Partial Thromboplastin Time (PTT) Lab Values
Sep 18, 2023•3 min
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Episode description
Normal 25 - 35 seconds
Indications
- Detection of coagulation disorders
- Evaluate response to Heparin (PT for Coumadin)
- Preoperative assessment
Description
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 would cause increased levels?
- Disseminated Intravascular Coagulation (DIC)
- Clotting Factor Deficiencies:
- Hypofibrinogenemia
- Von Willebrand Disease
- Hemophilia
- Liver disease:
- Cirrhosis
- Vitamin K deficiency
- Polycythemia
- Dialysis
What would cause decreased levels?
- N/A
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