What is the role of routine blood tests for diagnosing lower gastrointestinal (GI) bleeding?

Updated: Jul 26, 2019
  • Author: Burt Cagir, MD, FACS; Chief Editor: BS Anand, MD  more...
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Appropriate routine blood tests include the following:

  • Complete blood cell (CBC) count

  • Serum electrolytes levels (eg, sequential multiple analysis 7 [SMA7])

  • Coagulation profile, including activated partial thromboplastin time (aPTT), prothrombin time (PT), platelet count, and/or bleeding time (bleeding time is only recommended in patients with bleeding disorders and in those using antiplatelet agents)

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