resting myocardial perfusion scan. (hopkinsmedicine.org)
- What are the risks of a resting myocardial perfusion scan? (hopkinsmedicine.org)
- How do I prepare for a resting myocardial perfusion scan? (hopkinsmedicine.org)
- A pulmonary ventilation/perfusion scan is actually two tests. (sutterhealth.org)
- There are no evaluations for Ventilation perfusion scan. (patientslikeme.com)
- Three types of extranidal brain parenchymal perfusion abnormalities were noted. (mendeley.com)
- In 2 patients, pre- and posttreatment PCT was performed, which showed improve- ment of perfusion abnormalities. (mendeley.com)
- CONCLUSIONS: Whole-brain PCT shows different patterns of perfusion abnormalities in patients with brain AVM. (mendeley.com)
- This thesis aimed to investigate cerebral metabolism and perfusion abnormalities in pigs during hypothermic circulatory arrest, selective antegrade cerebral perfusion (SACP) and extracorporeal circulation following progressive venous stasis. (diva-portal.org)
Assess myocardial perfusion2
- Over the years, both the equipment (second harmonic, pulsed power etc.) and the contrast agents (stability, dimension of microbubbles, etc) have been progressively improved in such a way that nowadays, it is realistic to envisage the use of contrast echocardiography to assess myocardial perfusion either in baseline condition (myocardial infarction, etc) or during stress. (escardio.org)
- Multislice CT was performed during the first pass of an intravenous bolus of 75 to 90 mL of low isomolar contrast material to assess myocardial perfusion and detect microvascular obstructions. (diagnosticimaging.com)
- April 15, 2008 (Palo Alto, CA and Deerfield, IL) - The US Food and Drug Administration has market-approved regadenoson (Lexiscan), a selective A 2A adenosine-receptor agonist, for resting stress-myocardial perfusion scans, the product's developer and owner CV Therapeutics and marketer-distributor Astellas Pharma US have jointly announced . (medscape.com)
Antegrade cerebral perfusion2
- The optimal blood flow level for selective antegrade cerebral perfusion (SACP) has not been established. (diva-portal.org)
- Selective antegrade cerebral perfusion (ACP) instead of DHCA during these complex operations may contribute to less cerebral damage, but literature is not conclusive on this issue. (clinicaltrials.gov)
Evaluate myocardial perfusion2
- This method was developed to evaluate myocardial perfusion and viability and is applied both at rest and after exercise or pharmacologic stress to assess inducible ischemia due to flow limiting coronary stenoses. (medscape.com)
- The third speaker (P. Nihoyannopoulos from London - UK) nicely reported to the audience the extreme flexibility of Echocardiography and the added values of ultrasound contrast agent (microbubbles) which can be used either to further increase the quality of images with the aim of a better definition of endocardial borders or to evaluate myocardial perfusion. (escardio.org)
Regional myocardial perfusion1
- Finally, the speaker opened the new window of 3D Echocardiography which looks extremely promising for the evaluation of regional myocardial perfusion partially reducing the operator dependency in acquiring images. (escardio.org)
Cardiovascular Perfusion Program6
- Admission into the Cardiovascular Perfusion Program at North Shore University Hospital in Manhasset, N.Y. (liunet.edu)
- The Cardiovascular Perfusion program at Michener is accredited by Accreditation Canada. (michener.ca)
- Learn more about the Michener Cardiovascular Perfusion Program, and how to become a cardiovascular perfusionist, by navigating the information below. (michener.ca)
- Cardiovascular Perfusion program is a 19 month full-time program. (michener.ca)
- Applicants to the Cardiovascular Perfusion program must possess specific qualifications in order to be eligible for admissions. (michener.ca)
- For the Cardiovascular Perfusion program, offers of admission will be allocated with equal consideration amongst candidates applying through option A and option B. (michener.ca)
- June 21, 2019 -- Myocardial perfusion cardiovascular MRI cannot top angiography and fractional flow reserve (FFR) measurements in determining which symptomatic patients with coronary artery disease risk factors need revascularization, according to a study published June 20 in the New England Journal of Medicine . (auntminnie.com)
- July 11, 2019 -- The CT perfusion scans of patients with pancreatic cancer revealed that those who responded well to chemoradiation therapy had higher blood flow measurements both before and after treatment than did patients who responded poorly in a new study, published online July 9 in Radiology . (auntminnie.com)
- Growth of the Global Medical Perfusion System Market has been forecasted for the time period 2019-2025, taking into consideration the previous sales patterns, the market growth drivers, current and future trends specific to particular regions and globally. (openpr.com)
Percutaneous hepatic p4
- Percutaneous hepatic perfusion (PHP) is a minimally invasive treatment that delivers high-dose chemotherapy directly to metastatic melanoma in the liver. (moffitt.org)
