ReferencesĬhandler WL and Schmer G, Evaluation of a new dynamic viscometer for measuring the viscosity of whole blood and plasma, Clin Chem (1986) 32:505. Hyperviscosity syndrome can also occur in multiple myeloma patients, and, rarely, in patients with rheumatoid factors and other aggregating proteins. The effective viscosity of whole blood increases mainly due to the red blood cells, which have a volume fraction about 40 or above. The most common cause of serum hyperviscosity is the presence of large concentrations of IgM monoclonal proteins, and Waldenstrom's macroglobulinemia accounts for 80% to 90% of symptomatic hyperviscosity cases. Although viscosities >1.6 are abnormal, hyperviscosity syndromes are rarely present unless the relative viscosity is >4.0 (approximately). Results are reported as a relative viscosity to water, where normal serum and plasma have a relative viscosity of up to 1.6. Serum, plasma or whole blood viscosity measurements can be useful in patients with hyperviscosity syndromes due to multiple myeloma or Waldenstrom's macroglobulinemia. Although blood viscosity varies in relation to shear rate, hematocrit, and temperature, equipment is now available with which it may be measured in respect. Viscosity test cost max is in RequestATest (Viscosity. Normal values are usually between 1.6 and 1.9. Viscosity is the property of fluids to resist flow. None Viscosity test cost minimal is in LifeExtension (Viscosity, serum Blood Test) with price 36.00. In adults, hyperviscosity syndrome typically causes symptoms when blood viscosity is between 6 and 7, measured relative to saline, but it can be lower. Lab Name Viscosity, Serum Lab Code SRVISG Epic Ordering
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