The internal resistance of the BLOOD to shear forces. The in vitro measure of whole blood viscosity is of limited clinical utility because it bears little relationship to the actual viscosity within the circulation, but an increase in the viscosity of circulating blood can contribute to morbidity in patients suffering from disorders such as SICKLE CELL ANEMIA and POLYCYTHEMIA.
A subacute paralytic myeloneuropathy occurring endemically in tropical areas such as the Caribbean, Colombia, India, and Africa, as well as in the southwestern region of Japan; associated with infection by HUMAN T-CELL LEUKEMIA VIRUS I. Clinical manifestations include a slowly progressive spastic weakness of the legs, increased reflexes, Babinski signs, incontinence, and loss of vibratory and position sensation. On pathologic examination inflammatory, demyelination, and necrotic lesions may be found in the spinal cord. (Adams et al., Principles of Neurology, 6th ed, p1239)
Mild or moderate loss of motor function accompanied by spasticity in the lower extremities. This condition is a manifestation of CENTRAL NERVOUS SYSTEM DISEASES that cause injury to the motor cortex or descending motor pathways.
A strain of PRIMATE T-LYMPHOTROPIC VIRUS 1 isolated from mature T4 cells in patients with T-lymphoproliferation malignancies. It causes adult T-cell leukemia (LEUKEMIA-LYMPHOMA, T-CELL, ACUTE, HTLV-I-ASSOCIATED), T-cell lymphoma (LYMPHOMA, T-CELL), and is involved in mycosis fungoides, SEZARY SYNDROME and tropical spastic paraparesis (PARAPARESIS, TROPICAL SPASTIC).
Impairment of the ability to coordinate the movements required for normal ambulation (WALKING) which may result from impairments of motor function or sensory feedback. This condition may be associated with BRAIN DISEASES (including CEREBELLAR DISEASES and BASAL GANGLIA DISEASES); SPINAL CORD DISEASES; or PERIPHERAL NERVOUS SYSTEM DISEASES.
A plant genus of the family EUPHORBIACEAE that is perennial with conspicuous, almost palmate leaves like those of RICINUS but more deeply parted into five to nine lobes. It is a source of a starch after removal of the cyanogenic glucosides. The common name of Arrowroot is also used with Maranta (MARANTACEAE). The common name of yuca is also used for YUCCA.
A bibliographic database that includes MEDLINE as its primary subset. It is produced by the National Center for Biotechnology Information (NCBI), part of the NATIONAL LIBRARY OF MEDICINE. PubMed, which is searchable through NLM's Web site, also includes access to additional citations to selected life sciences journals not in MEDLINE, and links to other resources such as the full-text of articles at participating publishers' Web sites, NCBI's molecular biology databases, and PubMed Central.
The resistance that a gaseous or liquid system offers to flow when it is subjected to shear stress. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
The volume of packed RED BLOOD CELLS in a blood specimen. The volume is measured by centrifugation in a tube with graduated markings, or with automated blood cell counters. It is an indicator of erythrocyte status in disease. For example, ANEMIA shows a low value; POLYCYTHEMIA, a high value.
Analog or digital communications device in which the user has a wireless connection from a telephone to a nearby transmitter. It is termed cellular because the service area is divided into multiple "cells." As the user moves from one cell area to another, the call is transferred to the local transmitter.
The formation of clumps of RED BLOOD CELLS under low or non-flow conditions, resulting from the attraction forces between the red blood cells. The cells adhere to each other in rouleaux aggregates. Slight mechanical force, such as occurs in the circulation, is enough to disperse these aggregates. Stronger or weaker than normal aggregation may result from a variety of effects in the ERYTHROCYTE MEMBRANE or in BLOOD PLASMA. The degree of aggregation is affected by ERYTHROCYTE DEFORMABILITY, erythrocyte membrane sialylation, masking of negative surface charge by plasma proteins, etc. BLOOD VISCOSITY and the ERYTHROCYTE SEDIMENTATION RATE are affected by the amount of erythrocyte aggregation and are parameters used to measure the aggregation.
The deformation and flow behavior of BLOOD and its elements i.e., PLASMA; ERYTHROCYTES; WHITE BLOOD CELLS; and BLOOD PLATELETS.
The study of the deformation and flow of matter, usually liquids or fluids, and of the plastic flow of solids. The concept covers consistency, dilatancy, liquefaction, resistance to flow, shearing, thixotrophy, and VISCOSITY.
Reduction of blood viscosity usually by the addition of cell free solutions. Used clinically (1) in states of impaired microcirculation, (2) for replacement of intraoperative blood loss without homologous blood transfusion, and (3) in cardiopulmonary bypass and hypothermia.
A lymphoproliferative disorder characterized by pleomorphic B-LYMPHOCYTES including PLASMA CELLS, with increased levels of monoclonal serum IMMUNOGLOBULIN M. There is lymphoplasmacytic cells infiltration into bone marrow and often other tissues, also known as lymphoplasmacytic lymphoma. Clinical features include ANEMIA; HEMORRHAGES; and hyperviscosity.
Laboratory and other services provided to patients at the bedside. These include diagnostic and laboratory testing using automated information entry.
The terms, expressions, designations, or symbols used in a particular science, discipline, or specialized subject area.
A system for verifying and maintaining a desired level of quality in a product or process by careful planning, use of proper equipment, continued inspection, and corrective action as required. (Random House Unabridged Dictionary, 2d ed)
Ability of ERYTHROCYTES to change shape as they pass through narrow spaces, such as the microvasculature.
Red blood cells. Mature erythrocytes are non-nucleated, biconcave disks containing HEMOGLOBIN whose function is to transport OXYGEN.
A process of separating particulate matter from a fluid, such as air or a liquid, by passing the fluid carrier through a medium that will not pass the particulates. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Agents that modify interfacial tension of water; usually substances that have one lipophilic and one hydrophilic group in the molecule; includes soaps, detergents, emulsifiers, dispersing and wetting agents, and several groups of antiseptics.
The process whereby PLATELETS adhere to something other than platelets, e.g., COLLAGEN; BASEMENT MEMBRANE; MICROFIBRILS; or other "foreign" surfaces.
Non-nucleated disk-shaped cells formed in the megakaryocyte and found in the blood of all mammals. They are mainly involved in blood coagulation.
Diversion of blood flow through a circuit located outside the body but continuous with the bodily circulation.
Individual members of North American ethnic groups with ancient historic ancestral origins in Asia.
Messages between computer users via COMPUTER COMMUNICATION NETWORKS. This feature duplicates most of the features of paper mail, such as forwarding, multiple copies, and attachments of images and other file types, but with a speed advantage. The term also refers to an individual message sent in this way.
Physical activity which is usually regular and done with the intention of improving or maintaining PHYSICAL FITNESS or HEALTH. Contrast with PHYSICAL EXERTION which is concerned largely with the physiologic and metabolic response to energy expenditure.
Controlled physical activity which is performed in order to allow assessment of physiological functions, particularly cardiovascular and pulmonary, but also aerobic capacity. Maximal (most intense) exercise is usually required but submaximal exercise is also used.
The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.
A regimen or plan of physical activities designed and prescribed for specific therapeutic goals. Its purpose is to restore normal musculoskeletal function or to reduce pain caused by diseases or injuries.
Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.
Elongated gray mass of the neostriatum located adjacent to the lateral ventricle of the brain.
The circulation of blood through the BLOOD VESSELS of the BRAIN.
The domestic cat, Felis catus, of the carnivore family FELIDAE, comprising over 30 different breeds. The domestic cat is descended primarily from the wild cat of Africa and extreme southwestern Asia. Though probably present in towns in Palestine as long ago as 7000 years, actual domestication occurred in Egypt about 4000 years ago. (From Walker's Mammals of the World, 6th ed, p801)
The arterial blood vessels supplying the CEREBRUM.

Extracorporeal rheopheresis in the treatment of acute ischemic stroke: A randomized pilot study. (1/580)

BACKGROUND AND PURPOSE: Extracorporeal rheopheresis is a safe method to optimize hemorheology. Our aim was to determine whether treatment with extracorporeal rheopheresis in patients with acute ischemic hemispheric stroke improves cerebral perfusion as assessed with serial 99mTc-ethyl-cysteinate-dimer single-photon emission CT (99mTc-ECD SPECT). We also investigated how clinical outcome is associated with treatment and imaging results. METHODS: Thirty-three patients (mean age, 64+/-10 years) with acute ischemic hemispheric stroke were included in a prospective, randomized, parallel group pilot study. First treatment with or without extracorporeal rheopheresis took place within 12 hours after the onset of symptoms and was repeated 3 times at intervals of 24 hours. Hemorheological parameters were measured before and after each session. Each patient underwent 99mTc-ECD SPECT immediately before treatment, 6 to 8 hours after treatment, and after 5 days. A semiquantitative SPECT graded scale was used to measure depth and extent of activity deficits and thus to quantify the perfusion deficit. RESULTS: Seventeen patients were actively treated with extracorporeal rheopheresis, and 16 patients did not receive extracorporeal rheopheresis. After 3 months, no differences were found in the functional or neurological outcome. Despite a rapid, sustained decrease of plasma viscosity and erythrocyte aggregation in the rheopheresis group, there was no significant difference in the SPECT graded scale after therapy between the 2 groups. Patients with early reperfusion (decrease in the SPECT graded scale >25% 6 to 8 hours after therapy compared with the baseline examination) experienced a better functional outcome (Modified Rankin Scale) after 3 months compared with patients without reperfusion (P=0.04). CONCLUSIONS: Since quantitative flow mapping and clinical follow-up did not reveal any differences between patients who were treated with extracorporeal rheopheresis and controls, it appears very unlikely that extracorporeal rheopheresis enhances reperfusion after acute cerebral ischemia.  (+info)

Circulatory changes induced by isovolumic increase in red cell mass in fetal lambs. (2/580)

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

Hemodilution, cerebral O2 delivery, and cerebral blood flow: a study using hyperbaric oxygenation. (3/580)

Hemodilution reduces blood viscosity and O2 content (CaO2) and increases cerebral blood flow (CBF). Viscosity and CaO2 may contribute to increasing CBF after hemodilution. However, because hematocrit is the major contributor to blood viscosity and CaO2, it has been difficult to assess their relative importance. By varying blood viscosity without changing CaO2, prior investigation in hemodiluted animals has suggested that both factors play roughly equal roles. To further investigate the relationship of hemodilution, blood viscosity, CaO2, and CBF, we took the opposite approach in hemodiluted animals, i.e., we varied CaO2 without changing blood viscosity. Hyperbaric O2 was used to restore CaO2 to normal after hemodilution. Pentobarbital sodium-anesthetized rats underwent isovolumic hemodilution with 6% hetastarch, and forebrain CBF was measured with [3H]nicotine. One group of animals did not undergo hemodilution and served as controls (Con). In the three experimental groups, hematocrit was reduced from 44% to 17-19%. Con and hemodiluted (HDil) groups were ventilated with 40% O2 at 101 kPa (1 atmosphere absolute), which resulted in CaO2 values of 19.7 +/- 1.3 and 8.1 +/- 0.7 (SD) ml O2/dl, respectively. A second group of hemodiluted animals (HBar) was ventilated with 100% O2 at 506 kPa (5 atmospheres absolute) in a hyperbaric chamber, which restored CaO2 to an estimated 18.5 +/- 0.5 ml O2/dl by increasing dissolved O2. A fourth group of hemodiluted animals (HCon) served as hyperbaric controls and were ventilated with 10% O2 at 506 kPa, resulting in CaO2 of 9.1 +/- 0.6 ml O2/dl. CBF was 79 +/- 19 ml. 100 g-1. min-1 in the Con group and significantly increased to 123 +/- 9 ml. 100 g-1. min-1 in the HDil group. When CaO2 was restored to baseline with dissolved O2 in the HBar group, CBF decreased to 104 +/- 20 ml. 100 g-1. min-1. When normoxia was maintained during hyperbaric exposure in the HCon group, CBF was 125 +/- 18 ml. 100 g-1. min-1, a value indistinguishable from that in normobaric HDil animals. Our data demonstrate that the reduction in CaO2 after hemodilution is responsible for 40-60% of the increase in CBF.  (+info)

Relationship between smoking and cardiovascular risk factors in the development of peripheral arterial disease and coronary artery disease: Edinburgh Artery Study. (4/580)

AIMS: The aim was to determine whether the effect of smoking on the development of peripheral or coronary artery disease might be mediated by other cardiovascular risk factors, including dietary antioxidant vitamin intake, serum low and high density lipoproteins, blood pressure, plasma fibrinogen, blood viscosity and markers of endothelial disturbance and fibrin turnover. METHODS AND RESULTS: 1592 men and women aged 55-74 years were selected at random from 11 general practices in Edinburgh, Scotland and followed-up for 5 years. The incidences of peripheral arterial disease and coronary artery disease were 5.1% and 11.1%, respectively. Both conditions were more common in moderate and heavy smokers than in never smokers: cigarette smoking was a stronger risk factor for peripheral arterial disease than for coronary artery disease. Smoking was associated with reduced dietary antioxidant vitamin intake, serum high density lipoprotein cholesterol and diastolic blood pressure and with increased alcohol intake, serum triglycerides, blood viscosity, plasma fibrinogen, and markers of endothelial disturbance (tissue plasminogen activator and von Willebrand factor antigens). Simultaneous adjustment for these risk factors reduced the relative risk of peripheral arterial disease only slightly, from 3.94 (95% CI 2.04, 7.62) to 2.72 (95% CI 1.13, 6.53) in heavy smokers and from 1.87 (95% CI 0.91, 3.85) to 1.70 (95% CI 0.72, 3.99) in moderate smokers. Similar adjustment also had little effect on the risk of coronary artery disease associated with smoking. CONCLUSION: The combined effect of smoking on the cardiovascular risk factors studied may explain part of its influence on peripheral and coronary arterial disease, but the majority of the effect appears to be due to other mechanisms.  (+info)

Decreased anion gap associated with monoclonal and pseudomonoclonal gammopathy. (5/580)

Nine patients with monoclonal and one with pseudomonoclonal gammopathy were found to have a decreased anion gap. Eight of the patients had multiple myeloma, one has plasma cell leukemia and one had chronic active hepatitis. In all of the the decreased anion gap was associated with an increased concentration of IgG greater than 5 g/dl.  (+info)

Repetitive hemodilution in chronic obstructive pulmonary disease and pulmonary hypertension: effects on pulmonary hemodynamics, gas exchange, and exercise capacity. (6/580)

BACKGROUND: In cor pulmonale associated with severe chronic obstructive pulmonary disease (COPD), disturbances of pulmonary microcirculation may contribute significantly to hypoxemia, pulmonary hypertension, and exercise intolerance. OBJECTIVE: It was tested whether reduction of blood viscosity induced by repetitive hemodilution might improve pulmonary hemodynamics and oxygen uptake. METHODS: Seven patients with stable COPD (forced expiratory volume in 1 s 33 +/- 3 % of predicted, means +/- SE) and pulmonary hypertension were phlebotomized 5-6 times over a period of 3 months with substitution of 6% hydroxyethyl starch (molecular weight 40, 000). This resulted in a stepwise reduction of the hematocrit from 53.3 +/- 2.6 to 45.8 +/- 3.1% and a reduction of whole blood viscosity from 9.8 +/- 0.6 to 8.8 +/- 0.7 mPa x s at a shear rate of 2.0 s-1. Before and after the treatment period, patients underwent cardiopulmonary exercise testing and right heart catheterization. RESULTS: Mean pulmonary artery pressure (PAm) decreased from 30 +/- 3 to 22 +/- 2 mm Hg and arterial oxygen partial pressure (PaO2) increased from 63.2 +/- 2.2 to 71.8 +/- 3.7 mm Hg at rest. During peak exercise, PAm decreased from 59 +/- 7 to 53 +/- 7 mm Hg and PaO2 increased from 54.0 +/- 5.7 to 63.2 +/- 2.4 mm Hg after hemodilution. Peak oxygen consumption rose from 573 +/- 84 to 750 +/- 59 ml x min-1, corresponding to an increase in cardiac index from 4.25 +/- 0.5 to 5.88 +/- 0.76 liters x min-1 x m-2. Pulmonary vascular resistance fell from 345 +/- 53 to 194 +/- 32 dyn x s x cm-5. The patients' peak exercise capacity increased from 9.2 +/- 2. 0 before to 13.5 +/- 3.2 kJ at the end of the study (p < 0.05 for all differences, paired t test). CONCLUSION: The findings suggest that a prolonged improvement of pulmonary microcirculation by reducing blood viscosity may improve pulmonary gas exchange, central hemodynamics, and exercise tolerance in patients with severe COPD and pulmonary hypertension.  (+info)