- At Moffit Cancer Center, percutaneous hepatic perfusion is offered to treat melanoma that has spread to the liver (as often occurs with ocular melanomas), and select other tumors metastatic to the liver. (moffitt.org)
- Percutaneous hepatic perfusion is just one of the advanced therapies offered by physicians at Moffitt as part of our commitment to providing the newest and most effective treatment options for metastatic melanoma. (moffitt.org)
- To learn more about percutaneous hepatic perfusion or any of the other advanced melanoma treatments offered at Moffitt Cancer Center, call 1-888-663-3488 or submit a new patient registration form online. (moffitt.org)
- Companies have historically used perfusion processes for labile proteins that would degrade if allowed to remain within a batch bioreactor for a few days. (sartorius.com)
- As a starting point for this multi-functional system, Resodyn Corporation will use its highly scalable (50-1,500ml) and successful (>1x108 cells/ml) hypoxia perfusion bioreactor. (sbir.gov)
- Perfusion bioreactor technology is thus expected to be a dominant single-use bioreactor technology over the forecast period of 2017-2025. (openpr.com)
- For instance, Remicade - blockbuster antibody preparation by Janssen Biotech, Inc. employs perfusion bioreactor technology for production. (openpr.com)
- Bioreactor characterization, Thermo Scientific™ TruBio™ DeltaV™ controller optimization, online process analytics, and scalability analysis of the S.U.B. when targeting perfusion applications in working volumes for pilot scale (50 L) to production scale (500 L). (pharmaceuticalonline.com)
- In vivo perfusion measurements in the extremities (arms, legs) during exercise. (tue.nl)
- Evidence of recent and not-so-recent myocardial infarcts will be visible, but most persons with coronary heart disease who have not had a previous infarction will have normal perfusion patterns when they are at rest. (britannica.com)
- Perfusion is altered minimally invasive by means of temporary occlusion of the supplying artery or exercise. (tue.nl)
- Lungs, however, provide a unique opportunity because they are greatly needed and appear so amenable to perfusion treatment, said John Dark, a professor of cardiothoracic surgery at Newcastle University, U.K., and president of the International Society for Heart & Lung Transplantation. (latimes.com)
- Keshavjee and his team used the Toronto XVIVO Lung Perfusion System, which was designed for this purpose. (latimes.com)
- The perfusion technique essentially repairs damage caused by swelling or inflammation in the lung, Dark said. (latimes.com)
- A lung ventilation/perfusion test, commonly referred to as a VQ test, is carried out to test the function of the lungs. (medic8.com)
- The lung ventilation/perfusion test is a safe procedure and does not usually cause any problems for patients, as the amount of radiation used is very small (the equivalent to how much a person is exposed to naturally over the course of one year) and side-effects are very rare. (medic8.com)
- Who would need a lung ventilation/perfusion test? (medic8.com)
- Lung perfusion has more than tripled since 2015, growing from 1.7 percent to 6.3 percent and potentially expanding the pool of organs available for transplant. (unos.org)
- The cooperative tubular shape of the individual loops perform to provide an inflatable cooperative outer surface of the balloon and a perfusion passage within the balloon. (freepatentsonline.com)
- a guidewire extending adjacent and exterior to the balloon and through the guidewire lumen, the guidewire having a perfusion lumen extending from a point proximal of the balloon to a point distal of the balloon such that blood may perfuse across the balloon when in an inflated state. (google.es)
- The plasma-extracellular space transfer constant (Ktrans) in min -1 is a quantitative perfusion parameter that is related to the capillar permeability and blood flow. (clinicaltrials.gov)
- A renal perfusion scintiscan is a nuclear medicine test. (medlineplus.gov)
- What Is Renal Perfusion? (reference.com)
- Renal perfusion is a term used to describe blood flow to the kidneys and is commonly assessed with a test called renal scintigraphy. (reference.com)
- This is important because there is concern about the effects of arterial spasm on renal perfusion during mobilization and dissection of the renal artery. (sages.org)
- The purpose of this study is to identify changes in renal parenchyma perfusion by Restrictive Index (RI) during Laparoscopic Donor Nephrectomy, before and after renal artery dissection. (sages.org)
- In this preliminary evaluation it appears that arterial dissection does reduce renal perfusion. (sages.org)
- The impact of gravity on pulmonary perfusion expresses itself as the hydrostatic pressure of the blood passing through the branches of the pulmonary artery in order to reach the apical and basal areas of the lungs, acting respectively against or synergistically with the pressure developed by the right ventricle. (wikipedia.org)
