#Blood viscosity full#

Acute phase and opsonin response in cardiac surgery patients: influence of underlying cardiac disease. Welters I, Menges T, Ballesteros M, Sablotzki A, GГ¶rlach G, Hempelmann G.Decrease in red blood cell deformability caused by hypothermia, hemodilution, and mechanical stress: factors related to cardiopulmonary bypass.

Kameneva MV, Undar A, Antaki JF, Watach MJ, Calhoon JH, Borovetz HS.Whole blood viscosity as a determinant of cardiac hypertrophy in systemic hypertension. Devereux RB, Drayer JI, Chien S, Pickering TG, Letcher RL, DeYoung JL, Sealey JE, Laragh JH.Effect of hematocrit on blood pressure via hyperviscosity. Prognostic significance of rheological and biochemical findings in patients with intermittent claudication. Dormandy JA, Hoare E, Khattab AH, Arrowsmith DE, Dormandy TL.

Impact of medical treatment on the outcome of patients after aneurysmal subarachnoid hemorrhage.

Vermeij FH, Hasan D, Bijvoet HW, Avezaat CJ.

The possible role of hemorheology in atherothrombogenesis. ICTH-Report-Subcommittee on Rheology of the International Committee on Thrombosis and Haemostasis. Rheological aspects of thrombosis and haemostasis: basic principles and applications. Cellular determinants of low-shear blood viscosity. Blood viscosity: influence of erythrocyte aggregation.

Chien S, Usami S, Dellenback RJ, Gregersen MI, Nanninga LB, Guest MM.

On the shear rate dependence of red cell aggregation in vitro.

Schmid-SchГ¶nbein H, Gaehtgens P, Hirsch H.

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#Blood viscosity full#

Full textДЇull text is available as a scanned copy of the original print version. Thus, because of its potential role in haemodynamics, thrombosis and inflammation, determination of whole blood viscosity could provide useful information for diagnostics and therapy of (cardio)vascular disease. Furthermore, as increased red blood cell aggregation is a reflection of inflammation, hyperviscosity has been shown to be a marker of inflammatory activity. Apart from the direct haemodynamic significance, an increase in blood viscosity at low shear by red blood cell aggregation is also associated with increased thrombotic risk, as has been demonstrated in atrial fibrillation. However, blood viscosity plays its most important role in the microcirculation where it contributes significantly to peripheral resistance and may cause sludging in the postcapillary venules. At the sites of severe atherosclerotic obstructions or at vasospastic locations, when change of vessel diameter is limited, blood viscosity contributes to stenotic resistance thereby jeopardising tissue perfusion. Other important determinants of blood viscosity are the haematocrit, the presence of macro-molecules in the medium, temperature and, especially at high shear, the deformability of red blood cells. At low shear, blood cells aggregate, which induces a sharp increase in viscosity, whereas at higher shear blood cells disaggregate, deform and align in the direction of flow. Turnaround for this test is typically 2-5 business days.Whole blood is a non-Newtonian fluid, which means that its viscosity depends on shear rate. Hyperviscosity is associated with a number of conditions includingВ WaldenstrГ¶m macroglobulinemia, multiple myeloma, leukemia, polycythemia, rheumatoid arthritis, sickle cell anemia, and other autoimmune disorders.ДЄ viscosity test may be ordered when a person has symptoms of hyperviscosity or has been diagnosed with a condition that is associated with hyperviscosity. Symptoms of hyperviscosity include abnormal bleeding, headache, blurred vision, vertigo, chest pain, loss of coordination, seizures, and coma. When blood viscosity increases it can cause a condition known as hyperviscosity.

Viscosity is determined in part by the amount of hematocrit, red blood cells, white blood cells, and proteins in the blood. Viscosity determines how well a person's blood flows through the veins which can affect how efficiently oxygen is transported to tissues and organs throughout the body as well as how much work is required by the heart to pump the blood. A simpler definition would be the thicknessВ of the blood. Viscosity is a measurement of the blood's resistance to flow.