Partial Thromboplastin Time (PTT), Plasma


Used to evaluate intrinsic coagulation system and monitor heparin therapy. It is also used to detect classical haemophilia-A, dysfibrinogenaemia, vitamin K deficiency and Christmas disease.


PTT is prolonged with DIC, lupus anticoagulant, liver failure, vitamin K deficiency, congenital deficiency of Fitzgerald factor and congenital deficiencies of factors II, V, VIII, IX, X, XI, and XII.

Sample Type, Quantity & Conditions

2 ml Citrated Plasma Room Temperature

Special Precautions

Separate plasma from cells as soon as possible and freeze for transport. Avoid clotted, haemolysed or serum samples.

Normal Range

26.0 - 35.0 Seconds

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