Activated Partial Thromboplastin Time (aPTT Test)
A PTT test is done when bleeding abnormalities are found in the human body, whether internal or external.
Note: Read test details, FAQs and test conditions before proceeding to booking.
In a partial thromboplastin time, PTT test measures how long it takes for a clot to form in a blood sample. A clot is a thick lump of blood that the body produces to seal leaks, wounds, cuts, and scratches and prevent excessive bleeding. If it takes an abnormally long time for the blood to clot, it can show a problem with one or more of several clotting factors.
This may be a sign of a missing, deficient, or defective clotting factor or factor sliver disease (because many clotting factors are made in the liver) treatment with heparin, a blood-thinning medication.
What is the partial thromboplastin time test?
Activated Partial Thromboplastin Time Test is a screening test used to determine the overall integrity of the intrinsic/common coagulation pathway. The APTT test assesses the coagulation factors in the intrinsic and common procoagulant pathway but, not the extrinsic procoagulant pathway that includes factor VII, tissue factor and factor XIII (fibrin stabilizing factor).
Earlier activated partial thromboplastin time was also used to monitor patients on Heparin therapy but, since November 2016, it has been advised to not use this test as the primary method of heparin monitoring and for this purpose the heparin anti–Xa assay HEPTP has been advised.
The APPT test can be used in the following cases;
- Screening for certain coagulation factor deficiencies.
- Detection of coagulation inhibitors.
What is the difference between PT and APTT test?
Both Partial Thromboplastin Time (PTT) and Activated Partial Thromboplastin Time tests (APTT) are used for the testing of the same thing, the only difference is that in APTT an activator is added to speed up the clotting time and this results in a narrower reference range. The APTT can be said to be the sensitive version of PTT Test.
The activated partial thromboplastin time normal range is between 30 to 40 seconds, while the partial thromboplastin time normal range is between 60 to 70 seconds.
Why the APTT Test Do?
A Partial Thromboplastin Time test measures the time taken for blood to clot in the human body to identify whether the blood is clotting normally. PTT lab test also identifies low levels of blood clotting factors.
Activated Partial Thromboplastin Time Test (APTT Test) conditions;
- Overnight fasting is not required
- Doctor’s prescription may be needed
- The test result may vary depending on age, sex and health history, etc.
- Inform your doctor if you’ve been taking blood-thinning medicines or drugs, after which, he might ask you to stop. Certain medications can also increase the platelet count.
- In case you are on warfarin or heparin, take the test before your day’s dose.
- Home visit service facility available only for total test cost of above ₹999.00
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