Test Results & Interpretations
Overview of Activated Partial Thromboplastin Time
aPTT is a test done to assess clotting disorders of blood and usually done along with Partial Thromboplastin time (PTT) and INR. The test calculates the time in which your blood clots. It is a test used to evaluate coagulation factors like XII, XI, IX, VIII, X, V , prothrombin and fibrinogen. This test is usually ordered if you have symptoms of unexplained bleeding, inappropriate blood clotting, or recurrent miscarriages; when you are on heparin anticoagulant therapy for monitoring purposes; and also many times routinely as a part of pre surgical screen.
Why Get Tested
- If you have symptoms of unexpanied bleeding, inappropriate blood clotting, or recurrent miscarriages
- If you are on heparin anti coagolant therapy for monitoring purposes
- If you have/had recurrent miscarriages
- As part of routine check up before any surgery
- If you have a liver disorder
- No special preparation required
What Results of Activated Partial Thromboplastin Time mean?
- Prolonged PTT may be seen in Haemophilia A and B, Von Willibrand's disease, vitamin K deficiency, severe liver disease
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