Hemorheology and walking of peripheral arterial occlusive diseases patients during treatment with Ginkgo biloba extract. (7/580)

AIM: To study the effects of Ginkgo biloba extract 761 (GbE) from the points of view of hemorheology for patients of peripheral arterial occlusive diseases (PAOD). METHODS: The treatment with GbE (240 mg.d-1, po) and the pain-free walking distance (PFWD) were carried out for 24 PAOD patients (12 nondiabetic, ND and 12 diabetic, D) over 48 wk. The parameters erythrocyte stiffness (ES) and relaxation time (RT), the blood plasma viscosity (eta), the plasma fibrinogen concentration (Cf) and the blood sedimentation rate (BSR), the PFWD, and maximal walking distance (MWD) were determined at 6 wk before treatment (-6), at the beginning of the treatment (0), and after 6, 11, 16, and 48 wk of treatment. RESULTS: At wk -6, ES and RT of both the ND- and D-group were not significantly different from a healthy control group. At wk 0, stiffness and RT were significantly higher than healthy control, and the mean PFWD was only 111 m. The eta value was significantly elevated and Cf and BSR were enhanced. Throughout 11 wk of treatment ES, RT, eta, and Cf decreased gradually and PFWD improved. Between 16 and 48 wk, ES, and RT were no longer significantly different from the controls, whereas eta and Cf decreased gradually but remained higher than normal, BSR decreased, and the PFWD improved by a factor of 3.8 times (D) and 3.3 times (ND). CONCLUSION: GbE gives therapeutic effects in PAOD patients.  (+info)

Altered flow properties of blood and increased plasma fibrinogen in cyclosporin-treated renal allograft recipients. (8/580)

BACKGROUND: Abnormalities in blood rheology may be factors contributing to cardiovascular complications and the progression of renal failure in kidney allograft recipients. The haemorheological variables haematocrit, fibrinogen, whole blood viscosity, plasma viscosity, erythrocyte aggregation tendency and fluidity were measured in 27 cyclosporin A (CyA)-treated patients who had received a renal graft at least 6 months previously. Their creatinine clearance was in the range of 12-92 ml/min/1.73 m2 (mean 55+/-19). The values were compared with those obtained from a control group comprising 20 healthy subjects matched according to age, sex and smoking habits. RESULTS: The haematocrit, plasma fibrinogen, whole blood viscosity, plasma viscosity, erythrocyte aggregation tendency, body mass index (BMI), mean arterial pressure (MAP) and serum triglycerides were increased in the transplanted patients, and the serum high density lipoprotein (HDL)-cholesterol and erythrocyte fluidity decreased. The haemorheological variables were used as dependent variables in a stepwise regression analysis with age, MAP, BMI, urinary albumin excretion rate, blood CyA concentration, creatinine clearance, and serum triglycerides, cholesterol and HDL-cholesterol as independent variables. Plasma fibrinogen was positively correlated with BMI and blood CyA. The whole blood viscosity was positively correlated with blood CyA and negatively with serum HDL-cholesterol. Only serum triglycerides remained correlated with erythrocyte aggregation tendency. CONCLUSIONS: All variables with a known impact on blood viscosity were altered in the present group of renal transplant recipients. Inappropriate regulation of erythrocyte formation, overweight, the use of CyA, high triglycerides and low HDL-cholesterol levels may be factors contributing to this. The importance of impaired flow properties of blood for the development of cardiovascular diseases and transplant glomerulosclerosis needs to be examined.  (+info)

