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Subject: Viscosity, Serum
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Blood viscosity is a measure of the resistance of blood to flow due to any stress. Changes in the concentration of one or more blood protein fractions will result in a change in viscosity. Blood or serum viscosity can, therefore, be used both as a diagnostic tool for the presence of diseases known to alter the proteins and as a measure of the extent of the condition.
Normal range: 1.10–1.80 cP (relative to water).
Evaluate hyperviscosity syndrome associated with monoclonal gammopathy states (myeloma, Waldenström macroglobulinemia, and other dysproteinemias), including RA, SLE, and hyperfibrinogenemia.
Increased leukocyte count
Hyperglobulinemia associated with cirrhosis
Chronic active hepatitis
Acute thermal burns
No clinical significance
Whole blood measurement is of limited use because of differences in shear rates between instrumentation and in vivo conditions.
Clinical symptoms do not correlate well with test results.