A partial thromboplastin time test tells you how long it takes your blood to clot. ... What’s normal varies with different labs, ... and your aPTT to be 60 to 80 seconds.

Initial laboratory testing was within normal limits except for a prolonged activated partial thromboplastin time (aPTT) of 51 seconds (reference range, 23-29 seconds) and thrombocytopenia ...

CLSI Publishes Guideline for One-Stage Prothrombin Time (PT) Test and Activated Partial Thromboplastin Time (APTT) Test June 09, 2008 08:30 AM Eastern Daylight Time ...

The abbreviation aPTT denotes activated partial-thromboplastin time, CI confidence interval, DRVVT dilute Russell’s viper-venom time, LA lupus anticoagulant, and PT prothrombin time.

Factor deficiency or inhibition. The possible causes of the isolated prolonged aPTT in this case include factor deficiencies and factor inhibitors. Prolongation of both the PT and aPTT suggests ...