Increased level of blood viscosity, which is one of the major factors that determine blood rheology, has been reported as a risk factor or predictor for cerebrovascular events. We investigated how blood viscosity is associated with acute stroke and chronic radiological manifestations of cerebral small vessel disease, and how blood viscosity changes after stroke. We prospectively enrolled consecutive patients with acute ischemic stroke. Whole blood viscosities at a low or high shear rate were measured using a scanning capillary tube viscometer, and were referred to as diastolic blood viscosity (DBV) and systolic blood viscosity (SBV), respectively. Correlations between blood viscosity and acute stroke etiology or chronic radiological manifestations of cerebral small vessel disease were investigated. The temporal profiles of blood viscosity at the onset of stroke and follow-up at 1 and 5 weeks were investigated. Of the 127 patients admitted with acute ischemic stroke, 63 patients were included in the
TY - JOUR. T1 - Fatal cerebral hemorrhage in a patient with CD19-positive Igm-producing aggressive plasma cell myeloma, hyperviscosity syndrome and cryoglobulinemia. AU - Alatoom, Adnan. AU - Elsabrouty, Rania. AU - Willis, Jason. AU - Boils, Christie. AU - Sarode, Ravindra. AU - Hashim, Ibrahim. AU - Wang, Huan You. PY - 2009. Y1 - 2009. N2 - IgM plasma cell myeloma (PCM) is a rare entity, and CD19 positivity is found in only 1-4% of PCM. Here we report a unique case of IgM PCM, in which the plasma cells are positive for CD19. Clinically, the patient presented with hyperviscosity syndrome, mimicking the clinical manifestation of Waldenstroms macroglobulinemia. In addition, the IgM para-protein from the patient behaved like cryoglobulins, which interfered with some of the laboratory measurements and resulted in erroneous platelet count, mean platelet volume, and serum IgM level. Despite chemotherapy, the PCM persisted and progressed to plasma cell leukemia, and the patient died of a left ...
China Medical Laser Machine for Reducing High Blood Viscosity, Find details about China Medical Laser, Medical Laser Machine from Medical Laser Machine for Reducing High Blood Viscosity - Hubei YJT Technology Co., Ltd.
Two patients had Sjögrens syndrome and chronic polysynovitis that had caused neither deformity nor bony erosions. Both patients had increased serum viscosity, and one patient had the hyperviscosity syndrome. Increased serum viscosity correlated with the presence of intermediate complexes that seem to be formed by interactions between IgG antigen and IgG rheumatoid factor. Neither the occurrence of the hyperviscosity syndrome in Sjögrens syndrome nor the association of hyperviscosity with circulating serum IgG-IgG rheumatoid factor complexes has been previously reported. ...
Hyperviscosity syndrome (HVS) refers to the clinical sequelae of increased blood viscosity. Increased serum viscosity usually results from increased circulating serum immunoglobulins and can be seen in such diseases as Waldenström macroglobulinemia and multiple myeloma.
Rheology - the study of the flow of matter and accompanying phenomena of real bodies deformation - in relation to blood - hemorheology. Blood viscosity - the main rheological parameter - has been studied in many research centers and among many different group of patients. The main disorders related to the hemorheological properties are: coronary insufficiency, vascular congestion, myocardial infarction, cerebral circulation disorder, Reynaud disease, ischemic limbs, diabetes, anemia, tumors. The following parameters are the main blood viscosity determinants: plasma viscosity, hematocrit, red cell deformability and erythrocytes aggregation. In hemorheological studies we used mathematical rheological models. The measurements of blood and plasma viscosity are performed by means of oscillating-rotary rheometers in order to determine the dependence of blood viscosity on the shear rate and the two components of the complex blood viscosity. Determination of blood cells aggregability and deformability ...
Methods:Whole blood viscosity at high and low shear rate (HBV,LBV),plasma viscosity (PV) and whole blood LPO were examined in 40 women with PIH and 30 normal late pregnant women. 方法随机选择妊高征患者40例(妊高征组)、正常晚期妊娠妇女30例(正常孕妇组),用硫代巴比妥酸比色法测定全血LPO水平,用粘度计测定高切、低切变率全血粘度及血浆粘度,分析血液粘度各指标与LPO水平的关系 ...
TY - JOUR. T1 - Hemorheological parameters in coronary artery disease. AU - Kesmarky, G.. AU - Toth, K.. AU - Habon, L.. AU - Vajda, G.. AU - Juricskay, I.. PY - 1998/7/1. Y1 - 1998/7/1. N2 - Hemorheological parameters are primary risk factors in ischemic heart disease (IHD). In the present study the relation of these parameters to the severity of coronary artery disease (CAD) was examined. The data of 109 patients (mean age: 55 ± 9 years) undergoing coronary angiography and 59 healthy controls (mean age: 35 ± 10 years) were analyzed. Hemorheological parameters (hematocrit, fibrinogen level, plasma viscosity (PV) and apparent whole blood Viscosity (WBV)) were determined and the circulatory index (CRI) was calculated. Patients were classified into three groups according to their coronary vessel state based on the coronary angiogram: Group 1 (n = 19, mean age: 53 ± 8 years) without significant CAD, Group 2 (n = 19, mean age: 51 ± 11 years) with single vessel disease, Group 3 (n = 71, mean age: ...
50% of patients had 1 α-gene deleted (−α3.7 deletion). In agreement with previous studies,1,9 they exhibited lower mean cell volume, higher hematocrit and hemoglobin, increased RBC deformability, decreased RBC aggregates strength (P,0.05 for all parameters) and similar blood viscosity compared to patients without α-thalassemia (data not shown). The magnitude of the hematological/hemorheological responses under HU treatment was similar in the two groups, except for hemoglobin (+16 vs. +8%, P,0.05), hematocrit (+23 vs. +11%, P,0.05), the hematocrit/blood viscosity ratio (+34 vs. +8%, P,0.05) and RBC deformability (at 30 Pa: +65 vs. +26%, P,0.05), which increased more in patients without α-thalassemia than in patients with it. The effect of HU on the decrease of the number of VOC/STA events was similar in the two subgroups.. In agreement with previous studies, HU significantly decreased the rates of hospitalization for VOC and ACS in SCA patients who frequently exhibited these ...
Synonyms for viscous resistance in Free Thesaurus. Antonyms for viscous resistance. 46 synonyms for resistance: opposition, hostility, aversion, refusal to accept, lack of enthusiasm for, reluctance to accept, fighting, fight, battle, struggle. What are synonyms for viscous resistance?
There is still considerable controversy regarding the influence of blood viscosity upon CBF. We have measured CBF with microspheres in 23 cats. Autoregulation was disturbed in the left caudate nucleus by microsurgical occlusion of the left middle cerebral artery. Induced hypertension or hypotension was used and i.v. mannitol (1 g/kg) administered. In all cats blood viscosity decreased an average of 16% at 15 minutes and, in 16 cats, increased 10% at 75 minutes post-mannitol. CBF in the right caudate was 79 +/- 6 ml/100g/min, in the left 38 +/- 6 (p less than 0.001). Only minor changes of CBF occurred in areas with presumed normal autoregulation, including the right caudate, in conjunction with pressure or viscosity changes. In the left caudate CBF decreased 21% with hypotension and 18% with higher viscosity, more than on the right (p less than 0.01 and p less than 0.2, respectively). CBF increased in the left caudate 56% with hypertension and 47% with lower viscosity, again much more than on the ...
Plasma viscosity is a major determinant of capillary blood flow. It has been suggested that alteration in plasma viscosity contributes to impaired blood flow and to increased cardiovascular risk. The aim of this study was to investigate the plasma viscosity levels and its possible role in the cardiovascular risk in patients with low grade nephrotic proteinuria. 20 patients with low-grade nephrotic proteinuria (mean age: 35+/-5 years) and 20 healthy controls (mean age: 33+/-4 years) were participated in the study. Plasma viscosity was measured by Harkness capillary viscometer. Biochemical analysis were measured by commercial enzymatic kits. Plasma viscosity, plasma levels of creatinine, fibrinogen and triglyceride were increased in patients with proteinuria than in the healthy controls ( ...
AIMS: To assess the relation of plasma viscosity to disease activity in patients with inflammatory bowel disease. METHODS: Crohns disease (n = 60) and ulcerative colitis (n = 71) were diagnosed on the basis of typical histological or radiological features. Active Crohns disease was defined as a Crohns disease activity index of 150 or over. Active ulcerative colitis was defined as a liquid stool passed three times a day or more with blood. Blood samples were assessed for haemoglobin concentration, total white cell count, platelets, plasma viscosity, erythrocyte sedimentation rate, serum albumin, and C-reactive protein. RESULTS: Plasma viscosity was higher in those with active Crohns disease compared with those with inactive Crohns disease or active ulcerative colitis. Plasma viscosity correlated significantly with erythrocyte sedimentation rate, C-reactive protein, and platelet count in patients with Crohns disease. In ulcerative colitis plasma viscosity correlated only with serum ...
TY - JOUR. T1 - Determination of the blood viscosity and yield stress with a pressure- scanning capillary hemorheometer using constitutive models. AU - Lee, Byung Kwon. AU - Xue, Shubin. AU - Nam, Jeonghun. AU - Lim, Hyunjung. AU - Shin, Sehyun. PY - 2011/3/1. Y1 - 2011/3/1. N2 - We investigated the applicability of two non-Newtonian constitutive models (Casson and Herschel-Bulkley models) in the determination of the blood viscosity and yield stress using a pressure-scanning microfluidic hemorheometer. The present results were compared with the measurements through a precision rheometer (ARES2). For a Newtonian fluid (standard oil), the two constitutive models showed excellent agreement with a reference value and the measurement of ARES2. For human blood as a non-Newtonian fluid, both the Casson and Herschel-Bulkley models exhibited similar viscosity results over a range of shear rates and showed excellent agreement with the ARES2 results. The Herschel-Bulkley model yielded a slightly higher ...
Authors: Chatpun, Surapong , Cabrales, Pedro Article Type: Research Article Abstract: The purpose of this study was to investigate how plasma viscosity affects cardiac and vascular function during moderate hemodilution. Twelve anesthetized hamsters were hemodiluted by 40% of blood volume with two different viscosity plasma expanders. Experimental groups were based on the plasma expander viscosity, namely: high viscosity plasma expander (HVPE, 6.3 mPa · s) and low viscosity plasma expander (LVPE, 2.2 mPa · s). Left ventricular (LV) function was intracardiacally measured with a high temporal resolution miniaturized conductance catheter and concurrent pressure-volume results were used to calculate different LV indices. Independently of the plasma expander, hemodilution decreased hematocrit to 28% in both groups. LVPE …hemodilution reduced whole blood viscosity by 40% without changing plasma viscosity, while HVPE hemodilution reduced whole blood viscosity by 23% and almost doubled plasma ...
Abstract. Rheologic properties of blood were studied in 8 patients with dilated cardiomyopathy (DCM) and in 10 healthy subjects. Whole-blood viscosity was measured at four different shear rates, by means of a computer-controlled rotational viscometer. The patients had significantly higher blood viscosity at all shear rates, both at their natural hematocrits and after an in vitro adjustment of sample hematocrits to 45%. Erythrocyte filterability (5 μm pore size) was significantly lower, fibrinogen concentration significantly higher, and HDLcholesterol concentration significantly lower in the patient group. No significant differences were found regarding hematocrit, mean corpuscular volume, haemoglobin concentration, leukocyte count and filterability (8 μm pore size), plasma viscosity, and total cholesterol concentration.. The measured hemorheologic abnormalities may contribute to the previously reported reduction of coronary blood flow reserve in DCM patients and to myocardial microcirculatory ...
We tested the effects of submaximal exercise on blood viscosity (ηb), nitric oxide production (NO) and hemodynamics. Relationships between the exercise-induced changes that occurred in these parameters were investigated. Nine subjects performed exercise for 15 min at 105% of the first ventilatory threshold. Mean arterial pressure (MAP) and cardiac output (Qc) were measured, allowing the determination of systemic vascular resistance (SVR). Blood was sampled at rest and at the end of exercise. The ηb was determined at high shear rate and was used to calculate systemic vascular hindrance (VH). NO production was estimated by measuring plasma concentrations of NO stable end products (NOx). Qc, MAP, ηb and NOx, increased with exercise, whereas SVR and VH decreased. The changes between rest and exercise were calculated and tested for correlations. We observed: 1) a positive correlation between the increase in ηb and the increase in NOx; 2) a negative correlation between the increase in NOx and the decrease
Authors: Vayá, Amparo , Murado, Julián , Santaolaria, Marisa , Simó, María , Micó, Luisa , Calvo, Javier , Todolí, José , Ricart, Jose M. Article Type: Research Article Abstract: Atherothrombotic events are significant factors of mortality and morbidity in patients with systemic lupus erythematosus (SLE). The extent that rheological factors may be involved in these events in these patients has not been established. We measured the following rheological parameters in 86 patients with SLE, of whom 16 had suffered venous and/or arterial thrombotic events, and in 86 healthy controls: fibrinogen (Fbg), plasma viscosity (PV), blood viscosity at 230 s−1 both at native haematocrit (BVn 230 s−1 ) and corrected to 45% (BVc 230 s−1 ), erythrocyte aggregation at stasis (AE0 ) and at 3 s−1 (AE1 ), …aggregation time (Ta), aggregation index at 10 s (AI10 ), disaggregation threshold (γD), and erythrocyte deformability (ED). In addition glucose, total cholesterol (T-Chol), triglycerides (TG), ...
PubMed journal article Blood viscosity and erythrocyte filterability: their evaluation in diabetes mellitu were found in PRIME PubMed. Download Prime PubMed App to iPhone or iPad.
A patient with Sjögrens syndrome who developed hyperviscosity is described. A polyclonal increase in all immunoglobulins was present, and ultracentrifuge studies showed the presence of intermediate complexes. Very high titers of rheumatoid factors were present. The detailed course of treatment for a 1-year period is presented and correlated with clinical and laboratory variables, such as serum viscosity, protein electrophoresis, levels of gamma globulin, rheumatoid factors, and ultracentrifuge patterns. The remarkable recovery of this patient after a 3-year period is documented. ...
This article discusses the fundamentals for measuring the viscosity of whole blood, serum, and plasma and its application to the diagnosis of hyperviscosity syndrome. We describe some of the terminology in the field, including relevant definitions, t
PubMed journal article Increased blood viscosity in diabetic proliferative retinopath were found in PRIME PubMed. Download Prime PubMed App to iPhone or iPad.
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Multiple Myeloma + Altered Mental Status=Hyperviscosity Syndrome. Although the differential diagnosis of altered mental status is quite extensive, a patient with multiple myeloma and altered mental status should prompt consideration of one important, albeit not too common, condition.....hyperviscosity syndrome.. Some important pearls:. ...
Hyperviscosity Syndrome Presenting as Exercise Induced Pulmonary Hypertension in a Heart Transplant Patient We report an unusual case of exertional dyspnea and exe..
Warnings and Precautions. Severe hypersensitivity reactions may occur with IGIV products, including ASCENIV. In case of hypersensitivity, discontinue ASCENIV infusion immediately and institute appropriate treatment. Patients with known antibodies to IgA may have a greater risk of developing potentially severe hypersensitivity and anaphylactic reactions.. Thrombosis may occur following treatment with immunoglobulin products and in the absence of known risk factors. Consider baseline assessment of blood viscosity in patients at risk for hyperviscosity and ensure adequate hydration before administration. For patients at risk of thrombosis, administer ASCENIV at the minimum dose and infusion rate practicable. Monitor for signs and symptoms of thrombosis and assess blood viscosity in patients at risk for hyperviscosity.. Acute renal dysfunction/failure, osmotic nephrosis, and death may occur upon use of human IGIV products. Ensure that patients are not volume depleted before administering ASCENIV. ...
Plasma viscosity estimation is a reflection of changes in plasma proteins within the blood. The values from normal subjects are within a narrowly defined range and change when protein fractions are altered. The major influence on plasma viscosity is exerted by fibrinogen and immunoglobulins. The Viscometer determines viscosity by measuring the resistance of the plasma flow through a capillary under a constant vacuum ...
Evaluation of plasma viscosity has been underutilized in the clinical practice. Plasma viscosity is determined by water-content and macromolecular components. Plasma is a highly concentrated protein solution, therefore weak protein-protein interactions can play a role that is not characterized by el …
BACKGROUND: Hypertension in pregnancy is one of the causes of maternal morbidity and mortality is high in addition to cases of bleeding and infection. In Indonesia hypertension in pregnancy is the cause of 30-40% of perinatal deaths. Hemokonsentrasi state is related to blood viscosity and hematocrit is an important determinant of the blood viscosity. Blood viscosity and peripheral vascular resistance affect the blood flow resistance, which has increased in primary hypertension. Careful observation of the several indicators prediction of preeclampsia, such as hematocrit levels can prevent from unwanted circumstances. METHODS: This research is to design interventions penelitiaan pre test - post to determine the relationship between hematocrit levels in preeclampsia before and after childbirth. All data collected old and new patients were evaluated. Pre and post test data is performed using the t test (t-test) and the test data to find the relationship of hematocrit levels with the degree of ...
This paper describes a procedure, based on Tikhonov regularization, for obtaining the shear rate function or equivalently the viscosity function of blood from Couette viscometry data. For data sets that include points where the sample in the annulus is partially sheared the yield stress of blood will also be obtained. For data sets that do not contain partially sheared points, provided the shear stress is sufficiently low, a different method of estimating the yield stress is proposed. Both the shear rate function and yield stress obtained in this investigation are independent of any rheological model of blood. This procedure is applied to a large set of Couette viscometer data taken from the literature. Results in the form of shear rate and viscosity functions and yield stress are presented for a wide range of hematocrits and are compared against those reported by the originators of the data and against independently measured shear properties of blood.. ...
Table38. Prognostic significance of a response to experimental acute progressive asphyxia typically included an immediate, transient, increase in blood viscosity at term. While the targeted chro- mosome aneuploidies and another 33% with extracardiac and chromosomal regions previously known as the av nodal conduction blocks are seen in fetuses with structural heart disease, and the papil- lary muscles; the valvular leaflets are wide variations in the arms, neck, or jaw are other features are helpful, to a trigger such as hypocalcemia; and priapism. Parents are encouraged to increase the left-to-right shunt across the patent ivc are juxtaposed on the right. 8) mechanisma thrombin inhibitor : Argatroban iv (hepatically cleared; not affected by the earlier the mitral or tricuspid valve and allowed to dry. Temper tantrums that occur are intracranial bleeding (subdural and subarachnoid hematomas) and, in select cases, postnatal steroids. Thus, if a fetal four-chamber view demonstrating the left and ...
Deteriorated blood rheology has been demonstrated in obstetric diseases with decreased placental perfusion. Many of the patients investigated in these studies suffered from conditions associated with hemorheological abnormalities, such as diabetes or
Cardiovascular risk factors in men, such as cigarette smoking, hypercholesterolemia, and hypertension, also increase risk in women, but the relative susceptibility to risk factors between the sexes is not established. Our aim was to investigate a wide range of possible etiologic factors in a single population study and identify those that were more strongly related to peripheral atherosclerosis in men or women. We studied personal factors (age and social class), lifestyle factors (smoking, exercise, alcohol intake, and dietary nutrients), and intermediary factors (obesity, diabetes, serum lipids, coagulation, and rheological factors). In the Edinburgh Artery Study in 1988 we measured cardiovascular risk factors in a random population sample of 1592 men and women aged 55 to 74 years. The ankle-brachial pressure index (ABPI), which is inversely related to the degree of peripheral atherosclerosis, was assessed in each subject. Lifetime cigarette smoking was correlated with a lower ABPI equally in men and
Get an answer for Blood viscosity and blood density depends on what? and find homework help for other Science questions at eNotes
The study was carried out to evaluate deformable and aggregative erythrocyte properties in humans under normal and pathological states and in rats exposed to various stressors. A strong correlation between the erythrocyte rheological determinants, i.e. deformability index and aggregation rate, was found under pathological and stress-induced states. The physiological significance of this phenomenon is to maintain the native structure of blood flow.
I understand the other factors affecting BP are blood volume, blood viscosity, resistance, and elasticity of fibres, and those affecting flow are size of blood vessel lumen, blood viscosity, and total blood vessel length ...
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Tropical myeloneuropathies were described initially in tropical countries and are classified into 2 clinical syndromes that can have overlapping features-tropical ataxic neuropathy (TAN) and tropical spastic paraparesis (TSP). TAN and TSP are 2 separate diseases that are grouped together because they both occur predominantly in tropical count...
Semantic Scholar extracted view of Erythrocyte velocity and fluorescein transit time in the cerebral microcirculation of macroglobulinemic mice: differential effect of a hyperviscosity syndrome on the passage of erythrocytes and plasma. by William I . Rosenblum
Global Blood Viscometer Market By Product Type (Rotational Viscometer, Capillary Viscometer) And By End-Users/Application (Hospital, Clinic) Global Market Share, Forecast Data, In-Depth Analysis, And Detailed Overview, and Forecast, 2013 - 2026
Question - What are the causes for thick blood? . Ask a Doctor about diagnosis, treatment and medication for Hyperviscosity syndrome, Ask a Hematologist
The Edinburgh Artery Study recruited 1,592 people (809 men and 783 women) ages 55-74 years in 1988 from a general northern European white population sample. Full details of recruitment, data collection at baseline in 1988-1989, methods of follow-up, and definitions of outcomes have been previously described (19,20). The study population was selected to provide a population-based sample by random identification of eligible individuals in 5-year age bands from 11 general practices across the city of Edinburgh that provide primary care for populations of varying socioeconomic status. The response rate was 65%. Respondents were found to be representative of the wider population, as comparisons with a random sample of 20% of nonrespondents did not detect substantial bias (19). Baseline data were collected during participants attendance at a research clinic using a combination of questionnaire and examination data. Complete mortality follow-up was achieved by flagging for deaths at the National ...
Looking for capillary viscometer? Find out information about capillary viscometer. A long, narrow tube that is used to measure the laminar flow of fluids Explanation of capillary viscometer
5) cerebroprotective treatment.. The main disadvantage of all these treatments is the diffuse nature of their actions and a number of side effects.. So, vasoactive funds act diffuse to the blood vessels of the entire body is neither. Such action often is the cause of the syndrome victimize.. Drugs, improves blood rheology, have side effects. So, aspirin has ulcerogenic action, reopolyglykin, contributing to fluid retention in the body, is considered to be contraindicated in brain swelling, etc. however, this group of medicines without causing syndrome victimize that are essential for the optimization of cerebral circulation in the transition of sharp focus.. The feasibility of dehydration therapy is obvious, However, to date, the question of its efficiency in the use of modern diuretics discussed. Side-effects in their application include hypovolemia, often accompanied by unwanted decrease of systemic blood pressure and increased blood viscosity. Use as a tissue anti money glucorticoid ...
This video demostration explains how to use the BV1 Single Sample Viscometer and explains the key features that make it perfect for remote sample analysis. The capilliary viscometer can analyze plasma samples stored in EDTA without removing the cap, even if the sample has been previously used for other analyses. The viscometer utilizes only 50-80 µl of plasma per analyses, allowing repeat testing for pediatric and adult samples.
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If you have a question about this talk, please contact Ms Helen Gardner.. When red blood cells (RBCs) move through narrow capillaries in the microcirculation, they deform as they flow. In pathophysiological processes such as sickle cell disease and malaria, RBC motion and flow are severely restricted. To understand this threshold of occlusion, we used a combination of experiments and theory to study the motion of a single swollen RBC through a narrow glass capillary of varying inner diameter. By tracking the movement of the squeezed cell as it is driven by a controlled pressure drop, we measured the RBC velocity as a function of the pressure gradient as well as the local capillary diameter, and found that the effective blood viscosity in this regime increases with both decreasing RBC velocity and tube radius by following a power-law that depends upon the length of the confined cell. Our observations are consistent with a simple elasto-hydrodynamic model and highlight the role of lateral ...
Diagnosis Code R70 information, including descriptions, synonyms, code edits, diagnostic related groups, ICD-9 conversion and references to the diseases index.
Hemodynamic shear forces are intimately linked with cardiac development, during which trabeculae form a network of branching outgrowths from the myocardium. Mutations that alter Notch signaling also result in trabeculation defects. Here, we assessed whether shear stress modulates trabeculation to influence contractile function. Specifically, we acquired 4D (3D + time) images with light sheets by selective plane illumination microscopy (SPIM) for rapid scanning and deep axial penetration during zebrafish morphogenesis. Reduction of blood viscosity via ...
Blood resistance varies depending on blood viscosity and its plugged flow (or sheath flow since they are complementary across ... Blood[edit]. Main article: Blood. Blood is a complex liquid. Blood is composed of plasma and formed elements. The plasma ... This in turn affects the mechanics of the whole blood.[4] Red blood cells[edit]. The red blood cell is highly flexible and ... Relation between blood flow velocity and total cross-section area in human Type of blood vessels Total cross-section area Blood ...
He received his doctorate (MD) in 1920 with his thesis The viscosity of the blood and a DSc in 1924 with his thesis Some ... Lyon, D. Murray (1920). The viscosity of the blood. hdl:1842/32569. Lyon, D. Murray (1924). Some observations on the action of ...
... is an important determinant of blood viscosity, hence blood flow resistance in the vascular system. ... It affects blood flow in large blood vessels, due to the increased frictional resistance between fluid laminae under laminar ... It also affects the microcirculatory blood flow significantly, where erythrocytes are forced to pass through blood vessels with ... Erythrocyte deformability refers to the ability of erythrocytes (red blood cells, RBC) to change shape under a given level of ...
Another important discovery that determines the viscosity of blood is the ability of red blood cells to aggregate to form ... Chien and his colleagues discovered that this was a crucial factor in modulating viscosity and regulating blood flow and ... Chien, Shu; Usami, Shunichi; Dellenback, Robert J.; Gregersen, Magnus I. (August 18, 1967). "Blood Viscosity: Influence of ... In addition, this deformation helps lower the viscosity of blood and facilitate flow. ...
An increased number of red blood cells (polycythemia) causes reduced ESR as blood viscosity increases. Hemoglobinopathy such as ... ESR is also reduced by high blood viscosity, which slows the rate of fall. The rate of erythrocyte sedimentation is affected by ... The erythrocyte sedimentation rate (ESR or sed rate) is the rate at which red blood cells in anticoagulated whole blood descend ... Erythrocyte sedimentation rate (ESR) is the measure of ability of erythrocytes (red blood cell) to fall through the blood ...
... the latter may modify platelet aggregation and blood viscosity. Stroke, particularly intracerebral hemorrhage, is the most ...
Because of that, blood behaves as a non-Newtonian fluid. As such, the viscosity of blood varies with shear rate. Blood becomes ... Blood viscosity also increases with increases in red cell aggregability. Blood viscosity is a measure of the resistance of ... Blood viscosity is determined by plasma viscosity, hematocrit (volume fraction of red blood cell, which constitute 99.9% of the ... The primary determinants of blood viscosity are hematocrit, red blood cell deformability, red blood cell aggregation, and ...
Blood substitutes are the subject of research because the demand for blood transfusions grows faster than donations. In some ... Application to oxygen solubility, partition coefficient, viscosity, vapor pressure, and density". ASAIO Journal. 42 (6): 968- ... After injection into the blood, FDG is taken up by "FDG-avid" tissues with a high need for glucose, such as the brain and most ... Both PFOS and PFOA have been detected in breast milk and the blood of newborns. A 2013 review showed widely varying amounts of ...
Heart J. 1982 May;103(5):870-8. The effect of propranolol on blood viscosity changes induced by experimental coronary occlusion ... Her thesis was on Myocardial Ischemia and the use of non-typing artificial blood in hemodilution.[citation needed] Beresford- ... 1984 Oct;62(10):1333-7. Myocardial blood flow and O2-supply following dextran-haemodilution and methaemoglobinaemia in the dog ...
... is the main determinant of blood viscosity at low shear rate. Rouleaux formation also determines ... blood film syllectometry intravital microscopy high-frequency ultrasound Optical coherence tomography Chien S, Sung LA (1987 ... Erythrocyte aggregation is the reversible clumping of red blood cells (RBCs) under low shear forces or at stasis. Erythrocytes ... Erythrocyte aggregation is a physiological phenomenon that takes places in normal blood under low-flow conditions or at stasis ...
Recent works have shown how such nanomotors can be used to measure viscosity of non-newtonian fluids at a resolution of a few ... Such nanomotors have been demonstrated to move in blood. Recently, researchers have managed to controllably move such ... This technology promises creation of viscosity map inside cells and the extracellular milieu. ... "Conformal cytocompatible ferrite coatings facilitate the realization of a nanovoyager in human blood". Nano Letters. 14 (4): ...
Reubi FC (September 1953). "Glomerular filtration rate, renal blood flow and blood viscosity during and after diabetic coma". ... Transporters found in the kidney eliminate organic anions and cations from the blood by moving substances, in this case, drug ... para-aminohippurate was given along with penicillin in order to prolong the time penicillin circulated in the blood. Because ... metabolites, from blood into urine. pKa = 3.83 PAH clearance Ortho-iodohippurate Costanzo L (2007). Physiology (4th ed.). ...
Renal blood flow Reubi FC (September 1953). "Glomerular filtration rate, renal blood flow and blood viscosity during and after ... The concentration of PAH is measured in one arterial blood sample (PPAH) and one urine sample(UPAH). The urine flow (V) is also ... and therefore the rate at which the kidneys can clear PAH from the blood reflects total renal plasma flow. ... PAH is completely removed from blood that passes through the kidneys (PAH undergoes both glomerular filtration and tubular ...
One study, published in a fringe journal, attempted to show a reduction in blood viscosity and blood pressure, a key factor in ... Chevalier, G; Sinatra, ST; Oschman, JL; Delany, RM (2014-01-24). "Earthing (Grounding) the Human Body Reduces Blood Viscosity-a ... Lower Your Blood Pressure in Eight Weeks (Ballantine, 2003) Heart Sense for Women (Plume, 2001) Tocotrienols and Vitamin E ( ... East/West Medicine Expo West 2008 on YouTube New Living Magazine write-up on Lower Your Blood Pressure in Eight Weeks. ...
This has the net effect that the effective viscosity is less than that for whole blood. Because the cell-free layer is very ... Because the cell-free layer is red cell-poor, its effective viscosity is lower than that of whole blood. This layer therefore ... The Fåhræus-Lindqvist effect /fɑːˈreɪ.əs ˈlɪndkvɪst/ describes how the viscosity of a fluid, in this case blood, changes with ... ISBN 0-07-147217-7. Fahraeus R, Lindqvist T (1931) The viscosity of the blood in narrow capillary tubes. The American Journal ...
Changes in temperature affect the viscosity and surface tension of the blood, altering the minimum blood flow rate. At high ... In vasodilation the blood vessels dilate to allow more blood flow. The smooth muscle cells are relaxed to increase the diameter ... Changes in temperature affect the viscosity of blood and the surface tension. Surface tension decreases with increasing ... The blood brain barrier restricts diffusion to small hydrophobic molecules, making drug diffusion difficult to achieve. Blood ...
... when the dried blood usually liquefies. If the blood fails to liquefy, then legend has it that disaster will befall Naples. A ... In such a substance viscosity increases if left unstirred and decreases if stirred or moved. Researchers have proposed ... The blood did not liquify when Pope Benedict XVI visited in 2007. Saint Januarius Pope Innocent IV Charles I of Naples Saint ... On March 21, 2015, the blood in the vial appeared to liquify during a visit by Pope Francis. This was taken as a sign of the ...
This lowers the viscosity of the synovial fluid (which increases friction) and causes white blood cells and enzymes to enter ... PSGAG reaches peak blood concentration in 20-40 minutes when injected intramuscularly; 30-40% of it binds to blood proteins. It ... The inhibition of blood coagulation reduces resultant fibrinolysis, which would cause cell death and increase local ... PSGAG also stimulates the synthesis of glycosaminoglycans, hyaluronic acid, and collagen, which increase synovial viscosity. It ...
Soluble glycoproteins often show a high viscosity, for example, in egg white and blood plasma. Miraculin, is a glycoprotein ... A famous example of this latter effect is the ABO blood group system.[citation needed] Glycosylation is also known to occur on ... Glycoproteins are important for white blood cell recognition.[citation needed] Examples of glycoproteins in the immune system ... H antigen of the ABO blood compatibility antigens. Other examples of glycoproteins include: gonadotropins (luteinizing hormone ...
A rheoscope is an instrument for detecting or measuring the viscosity of a fluid. In the study of blood flow, a rheoscope is ... used to observe and measure the deformation of blood cells subject to different levels of fluid shear stress. Meurant, Gerard ( ...
Li, Yike (15 June 2017). "Interventions in the management of blood viscosity for idiopathic sudden sensorineural hearing loss: ... It is possible that the high blood glucose levels associated with diabetes cause damage to the small blood vessels in the inner ... an anti-vertigo drug hyperbaric oxygen rheologic agents that reduce blood viscosity (such as hydroxyethyl starch, dextran and ... doi:10.1182/blood-2016-09-687889. PMC 5391620. PMID 28179280. Hirabayashi S, Wlodarski MW, Kozyra E, Niemeyer CM (August 2017 ...
... radius of the blood vessel δ = distance in the plasma release-cell layer Blood resistance varies depending on blood viscosity ... Diastolic blood pressure BPsys = Systolic blood pressure Differences in mean blood pressure are responsible for blood flow from ... It had been thought that aspirin and related "blood thinner" drugs decreased the viscosity of blood, but instead studies found ... Certain medical conditions can change the viscosity of the blood. For instance, anemia (low red blood cell concentration), ...
Red blood cells, or erythrocytes, have a unique lipid composition. The bilayer of red blood cells is composed of cholesterol ... This results in increasing viscosity of the lipid bilayer closer to the hydrophilic heads. Below a transition temperature, a ... Erythrocyte membrane plays a crucial role in blood clotting. In the bilayer of red blood cells is phosphatidylserine. This is ... However, it is flipped to the outer membrane to be used during blood clotting. Phospholipid bilayers contain different proteins ...
... the second viscosity ζ can be assumed to be constant. The effect of the volume viscosity ζ is that the mechanical pressure is ... the study of blood flow, the design of power stations, the analysis of pollution, and many other things. Coupled with Maxwell's ... Both second viscosity ζ and dynamic viscosity μ need not be constant - in general, they depend on density, on each other (the ... the bulk viscosity λ and the dynamic viscosity μ, as it is usual in linear elasticity: Linear stress constitutive equation ( ...
... is a group of symptoms triggered by an increase in the viscosity of the blood. Symptoms of high blood ... May occur with a white blood cell count greater than 100,000/mm3 (100×109/L). Although elevated whole blood viscosity is a ... Blood transfusions should be used with caution as they can increase serum viscosity. Hydration is a temporizing measure to ... serum viscosity and plasma viscosity are more frequently measured. Normal plasma viscosity is between 1.4 and 1.8 centipoise ...
Physicians also examined blood via phlebotomy, they would observe the viscosity and color of the blood as it was draining from ... The color and viscosity denoted whether the patient had an acute, major, or chronic disease; which also assisted the physician ... Part 2: sputum, vomit, blood, sweat, autopsies". Clinical Chemistry and Laboratory Medicine. 43 (1): 90-96. doi:10.1515/CCLM. ... Part 2: sputum, vomit, blood, sweat, autopsies". Clinical Chemistry and Laboratory Medicine. 43 (1): 90-96. doi:10.1515/CCLM. ...
Liepsch, D.; Sindeev, S.; Frolov, S. (August 2018). "An impact of non-Newtonian blood viscosity on hemodynamics in a patient- ... including factors affecting a blood vessel wall and the blood through the vessel, contribute. The pressure of blood within the ... The blood vessel can be under large strain, or the amount of stretch the blood vessel can undergo, for a range of low applied ... Blood clots can dislodge from the aneurysm, which can then lead to an embolism when the clot gets stuck and disrupts blood flow ...
The level of echinocytosis appeared to be related to the increase in blood viscosity that occurs during hemodialysis. The ... Echinocytosis is a reversible condition of red blood cells that is often merely an artifact produced by EDTA, which is used as ... Instead, it is speculated that cell surface receptors on the red blood cells bind with HDL cholesterol, which induces the shape ... Alternating electric current produces modifications in the membranes of red blood cells, attributed to a higher permeability to ...
... which causes a significant increase of viscosity in blood. This causes diminished blood flow in tissues, so oxygen distribution ... Arteriole spasms include the major part of the blood flow through the pulmonary vessels, producing a short circuit in the blood ... all the blood pressure in veins will increase. This means less blood reaches the heart, affecting its ability to function, with ... with an increase of the hemoglobin concentration in blood from 15 g/dl up to 20-21 g/dl. Also the blood volume increases 20% ...
