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Home > Patient & Family Resources > Health Library > D-Dimer Test
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A d-dimer test is a blood test that measures a substance that is released when a blood clot breaks up. Doctors order the d-dimer test, along with other lab tests and imaging scans, to help check for blood-clotting problems. A d-dimer test can also be used to check how well a treatment is working.
Doctors use the d-dimer test when a person might have a dangerous blood-clotting problem. These problems include:
No special preparation is required before having this test.
A health professional uses a needle to take a blood sample, usually from the arm.
When a blood sample is taken, you may feel nothing at all from the needle. Or you might feel a quick sting or pinch.
There is very little chance of having a problem from this test. When a blood sample is taken, a small bruise may form at the site.
Each lab has a different range for what's normal. Your lab report should show the range that your lab uses for each test. The normal range is just a guide. Your doctor will also look at your results based on your age, health, and other factors. A value that isn't in the normal range may still be normal for you.
Current as of:
August 31, 2020
Author: Healthwise StaffMedical Review: E. Gregory Thompson MD - Internal MedicineMartin J. Gabica MD - Family MedicineAdam Husney MD - Family Medicine
Current as of: August 31, 2020
Author: Healthwise Staff
Medical Review:E. Gregory Thompson MD - Internal Medicine & Martin J. Gabica MD - Family Medicine & Adam Husney MD - Family Medicine
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