hyperviscosity

hyperviscosity /hy·per·vis·cos·i·ty/ (-vis-kos´ĭ-te) excessive viscosity, as of the blood.

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Hyperviscosity

Thick, viscous blood, caused by the accumulation of large proteins, such as immunoglobulins, in the serum.

Mentioned in: Multiple Myeloma, Waldenström's Macroglobulinemia

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hyperviscosity

[-viskos′itē]

Etymology: Gk, hyper, excess; L, viscosus, sticky

extreme viscosity or thickness of fluid.

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hyperviscosity [hi″per-vis-kos´ĭ-te]

excessive viscosity, as of the blood.

hyperviscosity syndrome any of various syndromes associated with increased viscosity of the blood. One type is due to serum hyperviscosity and is characterized by spontaneous bleeding with neurologic and ocular disorders. Another type is characterized by polycythemia with retarded blood flow, organ congestion, reduced capillary perfusion, and increased cardiac effort. A third group includes conditions in which the deformability of erythrocytes is impaired, such as sickle cell anemia.

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hyperviscosity

excessive viscosity, as of the blood.

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hyperviscosity syndrome

increased viscosity of the blood occurs with IgM and IgA myelomas because of the high levels of macroglobulins; causes increased resistance to blood, hypoxia, organ failure, retinal lesions, abnormalities in platelet function, coagulation defects and cardiac failure.