Individuals’ bleeding time measurements (in minutes) plotted against their respective platelet counts. As the straight vertical and diagonal lines show,

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Bleeding time is a medical test done on someone to assess their platelet function, count and integrity of the blood vessels.

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Copyright © 2004 The McGraw-Hill Companies, Inc. All rights reserved.

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Copyright © 2004 The McGraw-Hill Companies, Inc. All rights reserved.

Copyright © 2004 The McGraw-Hill Companies, Inc. All rights reserved.

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Presentation transcript:

Individuals’ bleeding time measurements (in minutes) plotted against their respective platelet counts. As the straight vertical and diagonal lines show, in those with normal platelet function, the bleeding time is not prolonged unless the platelet count is less than 100,000 per microliter. Individuals with immune thrombocytopenic purpura (ITP; solid blue circles) often have normal bleeding times despite very low platelet counts. Individuals with qualitative platelet defects, due to aspirin, uremia, or von Willebrand disease, have normal platelet counts but prolonged bleeding times. Source: Overview of Hemostasis, Pathophysiology of Blood Disorders, 2e Citation: Aster JC, Bunn H. Pathophysiology of Blood Disorders, 2e; 2017 Available at: https://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/1900/pathblood2_ch13_f007.png&sec=137395284&BookID=1900&ChapterSecID=137395249&imagename= Accessed: December 03, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved