PT, PTT, APTT

Prothrombin Time (PT)

   11 – 16 seconds (Normal)

   1.5 – 2.5 times normal or control (Coumadin)

Partial Thromboplastin Time (PTT)

   60 – 70 seconds (Normal)

   2 – 2.5 times normal or control

Activated Partial Thromboplastin Time (APTT)

   30 – 45 seconds (Normal)

   2 – 2.5 times normal or control (Heparin)