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Activated partial thromboplastin time

Authoring team

The activated partial thromboplastin time is equivalent to the Kaolin cephalin clotting time, and is a measure of the activity of the intrinsic pathway of coagulation (VIII, IX, XI, XII). The normal range is 30-45 seconds.

Reference

  1. Winter W et al. Coagulation Testing in the Core Laboratory. Laboratory Medicine, Volume 48, Issue 4, November 2017, Pages 295–313,

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