Bleeding disorders
Laboratory approach

Topic Completed: 1 June 2012

Revised: 4 January 2019, last major update June 2012

Copyright: (c) 2002-2016,, Inc.

PubMed Search: Laboratory [title] bleeding disorders

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Cite this page: Parsons J. Laboratory approach. website. Accessed May 24th, 2020.
Definition / general
  • Laboratory tests should be ordered if:
    • History or physical exam is suspicious for bleeding disorder or
    • For routine preoperative testing (PT, PTT, platelet count)
  • See algorithms for prolonged PT, prolonged PTT, abnormal platelet count or hereditary bleeding disorder (PT, PTT, and platelet count normal)
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