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Partial Thromboplastin Time (PTT)

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What is the Lab Name for Partial Thromboplastin Time?

Partial Thromboplastin Time

What is the Lab Abbreviation for Partial Thromboplastin Time?


What is Partial Thromboplastin Time in terms of Nursing Labs?

Partial Thromboplastin Time (PTT)evaluates the function of factors I, II, V, VIII, IX, X, XI, and XII. PTT represents the amount of time required for a fibrin clot to form. Monitors therapeutic ranges for people taking Heparin.

What is the Normal Range for Partial Thromboplastin Time?

25 – 35 seconds

What are the Indications for Partial Thromboplastin Time?

  • Detection of coagulation disorders
  • Evaluate response to Heparin (PT for Coumadin)
  • Preoperative assessment

What would cause Increased Levels of Partial Thromboplastin Time?

  • Disseminated Intravascular Coagulation (DIC)
  • Clotting Factor Deficiencies:
    • Hypofibrinogenemia
    • Von Willebrand Disease
    • Hemophillia
  • Liver disease:
    • Cirrhosis
  • Vitamin K deficiency
  • Polycythemia
  • Dialysis

What would cause Decreased Levels of Partial Thromboplastin Time?


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