- Pulmonary ventilation/ perfusion test. (medic8.com)
- You may be advised to have a ventilation/perfusion test if you have symptoms of pulmonary embolism. (medic8.com)
- Pulmonary embolism: prospective comparison of spiral CT with ventilation-perfusion scintigraphy. (nih.gov)
- I am learning to perform liver perfusion in Hamsters. (protocol-online.org)
- 8. Perfuse the liver with ~50 mL of warm (37 XC) Liver Perfusion Medium [enriched in O2] through the abdominal aorta (legated below the kidneys and above the liver) at a rate of ~3.6 mL/minute with the perfusate exiting through the portal vein. (protocol-online.org)
- The liver should change color and the perfusion can be stopped when the liquid flowing through the portal vein is free of blood. (protocol-online.org)
- Focusing on the potential of CT perfusion to that end, Hamdy and colleagues examined 21 patients with pancreatic cancer who underwent CT perfusion before and after receiving chemoradiation therapy between June 2016 and May 2018. (auntminnie.com)
- showing] us a new direction for perfusion CT for patients with cancer," Sinitsyn wrote. (auntminnie.com)
- The perfusion CMR technique allows to detect or to exclude coronary artery disease in patients as demonstrated in many single center studies (J. Schwitter, Circ. (chuv.ch)
- The operations in the most recent 16 consecutive patients were performed under deep hypothermia with constant coronary and cerebral perfusion. (nih.gov)
- The operations in the prior 16 consecutive patients were performed using deep hypothermia, selective cerebral perfusion, and cardioplegic arrest during aortic reconstruction. (nih.gov)
- Note that the presence of diabetes confers a high risk for coronary events, yet Medicare does not recommend patients for perfusion studies on the basis of diabetes alone. (medpagetoday.com)
- Here, we summarize the current status of the research on the role of perfusion CT in patients suffering from TBI. (intechopen.com)
- Geiger-A, Magnes-J. The isolation of the cerebral circulation and the perfusion of the brain in the living cat. (bio.net)
- At the completion of this surgical preparation, the coronary circulation was completely separated from perfusion derived directly from within the LV chamber. (ahajournals.org)
- As venous pressure increased, the mean arterial pressure stayed more or less unchanged, generating reduced cerebral perfusion pressure and consequently an increased risk of ischaemia, which may impair cerebral perfusion, especially in cases of compromised arterial flow during extracorporeal circulation. (diva-portal.org)
- Extracorporeal perfusion of the isolated head of a dog. (bio.net)
- The guidewire includes an elongate shaft wherein a distal a portion of the shaft defines the perfusion lumen. (google.es)
- Alternatively, the perfusion lumen may be defined by a tubular member carried by the shaft. (google.es)
- As a further alternative, the shaft may include an expandable portion which defines the perfusion lumen. (google.es)
- 2. An intravascular system for the administration of ionizing radiation as in claim 1 , wherein the guidewire includes a shaft, a portion of which defines the perfusion lumen. (google.es)
- 3. An intravascular system for the administration of ionizing radiation as in claim 1 , wherein the guidewire includes a shaft and wherein the perfusion lumen is defined by a tubular member carried by the guidewire shaft. (google.es)
- 6. An intravascular system for the administration of ionizing radiation as in claim 1 , wherein the guidewire includes a shaft and wherein the guidewire shaft includes an expandable portion to define the perfusion lumen. (google.es)
- Therefore, under these conditions, the ideal ventilation perfusion ratio would be about 0.95. (wikipedia.org)
- If one were to consider humidified air (with less oxygen), then the ideal v/q ratio would be in the vicinity of 1.0 , thus leading to concept of ventilation-perfusion equality or ventilation-perfusion matching . (wikipedia.org)
- On the other side Ventilation-perfusion mismatch is the term used when the ventilation and the perfusion of a gas exchanging unit are not matched. (wikipedia.org)
- While both ventilation and perfusion increase going from the apex to the base, perfusion increases to a greater degree than ventilation, lowering the V/Q ratio at the base of the lungs. (wikipedia.org)
- An area with ventilation but no perfusion (and thus a V/Q undefined though approaching infinity) is termed dead space . (wikipedia.org)
- The VQ test involves two parts: the ventilation test and the perfusion test. (medic8.com)
- Once the ventilation test has been carried out the perfusion test will be conducted. (medic8.com)
- There are more than one hundred thousand perfusion procedures annually. (wikipedia.org)
-   Krogh was the first to describe the adaptation of blood perfusion in muscle and other organs according to demands through the opening and closing of arterioles and capillaries . (wikipedia.org)
- Stroke-induced alterations in cerebral blood flow (perfusion) may contribute to functional language impairments and recovery in chronic aphasia. (hindawi.com)
