Definition of aggregometer
: an instrument for measuring the aggregation of platelets in a sample of blood Finally, a clinically easy-to-use and accurate bedside platelet aggregometer may help deliver optimal antiplatelet therapy to our patients. — Steven P. Schulman, Journal of the American Medical Association, 20 Oct. 2004 ◆An aggregometer records the changes in the relative intensities of light passing through a sample of blood when it is treated with an agent (such as ADP or collagen) that acts to aggregate platelets.
aggregometry\ˌa-gri-ˈgä-mə-trē\ play noun The standard test of how readily platelets clump is called aggregometry. It is usually performed in a specialized laboratory and can take two to three hours. — Andrew Pollack, New York Times, 20 July 2004
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