Lab

Partial Thromboplastin Time

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Partial Thromboplastin Time, PTT

  • Normal
  1. Range: 25-41 sec
  • Increased
  1. Heparin
  2. Warfarin (Coumadin)
  3. Thrombolytics
  4. Clotting Factor deficiency
    1. Factor I Deficiency
    2. Factor II Deficiency
    3. Factor V Deficiency
    4. Factor VIII Deficiency (Hemophilia A)
    5. Factor IX Deficiency (Hemophilia B)
    6. Factor X Deficiency
    7. Factor XI Deficiency
    8. Factor XII Deficiency
  5. Liver disease
  6. Vitamin K Deficiency
  7. Disseminated Intravascular Coagulation (DIC)
  8. Circulating Anticoagulants or specific factor inhibitor
    1. Penicillin reaction
    2. Rheumatoid Factor