Pentoxifylline has been shown to decrease blood viscosity, reduce platelet aggregation, and increase red blood cell ... Platelets within the blood release growth factors after they are activated. These growth factors lead to new blood vessel ... To produce PRP, the patient's blood is centrifuged to separate the plasma from the red blood cells. The plasma is then further ... It is used to improve blood flow and subsequently healing, and to increase extensibility of tissues. Improved blood flow can ...
Separation of urine components and blood components in forensic and research laboratories ... viscosity of the medium and rotor speed.[1] This process is used to separate two miscible substances, but also to analyze the ... and the viscosity. The most common application is the separation of solid from highly concentrated suspensions, which is used ...
Sodium is an essential nutrient that regulates blood volume, blood pressure, osmotic equilibrium and pH; the minimum ... viscosity, and cross-section towards neutron absorption.[10]:74 ... which was known partly for its high abundance in animal blood. ... "Global burden of blood-pressure-related disease, 2001" (PDF). Lancet. 371 (9623): 1513-1518. doi:10.1016/S0140-6736(08)60655-8 ...
... is often used as part of the mixture that goes into creating fake blood for films and television. Blood mixtures ... a maltose solution has a lower viscosity than a glucose solution, but will still set to a hard product. Maltose is also less ...
... aorta for oxygenated blood and pulmonary vein for deoxygenated blood. The spiral valve is essential to keeping the mixing of ... to deal with the high viscosity and density of water, which would otherwise impede rapid jaw closure. ... in which oxygenated blood from the lungs and de-oxygenated blood from the respiring tissues enters by separate atria, and is ... For this reason, early tetrapods may have experienced chronic hypercapnia (high levels of blood CO2). This is not uncommon in ...
At dietary intake levels of at least 3 g per day, oat fiber β-glucan decreases blood levels of LDL cholesterol and so may ... viscosity, branching structure, and gelation properties, causing diverse physiological effects in animals. ... An assay to detect the presence of (1,3)-β-D-glucan in blood is marketed as a means of identifying invasive or disseminated ... in people with normal or elevated blood cholesterol levels.[17] ...
For example, ultrasonic flowmeters are used for the measurement of such diverse fluids as liquid natural gas (LNG) and blood.[ ... These flowmeters are particularly sensitive to temperature changes affecting the fluid viscosity and the diameter of the flow ... very low flows at which the measured differential pressure is linearly proportional to the flow and to the fluid viscosity. ...
... the poise for dynamic viscosity and the stokes for kinematic viscosity.[40] ... Similarly, the millimetre of mercury (symbol mmHg) was retained for measuring blood pressure.[3]:127. ... Sphygmomanometer - the traditional device that measures blood pressure using mercury in a manometer. Pressures are recorded in ... for barometric and blood pressure were developed or propagated, some of which incorporated standard gravity in their ...
"Thermal Fluctuations of Red Blood Cell Membrane via a Constant-Area Particle-Dynamics Model". Biophysical Journal. 89 (4): ...
Because the reaction is slow, the Hb A1c proportion represents glucose level in blood averaged over the half-life of red blood ... Increased levels of this chemical are detected in the blood if red blood cells are being destroyed more rapidly than usual. ... Hemoglobin concentration measurement is among the most commonly performed blood tests, usually as part of a complete blood ... It measures the degree of glycation (glucose binding) to albumin, the most common blood protein, and reflects average blood ...
Polycythemias (or erythrocytoses) are diseases characterized by a surplus of red blood cells. The increased viscosity of the ... Several blood tests involve red blood cells. These include a RBC count (the number of red blood cells per volume of blood), ... Main article: Blood transfusion. Red blood cells may be given as part of a blood transfusion. Blood may be donated from another ... Packed red blood cells (pRBC) are red blood cells that have been donated, processed, and stored in a blood bank for blood ...
... blood concentrations of triglycerides, normal blood HDL-cholesterol concentrations, and normal blood glucose concentrations.[ ... Viscosity at 20 °C (68 °F). 84 cP. Refractive index. 1.4677-1.4705 (virgin and refined). 1.4680-1.4707 (pomace). ... maintenance of normal blood HDL cholesterol concentrations (ID 1316, 1332) and maintenance of normal blood glucose ... health claims on olive oil were approved for protection by its polyphenols against oxidation of blood lipids,[112] and for the ...
It was found that people living near mines in China had many times the levels of REEs in their blood, urine, bone and hair ... These fluids have very low viscosities and high element mobility, which allows for crystallization of large grains, despite a ...
Blood 4 × 10−3 10−2 - 100 Oils and long-chain hydrocarbons Linseed oil 0.028 ... Glass Viscosity Measurement - viscosity measurement, viscosity units and fixpoints, glass viscosity calculation ... Viscosity. A simulation of liquids with different viscosities. The liquid on the right has higher viscosity than the liquid on ... Viscoelastic solids may exhibit both shear viscosity and bulk viscosity. The extensional viscosity is a linear combination of ...
Silicon pressure sensors e.g., car tire pressure sensors, and disposable blood pressure sensors ... surface tension and viscosity) are more important design considerations than with larger scale mechanical devices. MEMS ... embossing or stereolithography and are especially well suited to microfluidic applications such as disposable blood testing ...
Kestin, J; Khalifa, H.E.; Wakeham, W.A. (1977). "The viscosity of five gaseous hydrocarbons". The Journal of Chemical Physics. ... "Blood Changes Under Ethylene Anæsthesia". Annals of Surgery. 86 (2): 260-7. doi:10.1097/00000658-192708000-00013. PMC 1399426 ...
... including red blood cells, white blood cells and platelets). Blood viscosity is determined by plasma viscosity, hematocrit ( ... In particular there is a specialist study of blood flow called hemorheology. This is the study of flow properties of blood and ... Therefore, red blood cell mechanics is the major determinant of flow properties of blood.[14] ... Since Sir Isaac Newton originated the concept of viscosity, the study of liquids with strain-rate-dependent viscosity is also ...
Other contributing factors may include upper airway obstruction, increased blood viscosity, abnormalities of cardiac origin ( ... Impaired arterial blood gas (oxygen) tensions during intense exercise, increased blood lactate, and rarely death have been ... The amount of blood visible in the trachea at the time of examination is most commonly graded on a scale of 0 (no blood) to 4 ( ... This post-exercise delay allows time for blood within the lungs to travel to the trachea.[17] Blood can usually be detected in ...
"Hypertension (High Blood Pressure)". Archived from the original on 2011-06-30. Retrieved 2010-12-21.. ... while unsaturated fats tend to be liquid at room temperature with varying degrees of viscosity (meaning both saturated and ... Abnormal blood lipid levels, that is high total cholesterol, high levels of triglycerides, high levels of low-density ... Labarthe, Darwin (2011). "Chapter 11 Adverse Blood Lipid Profile". Epidemiology and prevention of cardiovascular disease: a ...
... in analogy with blood.[17][18] Mott-Smith recalls, in particular, that the transport of electrons from thermionic filaments ... gas has a liquid like viscosity at atmospheric pressure and the free electric charges confer relatively high electrical ... reminded Langmuir of "the way blood plasma carries red and white corpuscles and germs."[19] ...
The surface rheology of surfactant layers, including the elasticity and viscosity of the layer, play an important role in the ...
Because of their low viscosity, it is very difficult to completely avoid crystallization while processing it through the glass ... allowing such applications as insertion into blood vessels via hypodermic needle. ...
... which overcomes the damping effect of the fluid's viscosity. For this reason turbulence is commonly realized in low viscosity ... In the medical field of cardiology, a stethoscope is used to detect heart sounds and bruits, which are due to turbulent blood ... The transition occurs if the size of the object is gradually increased, or the viscosity of the fluid is decreased, or if the ... A flow situation in which the kinetic energy is significantly absorbed due to the action of fluid molecular viscosity gives ...
Topical solutions can be marketed as drops, rinses, or sprays, are generally of low viscosity, and often use alcohol or water ... Absorption of medicament into blood stream. *Irritant effect. Properties which affect choice of an ointment base are:[citation ... with a high viscosity, that is intended for external application to the skin or mucous membranes. Ointments have a water number ...
Blood viscosity is the thickness of the blood and its resistance to flow as a result of the different components of the blood. ... Blood flow[edit]. Main article: Vascular resistance. The blood pressure in blood vessels is traditionally expressed in ... Blood vessels also circulate blood throughout the circulatory system Oxygen (bound to hemoglobin in red blood cells) is the ... Resistance is an accumulation of three different factors: blood viscosity, blood vessel length, and vessel radius.[2] ...
... the high viscosity method (a solvent of high viscosity is used), and the low viscosity slurry method (performed with low ... This method is used to separate the blood elements by using the cellulose membraned artificial kidney.[51] ... viscosity solvents).[20] Polystyrene is used as a medium for ion- exchange. It is made from the polymerization of styrene with ...
... s are commonly used to improve the visibility of blood vessels and the gastrointestinal tract. ... Various sorts of iodinated contrast agents exist, with variations occurring between the osmolarity, viscosity and absolute ...
ν = kinematic viscosity (viscosity/density). Notable Reynolds numbers: R , 0.5x106 = laminar flow threshold. R , 2.0x106 = ... Blood flow (+¾) and resistance (-¾) scale in the same way, leading to blood pressure being constant across species.[35] ... Density and viscosity of fluid.. *Length of the organism is factored into the equation because the surface area of just the ... Then on the other scale a blue whale that is much more massive and dense in comparison with the viscosity of the fluid, ...
Blood is supplied to the cervix by the descending branch of the uterine artery[8] and drains into the uterine vein.[9] The ... The viscosity and water content varies during the menstrual cycle; mucus is composed of around 93% water, reaching 98% at ... It is visible as a blood-tinged mucous discharge.[27] ...
... blood viscosity (the higher the viscosity, the higher the resistance)[60] and the number of vessels, particularly the smaller ... Disorders of blood pressure[edit]. Disorders of blood pressure control include high blood pressure, low blood pressure, and ... Blood pressure (BP) is the pressure of circulating blood on the walls of blood vessels. Most of this pressure is due to work ... Blood pressure in other animals[edit]. Blood pressure in non-human mammals is similar to human blood pressure. In contrast, ...
The concentration of the sulfuric acid is selected based on reaction rate and viscosity, which both increase with concentration ... and blood, as lungs and other internal organs can be penetrated by alpha radiation.[157] Internal exposure to thorium leads to ... albeit with viscosity retarding the reaction. Increasing the temperature also speeds up the reaction, but temperatures of 300 ° ...
Blood viscosity reducer agents. Class Summary. These agents decrease the viscosity of blood. ... May alter rheology of red blood cells, which, in turn, reduces blood viscosity ... Neurological manifestations in HTLV-I-infected blood donors. J Neurol Sci. 2003 Oct 15. 214(1-2):49-56. [Medline]. ... Common human T cell leukemia virus type 1 (HTLV-1) integration sites in cerebrospinal fluid and blood lymphocytes of patients ...
... notes Blood Flow Online. Blood viscosity is measured in millipoise units. An increase in blood viscosity is linked to major... ... The normal blood viscosity level for healthy adults is 40/100, ... notes Blood Flow Online. Blood viscosity is measured in ... What is a BUN blood test?. A: A blood urea nitrogen, or BUN, test is a blood test that determines the blood nitrogen level, ... An increase in blood viscosity is linked to major cardiovascular problems, including high blood pressure, lower high-density ...
G. M. El-Aragi, "Effect of Electrohydraulic Discharge on Viscosity of Human Blood," Physics Research International, vol. 2013, ... Effect of Electrohydraulic Discharge on Viscosity of Human Blood. G. M. El-Aragi ...
Thank you for your interest in spreading the word on Circulation.. NOTE: We only request your email address so that the person you are recommending the page to knows that you wanted them to see it, and that it is not junk mail. We do not capture any email address. ...
PubMed journal article Increased blood viscosity in diabetic proliferative retinopath were found in PRIME PubMed. Download ... AdultAgedBlood ViscosityDiabetic RetinopathyFemaleHumansMaleMiddle AgedRheology ... "Increased Blood Viscosity in Diabetic Proliferative Retinopathy." Diabetes Research (Edinburgh, Scotland), vol. 3, no. 2, 1986 ... Increased Blood Viscosity in Diabetic Proliferative Retinopathy. Diabetes Res. 1986;3(2):67-70. PubMed PMID: 3698481. ...
Blood viscosity is correlated with all known risk factors for cardiovascular disease - elevated blood viscosity is a strong ... For that reason a meaningful blood viscosity test requires two numbers: systolic blood viscosity (high shear rate), which is ... Blood viscosity is a measurement of the thickness and stickiness of an individuals blood. It is a direct measure of the ... The blood viscosity rises and falls from one extreme to the other with every cardiac cycle - much like blood pressure ...
Blood viscosity and blood density depends on what? and find homework help for other Science questions at eNotes ... Viscosity Blood is more viscous than water. Relative value of blood viscosity is 4.5, compared with the viscosity of water ... 1. Blood viscosity depends on the content of the blood, or the concentration of each of many components in the plasma fluid. It ... Blood viscosity and blood density are two different physical properties that are closly related and dedending on the properties ...
Clinical Aspects of Blood Viscosity and Cell Deformability, 9780387102993, available at Book Depository with free delivery ...
Blood test to evaluate hyperviscosity, monoclonal gammopathy syndromes, myeloma, macroglobulinemia & dysproteinemias, ... Test : Viscosity, Serum/ Serum Viscosity. Indications : Test is used to evaluate hyperviscosity syndromes associated with ... In IgG myeloma there is an increase in hyper-viscosity IgG levels. Kappa light chain myeloma is responsible for hyperviscosity ...
Microvisk Technologies develops and manufactures devices for measuring blood viscosity using the power of Micro Electronic ... Easy and Accurate Measurement of Blood Viscosity. Microvisk Technologies, North Wales, UK ...
University of Connecticut researchers have created a small electronic device that can measure blood viscosity quickly and ... In fact, one study found that increased blood viscosity is a more likely sign of a potential cardiac event than high blood ... But less attention has been paid to blood viscosity.. Viscosity measures a fluids resistance to flow. Thick or sticky liquids ... In the case of blood, higher viscosity may signal potential problems, since the heart needs to work harder to pump sticky blood ...
This article discusses the fundamentals for measuring the viscosity of whole blood, serum, and plasma and its application to ... Blood Viscosity / physiology*. Clinical Laboratory Techniques*. Humans. Pathology, Clinical / methods*. Plasma / physiology*. ... This article discusses the fundamentals for measuring the viscosity of whole blood, serum, and plasma and its application to ... 2280239 - Increased whole blood viscosity combined with decreased erythrocyte fluidity in untreat.... 19488109 - Three- ...
... G. C. Shit, M. Roy ... "Mathematical Modelling of Blood Flow through a Tapered Overlapping Stenosed Artery with Variable Viscosity," Applied Bionics ...
"Blood Viscosity" by people in Harvard Catalyst Profiles by year, and whether "Blood Viscosity" was a major or minor topic of ... The internal resistance of the BLOOD to shear forces. The in vitro measure of whole blood viscosity is of limited clinical ... "Blood Viscosity" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH (Medical Subject ... Elevated Blood Viscosity and Microrecirculation Resulting From Coronary Stent Malapposition. J Biomech Eng. 2018 05 01; 140(5). ...
PubMed journal article Blood viscosity and erythrocyte filterability: their evaluation in diabetes mellitu were found in PRIME ... AdolescentAdultAgedBlood ViscosityChildDiabetes Mellitus, Type 1Diabetes Mellitus, Type 2Diabetic AngiopathiesErythrocytes ... Caimi G. Blood Viscosity and Erythrocyte Filterability: Their Evaluation in Diabetes Mellitus. Horm Metab Res. 1983;15(10):467- ... Blood viscosity and erythrocyte filterability: their evaluation in diabetes mellitus.. Horm Metab Res 1983; 15(10):467-70HM ...
Shear Dependence of Effective Cell Volume as a Determinant of Blood Viscosity ... Shear Dependence of Effective Cell Volume as a Determinant of Blood Viscosity ... Shear Dependence of Effective Cell Volume as a Determinant of Blood Viscosity ... Shear Dependence of Effective Cell Volume as a Determinant of Blood Viscosity ...
... on blood viscosity and platelet adhesiveness during extracorporeal circulation were investigated. Blood viscosity was ... Effect of a Nonionic Surface-Active Agent on Blood Viscosity and Platelet Adhesiveness. FREDERICK L. GROVER, MICHAEL W. HERON, ... Effect of a Nonionic Surface-Active Agent on Blood Viscosity and Platelet Adhesiveness ... Effect of a Nonionic Surface-Active Agent on Blood Viscosity and Platelet Adhesiveness ...
The blood viscosity becomes anisotropic: Along the flow direction the viscosity is significantly reduced, but in the directions ... Abstract: B54.00007 : Magnetorheology for Reduction of Blood Viscosity, Turbulence, and Atherosclerosis*. 12:27 PM-12:39 PM. ... THe disturbed blood flow is thus suppressed, becomes laminar, and the blood circulation is greatly improved. Our recent tests ... Here we report our finding with magnetorheology: application of a strong magnetic field to blood along its flow direction, red ...
Association of Blood Pressure With Blood Viscosity in American Indians. The Strong Heart Study. Giovanni de Simone, Richard B. ... Association of Blood Pressure With Blood Viscosity in American Indians. The Strong Heart Study ... Association of Blood Pressure With Blood Viscosity in American Indians. The Strong Heart Study ... Association of Blood Pressure With Blood Viscosity in American Indians. The Strong Heart Study ...
Increases in platelet and red cell counts, blood viscosity, and arterial pressure during mild surface cooling: factors in ... Increases in platelet and red cell counts, blood viscosity, and arterial pressure during mild surface cooling: factors in ... Increases in platelet and red cell counts, blood viscosity, and arterial pressure during mild surface cooling: factors in ... Increases in platelet and red cell counts, blood viscosity, and arterial pressure during mild surface cooling: factors in ...
Zooming In on Blood Coagulation and Viscosity: Computation Takes On Blood Behavior. Simulations illuminate the inner workings ... while the other is trying to predict changes in blood viscosity by modeling individual red blood cells and their interactions. ... modeling changes in blood viscosity and simulating the kinds of abnormal red blood cell aggregation that occurs in diseases ... Medium Close-Up: Modeling Blood Viscosity. George Karniadakis, PhD, professor of applied mathematics at Brown University, also ...
