Increased blood viscosity is an indicator for potential stroke and heart attack induced by a low flow of blood in the capillaries leading to an inadequate delivery of vital oxygen and nutrients to body tissues. The serum viscosity test is used to monitor patients and assess hyperviscosity syndrome including polycythemia, macroglobulinemia, multiple myeloma, and leukaemia. Plasma hyperviscosity is a known risk-factor for thrombosis and can be caused by increased levels of plasma proteins, such as fibrinogen or immunoglobulins. The plasma viscosity test looks for abnormal concentrations of proteins in the blood plasma and is highly regarded as an important aid to diagnosis for a range of conditions, such as rheumatoid arthritis, myeloma and Waldenstrom macroglobuinaemia. The clinical viscosity test measures the thickness or resistance to flow of biological fluids, enabling clinicians to identify where a patient’s viscosity values are not within the recognised normal range. They are in use in UK NHS, Ireland and USA pathology laboratories. Benson Viscometers designs and manufactures clinical viscometers to measure the viscosity (or thickness) of bodily fluids, notably blood plasma, serum, blood and synovial fluid.
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