Description
Serum, NA, Fasting or Non Fasting: As suggested by doctor
Sample Required:
Blood sample collected from a vein.
Test Time:
The test is usually performed within a few hours after the blood sample is collected.
Test Normal Range:
The normal range of APTT varies depending on the laboratory and the reagents used for the test. It is usually reported in seconds, with the reference range typically between 25 to 35 seconds.
What is the Test?
The APTT test measures the time it takes for blood to clot after certain clotting factors are activated. It is used to assess the integrity of the intrinsic and common coagulation pathways and to monitor the effects of anticoagulant medications like heparin.
Test Procedure:
A healthcare professional will draw a blood sample from a vein, typically from the arm. The blood is mixed with reagents that initiate the clotting process. The time it takes for the blood to form a clot is measured.
When to Take the Test:
The APTT test is ordered to monitor heparin therapy or investigate unexplained bleeding or clotting disorders.
Who Should Take This Test:
Individuals who are prescribed heparin therapy, those with suspected bleeding or clotting disorders, or individuals undergoing surgery or medical procedures that may affect blood clotting.
Precautions for Exceptional Cases (Pregnancy etc.):
Pregnant women or individuals with a history of bleeding disorders should inform their healthcare provider before taking this test.
FAQs:
Q1: Why is the APTT test important?
A: The APTT test helps assess the clotting function of the blood and can diagnose or monitor conditions such as hemophilia, von Willebrand disease, and the effects of heparin therapy.
Q2: How is the APTT test different from the PT/INR test?
A: While both tests assess blood clotting, the APTT primarily evaluates the intrinsic pathway and heparin therapy, while the PT/INR assesses the extrinsic pathway and the effects of warfarin therapy.
Q3: Can medications or medical conditions affect APTT results?
Yes, certain medications (especially anticoagulants) and medical conditions can influence APTT results. Your healthcare provider will consider these factors when interpreting the test.
Q4: Is fasting required for the APTT test?
A: Fasting is typically not required for the APTT test.
Q5: Can the APTT test diagnose clotting disorders in newborns?
A: Yes, the APTT test can help diagnose bleeding or clotting disorders in newborns, especially those born to mothers with a history of such disorders
