Blood Viscosity
Mostrando 25-36 de 96 artigos, teses e dissertações.
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25. Hyperfibrinogenaemia and hyperviscosity in sickle-cell crisis.
Plasma fibrinogen concentration and whole-blood viscosity, the latter measured at two shear rates (23 and 230 sec-1), were estimated during eight episodes of sickle-cell crisis and compared with values in 26 sickle-cell anaemia patients who were not in crisis. Painful crisis was associated with a significant increase in both plasma fibrinogen and whole-blood
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26. Blood viscosity, coagulation, and activated protein C resistance in central retinal vein occlusion: a population controlled study.
BACKGROUND: The role of blood viscosity and haemostasis has been investigated in mixed groups of patients with branch and central retinal vein occlusion (CRVO) with conflicting results. This may have partly been due to the different aetiologies of these two types of vein occlusion. METHODS: In this study viscosity and coagulation (including activated protein
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27. Blood hyperviscosity with reduced skin blood flow in scleroderma
The vascular complications of scleroderma have previously been attributed to the progressive obliteration of small vessels. Our study was carried out to determine whether abnormalities of blood viscosity occur in this disease, thereby contributing to the ischaemic process. Blood viscosity was measured in 20 patients using a rotational viscometer. At a high r
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28. Plasma viscosity in inflammatory bowel disease.
AIMS: To assess the relation of plasma viscosity to disease activity in patients with inflammatory bowel disease. METHODS: Crohn's disease (n = 60) and ulcerative colitis (n = 71) were diagnosed on the basis of typical histological or radiological features. Active Crohn's disease was defined as a Crohn's disease activity index of 150 or over. Active ulcerati
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29. Rheology of Leukocytes, Leukocyte Suspensions, and Blood in Leukemia POSSIBLE RELATIONSHIP TO CLINICAL MANIFESTATIONS
Suspensions of leukemic lymphocytes and myeloblasts and blood of leukemic patients were studied to examine (a) the effect of leukemic cells on blood viscosity and (b) the ability of leukemic cells to traverse channels of capillary diameter. The viscosity of suspensions of leukemic cells was dependent logarithmically on (a) shear strain rate and (b) cytocrit,
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30. Abnormal rheology of oxygenated blood in sickle cell anemia
The viscosity of oxygenated blood from patients with sickle cell anemia (Hb SS disease) was found to be abnormally increased, a property which contrasts with the well recognized viscous aberration produced by deoxygenation of Hb SS blood. Experiments designed to explain this finding led to considerations of deformation and aggregation, primary determinants o
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31. A Method for Measuring Plasma Viscosity and a Comparison of Plasma Viscosity with Blood Sedimentation Rate in Rheumatoid Arthritis
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32. IMPROVEMENTS IN CALCULATION OF RENAL RESISTANCE TO BLOOD FLOW. CHARTS FOR OSMOTIC PRESSURE AND VISCOSITY OF BLOOD
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33. Viscosity and retinal vein thrombosis.
Whole-blood and plasma viscosity with haematological and biochemical investigations were measured in 44 patients with retinal vein occlusion. The patients were subdivided on the basis of fluorescein angiographic findings into: 1. Those with large areas of capillary non-perfusion. 2. Those with small areas of capillary non-perfusion. 3. Those with an intact c
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34. Blood rheology and proliferative retinopathy in sickle cell-haemoglobin C disease.
Haematological and rheological (plasma and serum viscosity, whole blood viscosity, and erythrocyte filterability) factors were studied in 31 age-sex matched pairs of patients with sickle cell haemoglobin C disease with and without proliferative sickle retinopathy (PSR). Patients with PSR had significantly higher mean cell haemoglobin and lower Hb F levels on
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35. Haemorrheological abnormalities in unstable angina pectoris: a relation independent of risk factor profile and angiographic severity.
Plasma viscosity, photometric erythrocyte aggregation index, and erythrocyte filterability were measured in 194 patients with coronary artery disease. Patients with unstable angina (n = 64) had a higher plasma viscosity and photometric erythrocyte aggregation index than patients with stable angina (95% confidence intervals for the mean difference: 0.052-0.10
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36. Rheological and fibrinolytic findings in multiple sclerosis.
Blood viscosity indices, fibrinolytic activity and other serum proteins related to haemocoagulation have been studied in 36 patients with multiple sclerosis. The whole blood viscosity was found to be increased in multiple sclerosis. The increase was caused by a decrease in erythrocyte deformability since plasma viscosity and haematocrit were normal. Plasmino