PTT (Partial Thromboplastin Time)


  • Blood

  • 25-39 sec.

  • To measure the time needed for a clot to form
  • To help identify deficiencies of coagulation
  • To monitor the effect of heparin therapy

  • Execss administration of heparin
  • Abnormality of the coagulation system
  • Disseminated intravascular coagulation (DIC)
  • Liver failure with Vitamin K Deficiency

  • Hypercoagulable states

  • Hemolysis
  • Inadequate blood sample
  • Prolonged delay before analysis is performed