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Partial thromboplastin time

Partial thromboplastin time is a topic covered in the Guide to Diagnostic Tests.

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Partial thromboplastin time, activated, plasma (aPTT)

25–35 seconds


Panic: ≥60 seconds (off heparin)



Do not contaminate specimen with heparin.

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McPhee, Stephen J., et al. "Partial Thromboplastin Time." Guide to Diagnostic Tests, 7th ed., McGraw-Hill Education, 2017. Medicine Central, im.unboundmedicine.com/medicine/view/GDT/619249/all/Partial_thromboplastin_time.
McPhee SJ, Lu CM, Nicoll D. Partial thromboplastin time. Guide to Diagnostic Tests. 7th ed. McGraw-Hill Education; 2017. https://im.unboundmedicine.com/medicine/view/GDT/619249/all/Partial_thromboplastin_time. Accessed March 22, 2019.
McPhee, S. J., Lu, C. M., & Nicoll, D. (2017). Partial thromboplastin time. In Guide to Diagnostic Tests. Available from https://im.unboundmedicine.com/medicine/view/GDT/619249/all/Partial_thromboplastin_time
McPhee SJ, Lu CM, Nicoll D. Partial Thromboplastin Time [Internet]. In: Guide to Diagnostic Tests. McGraw-Hill Education; 2017. [cited 2019 March 22]. Available from: https://im.unboundmedicine.com/medicine/view/GDT/619249/all/Partial_thromboplastin_time.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC T1 - Partial thromboplastin time ID - 619249 A1 - McPhee,Stephen J, AU - Lu,Chuanyi Mark, AU - Nicoll,Diana, BT - Guide to Diagnostic Tests UR - https://im.unboundmedicine.com/medicine/view/GDT/619249/all/Partial_thromboplastin_time PB - McGraw-Hill Education ET - 7 DB - Medicine Central DP - Unbound Medicine ER -