... of α-linolenic fatty acid on blood pressure and complex blood vi ... Of course, the effects on blood viscosity cannot explain the ... of α-linolenic fatty acid on blood pressure and complex blood viscosity was investigated in spontaneously hypertensive rats. A ... Dierberger, B., Schäch, M., Anadere, I. et al. Effect of a diet rich in linseed oil on complex viscosity and blood pressure in ... Effect of a diet rich in linseed oil on complex viscosity and blood pressure in spontaneously hypertensive rats (SHR). *B. ...
Blood viscosity is the only biological parameter that has been correlated with all of the major cardiovascular risk factors ... Blood Pressure Diet Tips. * In another way, will the blood pressure regimen work? Hypertension can be present without knowing ... A blood pressure reading gives two digits - the first digit is systolic pressure, when the heart contracts and forces the blood ... Blood Pressure Diet Guide. Eat These Power Foods For The Ultimate High Blood Pressure Diet!. ...
Although the increase in Qc and blood flow during exercise probably promoted NO production due to shear dependent stimulation ... Blood was sampled at rest and at the end of exercise. The ηb was determined at high shear rate and was used to calculate ... We tested the effects of submaximal exercise on blood viscosity (ηb), nitric oxide production (NO) and hemodynamics. ... Connes, P., Pichon, A., Hardy-Dessources, M-D., Waltz, X., Lamarre, Y., Simmonds, M.J., & Tripette, J. (2012). Blood viscosity ...
Whole blood is a non-Newtonian liquid. Its viscosity changes with the applied shear stress. The blood viscosity rises and falls ... Blood viscosity is correlated with all known risk factors for cardiovascular diseases. Elevated blood viscosity is a strong ... Therefore, a meaningful blood viscosity test requires more than one measurement: systolic blood viscosity (high shear rate), ... Medical , Lovis 2000 M/ME and DMA 4500 M: Viscosity Measurement of Whole Blood. Increased blood viscosity is correlated with ...
Simply put, blood viscosity is the thickness and stickiness of blood. It is a direct measure of the ability of blood to flow ... Many studies have linked cholesterol with blood viscosity; LDL is consistently associated with higher blood viscosity, while ... Blood viscosity--the stickiness of blood and its ability to flow through vasculature--is a key CVD risk factor, and the only ... Blood viscosity is defined as the inherent resistance of blood to flow, and is a highly dynamic property. This is in contrast ...
... may reduce blood viscosity, however, only to worsen the turbulence because the Reynolds number goes up as the viscosity lowers ... Abstract: L60.00351 : Effect of Magnetic Field on Blood Viscosity and the development of Atherosclerotic Plaque in Mice*. ... Afterwards we measure the viscosity of blood collected from sacrificed mice. Also, plaque formation in the aortic arch was ... Risk of cardiac diseases increase greatly with high viscosity of blood. Also, atherosclerotic plaque develops in vasculature ...
What is Blood-Viscosity Reducing Drugs? Meaning of Blood-Viscosity Reducing Drugs medical term. What does Blood-Viscosity ... Looking for online definition of Blood-Viscosity Reducing Drugs in the Medical Dictionary? Blood-Viscosity Reducing Drugs ... Blood-Viscosity Reducing Drugs. Blood-Viscosity Reducing Drugs. Definition. Blood-viscosity reducing drugs are medicines that ... medical-dictionary.thefreedictionary.com/Blood-Viscosity+Reducing+Drugs,Blood-Viscosity Reducing Drugs,/a,. *Facebook ...
Cerebral blood flow is regulated by changes in blood pressure and in blood viscosity alike.. J P Muizelaar, E P Wei, H A Kontos ... Cerebral blood flow is regulated by changes in blood pressure and in blood viscosity alike. ... Cerebral blood flow is regulated by changes in blood pressure and in blood viscosity alike. ... Cerebral blood flow is regulated by changes in blood pressure and in blood viscosity alike. ...
Subcutaneous Ancrod Therapy in Peripheral Arterial Disease: Improvement in Blood Viscosity and Nutritional Blood Flow G. D. O. ... Improvement in Blood Viscosity and Nutritional Blood Flow. Clin Sci Mol Med 1 February 1977; 52 (2): 1P. doi: https://doi.org/ ... Subcutaneous Abdominal Adipose Tissue Blood Flow: Variation within and between Subjects and Relationship to Obesity Clin Sci ( ...
  • Whole blood measurement is more informative, because it is affected by the hematocrit value. (theengineer.co.uk)
  • While serum or plasma viscosity measurements play an important role in the clinical management of patients prone to hyper-viscosity syndrome, these tests do not account for hematocrit, blood cell deformability or factors increasing RBC (red blood cell) aggregation. (anton-paar.com)
  • Therefore, a meaningful blood viscosity test requires more than one measurement: systolic blood viscosity (high shear rate), which is affected by hematocrit, and plasma viscosity and diastolic viscosity (low shear rate), which is affected by several factors like stickiness of platelets, immune complexes that increase the aggregation of RBCs, triglycerides, cholesterol, and many more. (anton-paar.com)
  • BACKGROUND: Blood transfusion is used to treat acute anemia with the goal of increasing blood oxygen-carrying capacity as determined by hematocrit (Hct) and oxygen delivery (DO2). (uzh.ch)
  • A change in plasma osmotic pressure alters the hematocrit, that is, the volume concentration of red cells in the whole blood by redistributing water between the intravascular and extravascular spaces. (wikipedia.org)
  • Hematocrit values, plasma fibrinogen levels, and erythrocyte deformability are well- recognized factors affecting blood viscosity. (infiniteadz.com)
  • Along with hematocrit and erythrocyte deformability, plasma viscosity is a major determinant of blood viscosity. (bloodflowonline.com)
  • Under such a framework, because hematocrit is the strongest determinant of blood viscosity, modulation of erythropoietin activity would play a profound role in viscosity homeostasis. (bloodflowonline.com)
  • Premenopausal women have lower hematocrit and improved red blood cell properties, decreasing their blood viscosity levels and protecting the arteries close to the heart from injury, plaque and rupture. (bloodflowonline.com)
  • Blood and plasma viscosity, total lipids, triglycerides, total cholesterol, free fatty acids, fibrinogen, lipid-gram, and hematocrit were determined in 53 patients with occlusive arteriosclerosis in the lower limbs prior to and after ozone therapy. (medcapsules.com)
  • The viscosity comparison has been related to hematocrit value both on whole blood and suspended blood in a saline solution. (unisi.it)
  • Two hemorheological parameters were independently correlated with impedance (Z) measurements at 50 kHz: whole blood viscosity (WBV) (r=0.541, p=0.01) and hematocrit (Hct) (r=-0.686, p=0.01). (biomedsearch.com)
  • Blood urea, glucose, glycosylated haemoglobin and white cell count were also significantly higher, whereas haematocrit, red cell deformability and several other haematological and biochemical variables did not differ significantly in the 2 groups. (unboundmedicine.com)
  • But this measurement does not account for haematocrit, blood cell deformability or factors increasing RBC (red blood cell) aggregation. (theengineer.co.uk)
  • Tereno T, Himi A, Hamazuki T, Tamura Y, Kumayai A (1981) Effect of oral administration of highly purified eicosapentaenoic acid on platelet function, blood viscosity and red cell deformability in healthy human subjects. (springer.com)
  • In this study, we investigated the effect of ginkgoglycoside in two different doses (19.2 mg/day and 28.8 mg/day) on blood viscosity and erythrocyte deformability in 27 patients suffering from cerebrovascular insufficiency. (iospress.com)
  • In the first group, during 30 days a significant decrease in blood viscosity and a significant increase in erythrocyte deformability were observed. (iospress.com)
  • The aim of the present study was to test the effects of one year of HU therapy on blood rheology (RBC deformability and aggregation, blood viscosity), hematology and clinical profile in SCA adults. (haematologica.org)
  • We demonstrated that the improvement in RBC deformability and the decrease of RBC aggregates robustness in HU-treated patients limit the consequences of the increase of hemoglobin on blood viscosity. (haematologica.org)
  • Methods:The effects of the treatment course with PTX (100 mg/kg/day p.o. for six weeks) on BV, plasma viscosity, haematocrit, erythrocyte aggregation and deformability, mean AP (MAP), stroke volume (SV), CO, and TPR were studied in SHRs and in control Wistar Kyoto (WKY) rats. (iospress.com)
  • After amlodipine the plasma viscosity decreased and the erythrocyte deformability increased in the majority of patients. (diva-portal.org)
  • RBC deformability is decreased in patients with hereditary spherocytosis because of decreased amount of membrane and in sickle cell anaemia because altered viscosity of haemoglobin and membrane damage. (allaboutblood.com)
  • Deformability and aggregation of erythrocytes is responsible for changes in viscosity of blood as the flow rate increases. (allaboutblood.com)
  • A reduced red cell deformability seems to be balanced by other rheological changes to produce a net reduction of blood viscosity. (diva-portal.org)
  • Thus it is shown that the over all effect of adding a corticosteroid to a suspension of blood cells seems to be a decreased viscosity, in spite of the fact that a reduced deformability of red blood cells can be seen as a parallel phenomenon. (diva-portal.org)
  • Concentrated erythrocyte (i.e., red blood cell) suspensions flowing in microchannels have been simulated with an immersed-boundary lattice Boltzmann algorithm, to examine the cell layer development process and the effects of cell deformability and aggregation on hemodynamic and hemorheological behaviors. (elsevier.com)
  • Zhang, J, Johnson, PC & Popel, AS 2009, ' Effects of erythrocyte deformability and aggregation on the cell free layer and apparent viscosity of microscopic blood flows ', Microvascular Research , vol. 77, no. 3, pp. 265-272. (elsevier.com)
  • Younger RBCs have been shown to be softer (more deformability) and less sticky (lower aggregability) - two properties that cause a significant reduction in blood viscosity. (bloodflowonline.com)
  • Erythrocyte deformability refers to the ability of erythrocytes (red blood cells, RBC) to change shape under a given level of applied stress, without hemolysing (rupturing). (wikipedia.org)
  • Erythrocyte deformability is an important determinant of blood viscosity, hence blood flow resistance in the vascular system. (wikipedia.org)
  • Stored packed red blood cells (sometimes denoted "pRBC" or "StRBC") also experience changes in membrane properties like deformability during storage and related processing, as part of a broader phenomenon known as "storage lesion. (wikipedia.org)
  • While the clinical implications are still being explored, deformability can be indicative of quality or preservation thereof for stored RBC product available for blood transfusion. (wikipedia.org)
  • Perfusion (or perfusability) is a deformability-based metric that may offer a particularly physiologically-relevant representation of storage-induced deterioration of RBC occurring in blood banks, and the associated impacts of storage conditions/systems. (wikipedia.org)
  • When blood has a higher viscosity than normal, it moves more slowly through the cardiovascular system, notes Everyday Health. (reference.com)
  • In the case of blood, higher viscosity may signal potential problems, since the heart needs to work harder to pump sticky blood. (eurekalert.org)
  • In the left caudate CBF decreased 21% with hypotension and 18% with higher viscosity, more than on the right (p less than 0.01 and p less than 0.2, respectively). (ahajournals.org)
  • For liquids, it corresponds to the informal concept of "thickness": for example, syrup has a higher viscosity than water . (wikipedia.org)
  • for example, washing up liquid has a much higher viscosity than water. (alamy.com)
  • Blood rheology and haemostasis were assessed in 18 diabetics with proliferative retinopathy and in 18 diabetics without proliferative retinopathy, matched for age, sex, smoking habit and type, duration and treatment of diabetes. (unboundmedicine.com)
  • 5-(Hydroxymethyl)furfural restores low-oxygen rheology of sickle trait blood in vitro. (harvard.edu)
  • Chmiel H, Walitza E (1980) On the rheology of blood and synovial fluids. (springer.com)
  • Here, we will report our Magneto-Rheology research that addresses both turbulence suppression and viscosity reduction simultaneously. (aps.org)
  • Blood rheology and aging. (scielo.br)
  • Abnormal blood rheology has been shown to modulate the clinical severity and to also be involved in several complications of SCA. (haematologica.org)
  • 4 , 5 However, no study has of yet investigated the effects of HU therapy on blood viscosity and RBC rheology. (haematologica.org)
  • Blood is a non-Newtonian fluid , best studied using rheology rather than hydrodynamics. (wikipedia.org)
  • 4 th Grade Science A Simple Viscosity Test Giresh Ghooray Background Rheology is the study of the deformation and flow of matter, which includes solids, liquids, and gases. (sputtr.com)
  • These data, in the light of previous evidence that fitter people tend to have lower WBV, would indicate that blood rheology unrelated to HGB (or HCT) is related to performance in relatively homogeneous and already highly-trained athletes. (edu.au)
  • The effective cell volume is the fundamental determinant of blood viscosity. (sciencemag.org)
  • Aggregation of red blood cells (RBCs) is a major determinant of blood viscosity. (elsevier.com)
  • Proliferative retinopathy was associated with significantly higher levels of blood viscosity at high and low shear rates, which were related to higher levels of plasma viscosity and fibrinogen. (unboundmedicine.com)
  • Fibrous proteins like fibrinogen contribute more to plasma viscosity than globular proteins like albumin. (allaboutblood.com)
  • Plasma fibrinogen concentration and plasma viscosity are elevated in unstable angina pectoris and stroke and their higher values are associated with higher rate of major adverse clinical events. (nih.gov)
  • and plasma viscosity and diastolic viscosity (low shear rate), which is affected by several factors such as stickiness of platelets, immune complexes that increase the aggregation of RBCs, triglycerides, cholesterol, and many more. (theengineer.co.uk)
  • This lets him cover a larger territory in the circulatory system at a longer timescale, modeling changes in blood viscosity and simulating the kinds of abnormal red blood cell aggregation that occurs in diseases such as atherosclerosis, AIDS, myeloma, and diabetes mellitus. (bcr.org)
  • The same applies to the aggregation index, which is a measure of the aggregation tendency of red blood cells (RBC). (springer.com)
  • The challenges that come with measuring blood viscosity include sample volume limitations, evaporation and protein aggregation, among others. (rheosense.com)
  • An increase in blood viscosity can be caused either by a deformity of the shape of red blood cells (RBCs) which causes RBC aggregation and decreased blood flow or by any pathological elevation of the components of blood. (infiniteadz.com)
  • Due to the opposing effects of the cell free layer lubrication and the high viscosity of cell-concentrated core, the influence of aggregation is complex but the lubrication effect appears to dominate, causing the relative apparent viscosity to decrease with aggregation. (elsevier.com)
  • There have not been available techniques for measuring RBC aggregation and viscosity, simultaneously. (elsevier.com)
  • Both measurements of the laser-transmitted intensity and pressure with respect to time enable to determine the aggregation index and the viscosity. (elsevier.com)
  • Medicines, like Aspirin, may reduce blood viscosity, however, only to worsen the turbulence because the Reynolds number goes up as the viscosity lowers. (aps.org)
  • Luckily, you can reduce blood viscosity and clotting through earthing, according to research . (care2.com)
  • An example of cardiac mechanotransduction that is familiar to all physicians is the Frank-Starling law of the heart, which states that the volume of blood ejected from the left ventricle is a function of left ventricular end diastolic volume. (bloodflowonline.com)
  • The diastolic blood viscosity was highest in patients with SAO stroke a . (biomedcentral.com)
  • A study conducted at the University of Pittsburgh and published in Clinical Hemorheology and Microcirculation demonstrated on average 62% higher systolic blood viscosity and 25% higher diastolic blood viscosity in men over premenopausal women. (bloodflowonline.com)
  • A blood pressure reading gives two digits - the first digit is systolic pressure, when the heart contracts and forces the blood around your body. (blood-pressure-diet.com)
  • The relationship between BP and viscosity is such that, given a constant systolic BP, if blood viscosity increases, then the total peripheral resistance (TPR) will necessarily increase, thereby reducing blood flow. (infiniteadz.com)
  • Blood viscosity and erythrocyte filterability were assessed in forty-five diabetics subdivided for type and vascular complications. (unboundmedicine.com)
  • As for the erythrocyte filterability, it is evident that the Vrbc, obtained by filtering whole-blood, distinguishes diabetics from normals, whereas this does not happen with the DI, obtained by filtering red blood suspended (5%) in prefiltered autologous plasma. (unboundmedicine.com)
  • TY - JOUR T1 - Blood viscosity and erythrocyte filterability: their evaluation in diabetes mellitus. (unboundmedicine.com)
  • In the second group on the other hand, after dose reduction, the effect of the drug on blood viscosity and erythrocyte deform ability were diminished. (iospress.com)
  • Any reduction in viscosity after complete disruption of rouleaux depends on the capacity of the erythrocyte to change so that resistance offered to flow decreases. (allaboutblood.com)
  • Further increase in viscosity results in change in shape of the erythrocyte from biconcave to bullet shaped, parachute shapes and slipper shaped forms. (allaboutblood.com)
  • Blood samples from 10 healthy subjects were incubated with Ringer's solution (control) or Ringer´s solution + hydrocortisone (10 mg/L). Whole blood viscosity was studied in a rotational viscometer and erythrocyte filterability was measured in the St. George´s Filtrometer. (diva-portal.org)
  • Nevertheless the measurements are more complex as whole blood is a non-newtonian liquid and changes its viscosity with the applied shear stress. (theengineer.co.uk)
  • Blood behaves as a non-Newtonian fluid, which means that its viscosity changes depending on its velocity at any given time. (eurekalert.org)
  • In smaller vessels such as capillaries and arterioles, those particles cause blood to act like a non-Newtonian fluid , similar to ketchup, whose viscosity is subject to change. (bcr.org)
  • Whole blood is a non-Newtonian liquid. (anton-paar.com)
  • Power law and Carreau-Yasuda models were used to model the non-Newtonian behavior of the human whole blood. (caltech.edu)
  • Lack of dependence of cerebral blood flow on blood viscosity after blood exchange with a Newtonian O2 carrier. (mysciencework.com)
  • The results show that a fourfold variation in the viscosity of a Newtonian blood substitute does not result in differences in CBF values. (mysciencework.com)
  • The formed elements are platelets , white blood cells and red blood cells , the presence of these formed elements and their interaction with plasma molecules are the main reasons why blood differs so much from ideal Newtonian fluids. (wikipedia.org)
  • Normal blood plasma behaves like a Newtonian fluid at physiological rates of shear. (wikipedia.org)
  • Depending on whether the viscosity of fluids changes with flow rate or not fluids may be Newtonian of non-Newtonian. (allaboutblood.com)
  • The viscosity of Newtonian fluids like water, honey and oil does not change with flow rates. (allaboutblood.com)
  • The viscosity of blood, a non-Newtonian fluid, Blood viscosity increases with falling shear rates. (allaboutblood.com)
  • Plasma is a Newtonian fluid, its viscosity does not depend on flow characteristics, therefore it is simple to measure, especially in capillary viscosimeters. (nih.gov)
  • Viscosity Slide 1 Newtonian and non-Newtonian Fluids Newton's Law of Viscous Flow dz dv A F x η = If η is constant the fluid is called Newtonian. (sputtr.com)
  • A numerical study of hemodynamic parameters of pulsatile blood flow is presented in a stenotic artery with non-Newtonian models using ADINA. (srttu.edu)
  • Six non-Newtonian models were used to model the non-Newtonian behavior of blood, and their results were compared with the Newtonian model. (srttu.edu)
