What is the role of prothrombin time (PT) and activated partial thromboplastin time (aPTT) in the evaluation of superficial thrombophlebitis?

Updated: Apr 17, 2019
  • Author: Khanjan H Nagarsheth, MD, MBA; Chief Editor: Vincent Lopez Rowe, MD  more...
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Answer

The prothrombin time (PT) and activated partial thromboplastin time (aPTT) are not useful in the diagnostic evaluation of patients with suspected superficial or deep thrombophlebitis. Most patients with thrombophlebitis have a normal PT and aPTT, and active thrombophlebitis is not uncommon in patients with a therapeutically elevated international normalized ratio (INR) due to warfarin therapy.


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