Thrombin Time Test
- Category
- Blood Clotting
- Sample
- Blood sample taken from a vein in your arm
- Reports () Terms & Conditions Report time varies with time of sample collection.
- In 2 days
- Fasting
- No Fasting
- Age
- 5+ Years
What Is This Test?
Thrombin Time measures how quickly fibrinogen converts to a clot when thrombin is added to plasma.
Why this test is performed?
Helps evaluate abnormal fibrinogen, detect the effect of heparin or direct thrombin inhibitors, and investigate unexplained prolonged clotting tests.
Who should take this test?
Easy bruising or bleeding, heavy periods, blood clots, before surgery, or people taking blood thinners.
Test Preparation
No fasting needed.
Medical disclaimer · for information only, not medical advice
This article is for general information and education only. It is not medical advice, does not create a doctor–patient relationship, and is not a substitute for consultation with a qualified doctor who has assessed your individual situation. Never delay seeking medical advice because of something you have read here.
In a medical emergency, call 112, or 108 for an ambulance where that service operates, or go to your nearest emergency department. If you are in mental health distress, Tele-MANAS is free and available 24×7 on 14416.
Read our Editorial Policy and Medical Review Process.
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Frequently asked questions
Yes — heparin and dabigatran prolong thrombin time. Tell the lab about any blood thinners.
No fasting is needed. You can eat and drink normally unless your doctor has advised otherwise.
Blood sample taken from a vein in your arm.
Usually within 15–39 hours after the sample reaches the lab. You will receive the report online.
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