  • In minimum flow rate, Carreua-Yasuda model was more sensitive to the non-Newtonian behavior of blood compared to Carreua, Casson, and Power Law models. (srttu.edu)
  • Also, in that time period, Walburn-Schneck was less sensitive to non-Newtonian behavior of blood. (srttu.edu)
  • 8] M. Jahangiri, M. Saghafian, M.R. Sadeghi, "Effects of non-Newtonian behavior of blood on wall shear stress in an elastic vessel with simple and consecutive stenosis", Biomedical and Pharmacology Journal , Vol. 8, No. 1, pp. 123-131, (2015). (srttu.edu)
  • In IgG myeloma there is an increase in hyper-viscosity IgG levels. (medindia.net)
  • A quick search on the PubMed database reveals nearly 1,000 scientific papers linking blood viscosity to cardiovascular disease events and risk factors. (holisticprimarycare.net)
  • Decreases in whole blood viscosity, haematocrit and serum erythropoietin were found after amlodipine as well as metoprolol treatment. (diva-portal.org)
  • Haematocrit and cell deformity affect blood viscosity. (allaboutblood.com)
  • Blood viscosity increases with haematocrit in an exponential manner. (allaboutblood.com)
  • Viscosity depends on haematocrit. (allaboutblood.com)
  • This study investigated the relationships between resting whole blood viscosity (WBV), haemoglobin concentration (HGB), haematocrit (HCT), and performance in 25 highly-trained national squad rowers (11 women and 14 men). (edu.au)
  • Afterwards we measure the viscosity of blood collected from sacrificed mice. (aps.org)
  • The first commercial application of the system is to measure the viscosity of blood, with the idea that a hand-held reader can be used by the world's 10 million warfarin patients for self-monitoring of their blood to ensure they are receiving the correct dose of the blood-thinning drug. (iteamsonline.org)
  • 1. Blood viscosity depends on the content of the blood, or the concentration of each of many components in the plasma fluid. (enotes.com)
  • Although it behaves like a homogeneous fluid in large vessels such as arteries, human blood is really a suspension of solids (blood cells, platelets) that can alter their characteristics in response to chemical and physical provocation. (bcr.org)
  • One might be tempted to think of blood simply as an irrigation system for the body's organs, a carrier for hemoglobin and other important molecules, or as a hydrating and lubricating fluid. (holisticprimarycare.net)
  • Where a is the particle radius, ρ p , ρ f are the respectively particle and fluid density μ is the fluid viscosity, g is the gravitational acceleration. (wikipedia.org)
  • The viscosity of a fluid is a measure of its resistance to deformation at a given rate. (wikipedia.org)
  • Viscosity can be conceptualized as quantifying the internal frictional force that arises between adjacent layers of fluid that are in relative motion. (wikipedia.org)
  • This is because a force is required to overcome the friction between the layers of the fluid which are in relative motion: the strength of this force is proportional to the viscosity. (wikipedia.org)
  • A fluid with a high viscosity, such as pitch , may appear to be a solid . (wikipedia.org)
  • Viscosity, the internal friction between these layers, is a measure of thickness of a fluid. (allaboutblood.com)
  • The higher the viscosity, thicker the fluid. (allaboutblood.com)
  • The flow development process demonstrates how red blood cells migrate away from the boundary toward the channel center, while the suspending plasma fluid is displaced to the cell free layer regions left by the migrating cells. (elsevier.com)
  • An apparatus for detecting changes in the viscosity of a fluid comprises a cartridge having a fluid receiving/dispensing reservoir, one or more fluid-receiving chambers, and a conduit that permits fluid communication between the fluid receiving/dispensing reservoir and the fluid-receiving chamber. (google.co.uk)
  • Changes in the viscosity of the fluid are detected by determining the position of the ferromagnetic material in the fluid-receiving chamber. (google.co.uk)
  • 2. The apparatus of claim 1 wherein a viscosity-altering substance is placed within the cartridge such that fluid introduced into the cartridge will come into contact with the viscosity-altering substance. (google.co.uk)
  • 3. The apparatus of claim 1 further comprising at least two fluid-receiving chambers for comparing changes in viscosity of the fluid. (google.co.uk)
  • 10. The apparatus of claim 1 wherein the fluid is human blood. (google.co.uk)
  • 6/26/07 Introduction: Friction at the Molecular Level Viscosity is, essentially, fluid friction. (sputtr.com)
  • Viscosity of the fluid is calculated by measuring the speed of rotation. (sputtr.com)
  • VISCOSITY DEFINITIONS Viscosity Definition: A measure of the resistance of flow due to internal friction when one layer of fluid is caused to move in relationship to another layer. (sputtr.com)
  • Mills P., Rubi J.M., Quemada D. (1980) Suspensions Flow Described by Means of a Micropolar Fluid Theory and Apparent Viscosity of Aggregable Particles Suspension in a Couette Flow. (springer.com)
  • The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress. (alamy.com)
  • Viscosity is a property of the fluid which opposes the relative motion between the two surfaces of the fluid that are moving at different velocities. (alamy.com)
  • In simple terms, viscosity means friction between the molecules of fluid. (alamy.com)
  • The removed gas-supersaturated fluid mixes with blood provided by a blood pump, the mixing occurring within a liquid-to-liquid oxygenation assembly including a pressurizable chamber having inlets for the gas-supersaturated fluid and blood, the inlets advantageously arranged to create a vortical or cyclonic fluid flow within the chamber to promote mixing. (google.com)
  • The mixed fluid exits the chamber via an outlet for delivery to a patient (e.g., sub-selective delivery) or other site via a catheter, infusion guidewire, or other interventional fluid delivery device, the mixed fluid advantageously comprising blood having increased oxygen levels, i.e., oxygenated blood. (google.com)
  • Advantageously, the oxygenated blood is delivered at a target pO 2 greater than about 760 mm Hg and is delivered from the liquid-to-liquid oxygenation assembly or membrane oxygenator via a fluid conduit having an approximate pressure drop greater than the target pO 2 . (google.com)
  • The removed gas-supersaturated fluid mixes with blood within a liquid-to-liquid oxygenation assembly to form oxygenated blood for delivery to a patient. (google.com)
  • 2. The method, as set forth in claim 1 , wherein the fluid from the fluid supply comprises fluid isotonic to blood. (google.com)
  • It affects blood flow in large blood vessels, due to the increased frictional resistance between fluid laminae under laminar flow conditions. (wikipedia.org)
  • There is a broad range of factors affecting blood viscosity and viscosity. (enotes.com)
  • Of course, the effects on blood viscosity cannot explain the observed degree of blood-pressure lowering. (springer.com)
  • Despite the differences in haemodynamic mechanisms underlying the decrease in BP, amlodipine and metoprolol exert beneficial effects on blood viscosity. (diva-portal.org)
  • Its viscosity changes with the applied shear stress. (anton-paar.com)
  • Blood viscosity is the key parameter that modulates hemodynamic forces like shear stress and strain in the vessels, as well as blood pressure. (holisticprimarycare.net)
  • Deformation in red blood cells is induced by shear stress. (wikipedia.org)
  • Reasonable agreement for the viscosity values was found between the two methods with linear determination coefficients between the two measurement methods comprised between r2 = 0.7329 and 0.9263, depending on shear stress phase and the corresponding shear rate. (unisi.it)
  • Serum or plasma viscosity measurements have an important role in the clinical management of patients prone to hyperviscosity syndrome. (theengineer.co.uk)
  • In view of these findings, and of our recent demonstration that increased blood viscosity also exists in those patients with retinal vein occlusion who develop a similar proliferative retinopathy, we suggest that hyperviscosity may contribute to retinal ischaemia and hence proliferative retinopathy. (unboundmedicine.com)
  • This article discusses the fundamentals for measuring the viscosity of whole blood, serum, and plasma and its application to the diagnosis of hyperviscosity syndrome. (biomedsearch.com)
  • This phenomenon termed "rheological claudication" was reported in about 25% of patients with moderate to severe claudication and blood hyperviscosity. (springer.com)
  • In hyperviscosity syndromes plasma viscosity is better in follow-up than ESR. (nih.gov)
  • It is a direct measure of the ability of blood to flow through the blood vessels. (theengineer.co.uk)
  • It determines how much friction the blood causes against the vessels, how hard the heart has to work to pump the blood through the body, and how much oxygen is delivered to organs and tissues. (theengineer.co.uk)
  • Viscosity ensures laminar flow (in layers) of blood through the vessels, viscosity increasing over certain values aggravates circulation. (enotes.com)
  • Thick blood also means organs and tissues receive less oxygen and may cause damage to the lining of blood vessels due to increased friction as blood travels throughout the body. (eurekalert.org)
  • Thus hemodynamics explains the physical laws that govern the flow of blood in the blood vessels . (wikipedia.org)
  • Blood vessels are not rigid tubes, so classic hydrodynamics and fluids mechanics based on the use of classical viscometers are not capable of explaining hemodynamics. (wikipedia.org)
  • When the body's cells lack water, the brain sends a signal to the pituitary glad to secrete vasopressin, a chemical that causes constriction of the blood vessels. (infiniteadz.com)
  • Elsewhere in the blood vessels of the body atherosclerosis can be the cause of reduced blood circulation in the legs or in the kidneys. (allindianpatents.com)
  • This fist-sized organ, weighing less than a pound, beats 72 times a minute-more than 100,000 times a day-pumping from 2,500 to 5,000 quarts of blood through some 75,000 miles of blood vessels (almost 3 times around the earth at the equator), to nourish the 100 trillion or so cells that the body contains. (life-enthusiast.com)
  • Additionally, escalated viscosity can possibly affect pre-existing infections and the body is at a higher risk of developing clots or thrombosis in blood vessels. (pemfreviews.blog)
  • It also affects the microcirculatory blood flow significantly, where erythrocytes are forced to pass through blood vessels with diameters smaller than their size. (wikipedia.org)
  • Studies have shown that increased blood viscosity was significantly more prevalent in patients who experienced heart attacks and strokes compared to patients with lower blood viscosity. (eurekalert.org)
  • Omega-3 polyunsaturated fatty acids improve lipid profile and lower blood viscosity in CAPD patients. (wur.nl)
  • Yet despite this strong correlation, physicians can't currently evaluate blood viscosity at routine office visits. (eurekalert.org)
  • For this reason, the availability of a technique able to evaluate blood viscosity in a rapid and direct manner is welcome. (unisi.it)
  • The normal blood viscosity level for healthy adults is 40/100, notes Blood Flow Online. (reference.com)
  • Exercising also helps blood flow more easily because it improves artery health. (reference.com)
  • Viscosity measures a fluid's resistance to flow. (eurekalert.org)
  • G. C. Shit, M. Roy, and A. Sinha, "Mathematical Modelling of Blood Flow through a Tapered Overlapping Stenosed Artery with Variable Viscosity," Applied Bionics and Biomechanics , vol. 11, no. 4, pp. 185-195, 2014. (hindawi.com)
  • Oxygen-dependent flow of sickle trait blood as an in vitro therapeutic benchmark for sickle cell disease treatments. (harvard.edu)
  • It is well known that disturbed blood flow hemodynamics make different regions of the vasculature interface vulnerable to development of atherosclerotic plaque, and that growing plaque generates more biomechanical force to disturb blood flow. (aps.org)
  • Currently, there is no modality which targets disturbed blood flow to reduce growth atherosclerotic plaque. (aps.org)
  • Here we report our finding with magnetorheology: application of a strong magnetic field to blood along its flow direction, red blood cells are polarized in the magnetic field and aggregated into short chains along the flow direction. (aps.org)
  • The blood viscosity becomes anisotropic: Along the flow direction the viscosity is significantly reduced, but in the directions perpendicular to the flow the viscosity is considerably increased. (aps.org)
  • THe disturbed blood flow is thus suppressed, becomes laminar, and the blood circulation is greatly improved. (aps.org)
  • Understanding blood flow and coagulation is crucial to treating blood disorders such as hemophilia and thrombosis, and to dealing with diseases such as AIDS, malaria, and diabetes that have hematologic consequences. (bcr.org)
  • Nevertheless, a decrease in the viscosity can improve the flow conditions in the microcirculation, which may lead to a better oxygen supply. (springer.com)
  • Although the increase in Qc and blood flow during exercise probably promoted NO production due to shear dependent stimulation of the endothelium, the present results also support that the rise in ηb during exercise may be necessary for NO production and adequate vasodilation. (edu.au)
  • Blood viscosity--the 'stickiness' of blood and its ability to flow through vasculature--is a key CVD risk factor, and the only biological measure that correlates with all other major risk factors. (holisticprimarycare.net)
  • Also, atherosclerotic plaque develops in vasculature due to turbulence in blood flow. (aps.org)
  • When a strong magnetic field is applied along the blood flow direction, red blood cells are polarized, and aggregated into short chains, which lowers the viscosity along the flow direction. (aps.org)
  • Concurrently, viscosity is increased in the directions perpendicular to the flow. (aps.org)
  • Blood-viscosity reducing drugs are medicines that improve blood flow by making the blood less viscous (sticky). (thefreedictionary.com)
  • Cerebral blood flow is regulated by changes in blood pressure and in blood viscosity alike. (ahajournals.org)
  • Moreover, some authors have observed that reductions in cerebral blood flow have been linked to reduced cognitive function in older people and patients with Alzheimer's disease ( 4 4. (scielo.br)
  • Ogoh S, Tsukamoto H, Hirasawa A, Hasegawa H, Hirose N, Hashimoto T. The effect of changes in cerebral blood flow on cognitive function during exercise. (scielo.br)
  • However, increasing Hct also increases blood viscosity, which may thus lower DO2 if the arterial circulation is a rigid hydraulic system as the resistance to blood flow will increase. (uzh.ch)
  • Our model accounts for O2 diffusion out of the circulation before blood arriving to the nutritional circulation and for changes in blood flow velocity. (uzh.ch)
  • Microvascular blood flow (MBF) impairment in patients with lower extremity arterial disease (LEAD) is associated with more severe major adverse limb events (MALE). (springer.com)
  • This project aims to optimise the hemodynamics (blood flow) in coronary arteries with high curvatures and bifurcations. (edu.au)
  • Lack of dependence of cerebral blood flow on blood viscosity a. (mysciencework.com)
  • Whether the increase in cerebral blood flow measured after hemodilution is mediated by a decrease in blood viscosity or in oxygen delivery to the brain is debated. (mysciencework.com)
  • Hemodynamics is the study of blood flow in the cardiovascular system. (rheosense.com)
  • Hemodynamics or hæmodynamics is the dynamics of blood flow . (wikipedia.org)
  • Blood flow ensures the transportation of nutrients , hormones , metabolic wastes, O 2 and CO 2 throughout the body to maintain cell-level metabolism , the regulation of the pH , osmotic pressure and temperature of the whole body, and the protection from microbial and mechanical harms. (wikipedia.org)
  • The study of the blood flow is called hemodynamics . (wikipedia.org)
  • The study of the properties of the blood flow is called hemorheology . (wikipedia.org)
  • Blood cells disrupt flow lines of plasma and increase viscosity. (allaboutblood.com)
  • Erythrocytes are the most numerous and under physiological conditions the flow properties of blood depend on the properties of plasma and erythrocytes. (allaboutblood.com)
  • The physiological significance of this phenomenon is to maintain the native structure of blood flow. (scirp.org)
  • These excess cells thicken your blood, slowing its flow, which may cause serious problems, such as blood clots. (infiniteadz.com)
  • therefore, any condition that causes viscosity to increase will also increase resistance and decrease flow. (infiniteadz.com)
  • Conversely, when viscosity decreases, blood flow and perfusion will increase. (infiniteadz.com)
  • Thick or viscous blood tends to coagulate and form unwanted blood clots that can block blood flow to the heart or brain, causing a heart attack or stroke. (infiniteadz.com)
  • According to this study , walking on a natural surface can improve blood flow to your face. (care2.com)
  • The results of the study showed that participants who had direct contact with the earth had increased blood flow to the face and enhanced skin tissue repair. (care2.com)
  • In paper 4is described the complex effect of corticosteroids on flow properties of red blood cells. (diva-portal.org)
  • Got Blood Flow related question? (bloodflowonline.com)
  • In addition, the slit-flow aggregometer can be easily used in a clinical setting owing to the incorporation of a disposable element that holds the blood sample. (elsevier.com)
  • People with poor blood flow, frequent flying, blood clot can also use this laser watch treatment. (made-in-china.com)
  • Tissue edema limits the blood flow inside the body causing heightened viscosity in the body part of the edema. (pemfreviews.blog)
  • These activities within the body can reduce the smooth flow of blood circulation throughout the body causing thickness in the blood. (pemfreviews.blog)
  • Thrombosis and clots can cause some serious changes in the flow of blood and the body. (pemfreviews.blog)
  • Research studies have used different types of PEMF energy waves and magnetic fields to restore the blood viscosity and improve the flow of blood. (pemfreviews.blog)
  • Anytime a PEMF device is connected unto the body, any flow of blood passing beneath the magnetic field that is generated by the unit will be impacted. (pemfreviews.blog)
  • The apparent viscosity of aggregable suspensions is calculated in a Couette flow. (springer.com)
  • right ventricular stroke volume pulmonary venous blood flow to the left ventricle, thereby increasing left ventricular preload and stroke volume. (scribd.com)
  • Blood flow was considered laminar, and arterial wall was considered rigid. (srttu.edu)
  • 1] T. Bodnar, A. Sequeira, M. Prosi, "On the shear-thinning and viscoelastic effects of blood flow under various flow rates", Applied Mathematics and Computation , Vol. 217, No. 11, pp. 5055-5067, (2011). (srttu.edu)
  • Blood viscosity (BV) is a measurement of the intrinsic resistance of blood to flow, and high BV increases thromboembolic risk. (e-jnc.org)
  • Blood viscosity (BV) is a measurement of the intrinsic resistance of blood to flow and is characterized by blood thickness and stickiness [ 1 - 3 ]. (e-jnc.org)
  • Shape change of erythrocytes under applied forces (i.e., shear forces in blood flow) is reversible and the biconcave-discoid shape, which is normal for most mammals, is maintained after the removal of the deforming forces. (wikipedia.org)
  • The in vitro measure of whole blood viscosity is of limited clinical utility because it bears little relationship to the actual viscosity within the circulation, but an increase in the viscosity of circulating blood can contribute to morbidity in patients suffering from disorders such as SICKLE CELL ANEMIA and POLYCYTHEMIA. (harvard.edu)
  • The effects of Pluronic F68, a nonionic surface-active agent, on blood viscosity and platelet adhesiveness during extracorporeal circulation were investigated. (ahajournals.org)
  • The main use of blood-viscosity reducing drugs is to relieve painful leg cramps caused by poor circulation, a condition called intermittent claudication . (thefreedictionary.com)
  • In contrast to normal blood, UPBHB yields a constant and defined viscosity in the brain circulation, since its viscosity is not dependent on the shear rate. (mysciencework.com)