- Allweis-C, Abeles-M, Magnes-J. Perfusion of cat brain with simplified blood after filtration through glass wool. (bio.net)
- LDF is measured in a relative unit of BPU (Blood Perfusion Unit). (adinstruments.com)
- These morphological characteristics of SMM-associated blood vessels may affect SMM blood perfusion. (nature.com)
- the diffusion into neighbouring cells of substances being brought by the blood is known as blood perfusion. (nature.com)
- In this manuscript we will therefore use 'blood flow' and 'blood perfusion' almost interchangeably. (nature.com)
- It provides a detailed study of cerebral blood perfusion, which is intended to identify ischemic brain regions, especially within the first few hours after stroke onset. (unicare.com)
- The last five years have seen a paradigm shift to distal aortic perfusion (DAP) during aortic cross clamping with the concurrent use of motor evoked potential (MEP) monitoring to provide objective evidence for the need to revascularized intercostals vessels. (news-medical.net)
Claim 1 wherein1
- 2. The energy delivery system of claim 1 wherein the therapeutic device comprises a perfusion system. (google.es)
- The studies on diagnostic performance were followed by studies demonstrating the excellent prognostic power of perfusion-CMR to predict outcome (death and non-fatal myocardial infarction etc). (chuv.ch)
- Excellent prognostic power of perfusion CMR in the Cardiovascular European Registry (outcome: death and non-fatal myocardial infarction). (chuv.ch)
- Key concepts are discussed such as intraspinal pressure and spinal cord perfusion pressure (SCPP) at the injury site, respectively, analogous to intracranial pressure and cerebral perfusion pressure for traumatic brain injury. (wingsforlife.com)
- Regional perfusion therapy may be a treatment option for tumors resulting from the spread of melanoma that are confined to a single organ or region of the body. (upmc.com)
- Targeted Perfusion Therapy in Spinal Cord Trauma. (wingsforlife.com)
- Therefore, one potential role of cerebral perfusion CT is its use to distinguish between the infarcted core and the ischemic penumbra and to identify candidates for thrombolytic therapy. (unicare.com)
- These findings underscore the need to consider cerebral perfusion as a factor contributing to language deficits in chronic aphasia as well as recovery of language function. (hindawi.com)
- The proportion of livers being treated with this transformative technology (including normothermic, hypothermic and other perfusion), also showed similar steady growth, jumping from just .1 percent in 2016 to 1.4 percent by the end of 2018. (unos.org)
- During major surgery, especially cardiothoracic surgery , perfusion must be maintained and managed by the health professionals involved, rather than left to the body's homeostasis alone. (wikipedia.org)
- The 15th European Conference on Perfusion Education and Training (ECoPEaT) was held in Amsterdam, The Netherlands on October 3, 2015, the Saturday before the Congress of the European Association of Cardiothoracic Surgeons (EACTS). (medtronic.com)
- For real-time or pre-programmed liquid switching in perfusion, physiology, biophysics, electrochemistry, or general liquid-handling research applications. (bio-medicine.org)
- Arrows indicate a small perfusion defect on the backside of the heart (visible only on the stress images), showing ischemia in this region of the heart wall. (medscape.com)
- Another option is myocardial perfusion cardiovascular MRI, which offers high concordance with FFR for ischemia diagnosis and possible revascularization. (auntminnie.com)
- Excellent diagnostic performance of perfusion CMR to detect ischemia in comparison to PET. (chuv.ch)
- Despite these controversies, perfusion CT has been found to be useful for noninvasive diagnosis of cerebral ischemia and infarction and for evaluation of vasospasm after subarachnoid hemorrhage. (nih.gov)
- In planar technique, the computer provides a 2-dimensional myocardial perfusion image. (medscape.com)
- The technique is based on the central volume principle (CBF = CBV/MTT) and requires the use of commercially available software employing complex deconvolution algorithms to produce the perfusion maps. (nih.gov)
- Absolute, real-time continuous perfusion measured from 0 to 200 ml/100g-min. (bio-medicine.org)
- Calne challenged the necessity of using continuous perfusion methods by demonstrating that successful 12-hour preservation could be achieved using much simpler techniques. (wikipedia.org)
- Perfusion bioreactors require cell retention or filtration devices during the continuous feed and removal of exhausted culture media. (openpr.com)
- Several other factors influencing the global market for perfusion bioreactors are increasing budget of biopharmaceutical companies in all areas related to bioprocessing, investment in adoption of new technologies, continuous discovery of numerous cost and performance advantages of perfusion technology, technological advances such as 3Dperfusion technology etc. (openpr.com)