Which values on partial thromboplastin time (PTT) or activated partial thromboplastin time (aPTT) should prompt a clinical alert?

Updated: Jul 30, 2019
  • Author: Muhammad Bader Hammami, MD; Chief Editor: Eric B Staros, MD  more...
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Answer

Answer

Critical values that should prompt a clinical alert are as follows:

  • aPTT: More than 70 seconds (signifies spontaneous bleeding)

  • PTT: More than 100 seconds (signifies spontaneous bleeding)


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