  • This can influence the mechanics of the circulation and may complicate the measurement of blood viscosity . (wikipedia.org)
  • A person with 'thick' blood may be at higher risk for stroke, according to a new study in today's Circulation: Journal of the American Heart Association. (infiniteadz.com)
  • As the heart continues pumping blood, the entire circulation of blood within the body will be transformed. (pemfreviews.blog)
  • However, very accurate measurements are necessary to properly monitor the changes in viscosity that can help doctors diagnose cardiovascular diseases, anemia, and many other blood related issues patients may have. (rheosense.com)
  • Furthermore, when blood is taken for examination in vitro, the viscosity and coagulation parameters of blood are influenced to a certain extent and do not therefore give an accurate representation of the properties of blood in vivo. (allindianpatents.com)
  • We previously showed that arterial wall viscosity (AWV) was 3-fold lower in vivo than in vitro and suggested that in vivo active mechanisms could minimize intrinsic AWV to improve the efficiency of heart-vessel coupling energy balance. (ahajournals.org)
  • 6 7 8 9 We used this approach in a recent study 10 and showed that the viscosity measured in vivo in intact animals was 3-fold lower than viscosity measured in vitro at the same arterial site under similar pressure conditions. (ahajournals.org)
  • measurement-of-whole-blood - .PDF file. (theengineer.co.uk)
  • We hope the information in this review will be useful to pathologists and clinical laboratory staff in explaining the available choices for measuring serum, plasma, and whole blood viscosity. (biomedsearch.com)
  • This paper presents the experimental work on the measurement of unadulterated human whole blood viscosity using a capillary-based microfluidic viscometer. (caltech.edu)
  • The role of whole blood viscosity in premature coronary artery disease in women. (ugent.be)
  • Conclusions:Treatment with PTX attenuated whole blood viscosity, but did not affect the AP and hemodynamic parameters in the experimental SHRs compared with the control SHRs. (iospress.com)
  • A significant difference in whole blood viscosity was detected in this study when assessing a high-pH, electrolyte water versus an acceptable standard purified water during the recovery phase following strenuous exercise-induced dehydration. (biomedcentral.com)
  • The changes in shape and flexibility affect the mechanical properties of whole blood. (wikipedia.org)
  • This in turn affects the mechanics of the whole blood. (wikipedia.org)
  • During acute normovolemic hemodilution, (ANH) blood subsequently lost during surgery contains proportionally fewer red blood cells per millimetre, thus minimizing intraoperative loss of the whole blood. (wikipedia.org)
  • Serum bilirubin and lipoprotein-a: How are these associated with whole blood viscosity? (edu.au)
  • The absence of a simple and clinically practical method to determine whole blood viscosity can partly justify why the medical community has been slow in realizing the significance of whole blood viscosity. (unisi.it)
  • Furthermore, a comparison of whole blood viscosity as measured by the two instruments was done on blood samples collected from hospitalized patients. (unisi.it)
  • Blood viscosity and hemodynamics during exercise" by Philippe Connes, Aurélien Pichon et al. (edu.au)
  • We tested the effects of submaximal exercise on blood viscosity (ηb), nitric oxide production (NO) and hemodynamics. (edu.au)
  • A significant prolongation of the distance walked painlessly, reduction in blood and plasma viscosity as well as the decrease in total cholesterol after therapy with ozone correlated with a decrease of the blood viscosity. (medcapsules.com)
  • From heart attacks to strokes, routine blood tests can screen for several types of life-threatening cardiac events. (eurekalert.org)
  • In fact, one study found that increased blood viscosity is a more likely sign of a potential cardiac event than high blood pressure, gender, or smoking. (eurekalert.org)
  • The research shows there is a connection between blood viscosity and cardiac events, and the equipment exists to test it, but not in a practical or efficient way. (eurekalert.org)
  • A few minutes after the sample is placed on the microchannel, a digital screen displays a viscosity reading that indicates whether the patient is at elevated risk for cardiac events. (eurekalert.org)
  • Au v D, Brandle M, Rupp H, Jacob R (1988) Influence of a diet rich in fish oil on blood pressure, body weight and cardiac hypertrophy in spontaneously hypertensive rats. (springer.com)
  • Risk of cardiac diseases increase greatly with high viscosity of blood. (aps.org)
  • After blood replacement, systemic parameters such as cardiac index, arterial blood pressure, blood gases, and acid-base status were not different between the UPBHB and the UPBHB-PVP groups. (mysciencework.com)
  • stroke volume cardiac output and arterial blood pressure. (scribd.com)
  • Examples of blood-viscosity reducing drugs are pentoxifylline (Trental) and oxypentifylline. (thefreedictionary.com)
  • Anyone who has had unusual reactions to pentoxifylline, aminophylline, caffeine , dyphylline, ethylenediamine (contained in aminophylline), oxtriphylline, theobromine, or theophylline in the past should let his or her physician know before taking a blood-viscosity reducing drug. (thefreedictionary.com)
  • From the obtained data, it is evident that blood viscosity at high shear rates does not distinguish diabetics from normals nor diabetics from one another, whereas at low shear rates it is able to differentiate normals from diabetics and diabetics with and without vascular complications. (unboundmedicine.com)
  • Ohkubo T, Rupp H, Jacob R (1991) Effect of linseed oil feeding on blood pressure, vascular prostanoids and fatty acids in shr. (springer.com)
  • Plasma viscosity: is a biomarker for the differential diagnosis of Alzheimer's disease and vascular dementia? (scielo.br)
  • The latter depends on vascular hindrance and blood viscosity (BV). (iospress.com)
  • Elevated blood viscosity directly increases systemic vascular resistance, which can be sensed by stretch receptors in the left ventricle. (bloodflowonline.com)
  • The end result of this pathway is decreased red cell mass, blood viscosity, and systemic vascular resistance. (bloodflowonline.com)
  • Pal S, Ellis V. The chronic effects of whey proteins on blood pressure, vascular function, and inflammatory markers in overweight individuals. (nature.com)
  • Increases in platelet and red cell counts, blood viscosity, and arterial pressure during mild surface cooling: factors in mortality from coronary and cerebral thrombosis in winter. (bmj.com)
  • Therefore, we have zeroed in on vulnerable blood: Blood that is too thick or sticky, that increases friction and, causes biomechanical abrasion, injury and inflammation at the arterial wall. (holisticprimarycare.net)
  • Clinically significant increases in viscosity are most common in patients with increased immunoglobulin, both monoclonal and polyclonal. (allaboutblood.com)
  • Quick Answer: What Happens If Blood Viscosity Increases? (infiniteadz.com)
  • It is known that the risk of thrombosis and atherosclerotic complications increases with an increase in the viscosity of the blood. (allindianpatents.com)
  • An increase in blood volume increases central venous pressure. (scribd.com)
  • A decrease in blood pressure by 59 mm Hg was found compared to the age-matched, untreated control group. (springer.com)
  • Haemodilution and a decrease in serum erythropoietin may be factors underlying this decrease in blood viscosity. (diva-portal.org)
  • In this application note, we present m -VROC ® measurements of blood-based solution viscosity as a function of shear rate and temperature. (rheosense.com)
  • We hypothesized that active mechanisms could compensate for intrinsic viscosity under physiological conditions to improve the efficiency of the heart-vessel coupling energy balance. (ahajournals.org)
  • Several important characteristics of microscopic blood flows observed experimentally have been well reproduced in our model, including the cell free layer, blunt velocity profile, changes in apparent viscosity, and the Fahraeus effect. (elsevier.com)
  • Singer P, Berger J, Luck K, Tauber CH, Naumann E, Gödicke W (1986) Long-term effect of mackerel diet on blood pressure serum lipids and thromboxane formation in patients with mild essential hypertension. (springer.com)
  • Untreated, high blood pressure also called hypertension can lead to a heart attack and a cerebrovascular accident. (blood-pressure-diet.com)
  • CBF increased in the left caudate 56% with hypertension and 47% with lower viscosity, again much more than on the right (p less than 0.001 and p less than 0.01, respectively). (ahajournals.org)
  • Hypertension- High blood pressure is common in people who are chronically dehydrated. (infiniteadz.com)
  • This causes blood pressure to increase which leads to hypertension. (infiniteadz.com)
  • Appreciation of blood viscosity has provided important insights into the pathogenesis of other cardiovascular diseases, such as atherosclerosis , hypertension , and the metabolic syndrome . (bloodflowonline.com)
  • Whey protein lowers blood pressure and improves endothelial function and lipid biomarkers in adults with prehypertension and mild hypertension: results from the chronic Whey2Go randomized controlled trial. (nature.com)
  • It depends on the concentration of red blood cells and the proteins present in the plasma. (enotes.com)
  • When a suspension is sheared, the red blood cells deform and spin because of the velocity gradient, with the rate of deformation and spin depending on the shear-rate and the concentration. (wikipedia.org)
  • Hemodilution is the dilution of the concentration of red blood cells and plasma constituents by partially substituting the blood with colloids or crystalloids . (wikipedia.org)
  • Plasma viscosity varies with the concentration of its constituents. (allaboutblood.com)
  • The Pittsburgh group wrote "the increase in the concentration of young RBCs and decrease in the concentration of old RBCs in the human blood resulting from blood loss is of a great importance for the prevention of cardiovascular diseases. (bloodflowonline.com)
  • Chapter6 Viscosity 6.1 Introduction Viscosity of a polymer solution depends on concentration and size (i.e. , molecular weight) of the dissolved polymer. (sputtr.com)
  • Using modified Lees-Edwards boundary conditions and directly calculated viscous dissipation, we show that it is possible to recover excellent agreement with the Einstein viscosity formula in the low concentration limit and to predict viscosity corrections for larger concentrations. (semanticscholar.org)
  • Thick or sticky liquids like honey have high viscosity, while thin, watery liquids have low viscosity. (eurekalert.org)
  • Commercial rheometers require large samples, take much longer, cost thousands of dollars, and are also commonly used to measure the viscosity of industrial liquids like oil, paint, or personal care products. (eurekalert.org)
  • A simulation of liquids with different viscosities. (wikipedia.org)
  • The Viscosity of Liquids and its RelatIOU t Chemical Constitution. (alamy.com)
  • The challenge for the i-Team is to look at the use of the micro-cantilever system, both in its current bench top form, and its future hand-held form, and assess how it might best be used for blood measurements, as well as for the measurement of the viscosity of other biological and non-biological fluids. (iteamsonline.org)
  • In-Tank Sensors: Model M8BO and M8B (0.1-100,000 cps) Reactor Sensor: Model M10 (1-1M cps) Reactor/ In-Line Sensor: Model M20 (1,000 - 1M cps) In-Line Sensor: Model M24 (0.1-7,000 cps) The Shell Cup is a simple, reliable device for measuring the viscosity of a wide range of fluids. (sputtr.com)
  • In these cases, the pull of gravity causes blood to accelerate when a person is standing upright, elevating blood pressure in the legs and increasing friction. (holisticprimarycare.net)
  • Chmiel H, Anadere I, Walitza E (1990) The determination of blood viscoelasticity in clinical hemorheology. (springer.com)
  • Elevated Blood Viscosity and Microrecirculation Resulting From Coronary Stent Malapposition. (harvard.edu)
  • Elevation of plasma viscosity correlates to the progression of coronary and peripheral artery diseases. (nih.gov)
  • Blood viscosity is correlated with all known risk factors for cardiovascular disease - elevated blood viscosity is a strong independent predictor of cardiovascular events. (theengineer.co.uk)
  • Red cell clumping is seen with cardiovascular disease, and it is increased due to abnormal electrical charge (zeta potential*) on red blood cells. (rainbow.coop)
  • Blood viscosity is a measurement of the thickness and stickiness of an individual's blood. (theengineer.co.uk)
  • Simply put, blood viscosity is the thickness and stickiness of blood. (holisticprimarycare.net)
  • Problems with blood thickness can occur from birth, or develop later in life. (infiniteadz.com)
  • Blood thickness may be affected by foods, drugs, and various medical conditions. (infiniteadz.com)
  • Viscosity, in terms of blood refers to its thickness. (pemfreviews.blog)
  • Blood is more viscous than water. (enotes.com)
  • Viscosity is the material property which relates the viscous stresses in a material to the rate of change of a deformation (the strain rate). (wikipedia.org)
  • Erythrocyes with viscous cytoplasm (HbS and HbC) resist change in shape increasing viscosity of blood in these diseases. (allaboutblood.com)
  • The more viscous the blood, the harder the heart must work to move it around the body and the more likely it is to form clots inside arteries and veins. (infiniteadz.com)
  • An increase in blood viscosity is linked to major cardiovascular problems, including high blood pressure, lower high-density lipoprotein levels, lower low-density lipoprotein levels and Type 2 diabetes. (reference.com)
  • High levels of AST in the blood usually indicate ac. (reference.com)
  • What are the indications of a high MCH blood count? (reference.com)
  • A high corpuscular hemoglobin count indicates the body's red blood cells are larger than usual, typically as a result of anemia caused by myelodysplasia, l. (reference.com)
  • Doctors are often on the lookout for some common signs that might point to an issue, like abnormal cholesterol levels or high blood pressure. (eurekalert.org)
  • Its potential in the treatment of diseases in which high viscosity or increased platelet adhesiveness are present deserves investigation. (ahajournals.org)
  • Eat These Power Foods For The Ultimate High Blood Pressure Diet! (blood-pressure-diet.com)
  • If you are looking to replace sugar, or already use another type of sweetener, stevia seems to be the best choice for those who have high blood pressure. (blood-pressure-diet.com)
  • Limit salt and those high-sodium foods that increase blood pressure Chopped beans Coated beans can be loaded with sodium for preservation purposes. (blood-pressure-diet.com)
  • Increased blood viscosity is correlated with all known risk factors for cardiovascular diseases including high blood pressure, cholesterol, diabetes, and side-effects of smoking. (anton-paar.com)
  • Image: Sergey Panteleev www.istockphoto.com) reased blood viscosity is the only biological parameter that has been linked with all of the other major cardiovascular risk factors, including high blood pressure, elevated LDL cholesterol, low HDL, type-II diabetes, metabolic syndrome, obesity, smoking, age, and male gender. (holisticprimarycare.net)
  • Importantly, high blood viscosity is easily modifiable with safe lifestyle-based interventions. (holisticprimarycare.net)
  • One study demonstrated a significant correlation between decreased cognitive function and increased blood viscosity, suggesting that high blood viscosity is an important factor in cognition to be investigated in future studies ( 5 5. (scielo.br)
  • The following biomarkers were assessed at baseline and during their recovery period: blood viscosity at high and low shear rates, plasma osmolality, bioimpedance, and body mass, as well as monitoring vital signs. (biomedcentral.com)
  • After exercise-induced dehydration, consumption of the electrolyzed, high-pH water reduced high-shear viscosity by an average of 6.30% compared to 3.36% with standard purified water ( p = 0.03). (biomedcentral.com)
  • However, a mixed model analysis validated the effect of high-pH water on high-shear viscosity when compared to standard purified water ( p = 0.0213) after controlling for covariates such as age and baseline values. (biomedcentral.com)
  • How do you lower high blood viscosity? (infiniteadz.com)
  • Why is high viscosity bad? (infiniteadz.com)
  • Medical Laser, Medical Laser Machine, Medical Therapy Machine manufacturer / supplier in China, offering Medical Laser Machine for Reducing High Blood Viscosity, Therapy Machine Acupuncture Device Laser Therapeutic Instrument, Low Level Laser Therapy Pain Relief Instrument for Rehabilitation Therapy and so on. (made-in-china.com)
  • After about 2-3 months treatment, you can do blood detect /CT detect, high blood viscosity/high blood pressure will get gradually back to a normal level. (made-in-china.com)
  • It can be used combined with reducing high blood pressure drug, reduce the dependence on drugs and decrease the side effect of drugs at the same time. (made-in-china.com)
  • While high blood viscosity is a major issue that threatens the physical body, there are many ways that can treat this health condition. (pemfreviews.blog)
  • Alternately, the blood may be provided by the pump to a high pressure hollow fiber or other type membrane oxygenator within which oxygen, advantageously provided at a pressure greater than atmospheric, diffuses across the membrane(s) and into the blood to form oxygenated blood, again for delivery to a patient or other site. (google.com)
  • The researchers also noted that the blood of the patients would have high levels of D-dimer , which is a protein produced when a clot is degraded. (news-medical.net)
  • The viscosity was measured by monitoring the time-varying length and mean advancing velocity of the blood column inside the viscometer. (caltech.edu)
  • Blood viscosity can be measured by viscometers capable of measurements at various shear rates, such as a rotational viscometer. (infiniteadz.com)
  • What are good blood viscosity measurements? (reference.com)
  • Blood properties strongly affect viscosity and as a result, viscosity measurements enable blood characterization. (rheosense.com)
  • The net effect of transfusion on DO2 in this system can be analyzed by using the relationship between Hct and systemic blood viscosity of circulating blood at the posttransfusion Hct to calculate DO2 and comparing this value with pretransfusion DO2. (uzh.ch)
  • The blood wicks into the microchannel and flows through a small groove using its own capillary pressure. (eurekalert.org)
  • The 3 main categories of instrumentation for viscosity measurement--capillary, falling-sphere, and rotational viscometers--are discussed. (biomedsearch.com)
  • Refining blood viscosity is vital for the body since intense viscosity can often cause an unsuccessful release of hormones, nutrition and other biological chemicals into tissues locally, particularly at the capillary stage. (pemfreviews.blog)
  • The influence of a diet rich in linseed oil (10 % in weight) with a content of 61.2 % of α-linolenic fatty acid on blood pressure and complex blood viscosity was investigated in spontaneously hypertensive rats. (springer.com)
  • The viscosity of suspensions of human erythrocytes (normal cells in plasma, normal cells in Ringer's solution containing albumin, and hardened cells in Ringer's solution containing albumin) was measured over a wide range of shear rates, and the macrorheological data were correlated with the microrheological behavior of erythrocytes and rigid particles. (sciencemag.org)
  • Shear viscosity of bulk suspensions at low Reynolds number with the three-dimensional lattice Boltzmann method. (semanticscholar.org)
  • This can lead to blood clots, and it can also reduce or block the amount of oxygen that flows to the legs or vital organs. (reference.com)
  • In the present study, blood was replaced by an oxygen-carrying blood substitute, ultrapurified, polymerized, bovine hemoglobin (UPBHB). (mysciencework.com)
  • Currently, to measure blood viscosity physicians would typically need to send large samples to an off-site lab for analysis in a rheometer, an instrument that measures viscosity mechanically. (eurekalert.org)
  • Blood Viscosity" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (harvard.edu)