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Blood clot test
Blood clot test


Bleeding time

Definition:

Bleeding time is a blood test that looks at how fast small blood vessels in the skin close to stop you from bleeding.



How the Test is Performed:

A blood pressure cuff is inflated around your upper arm. While the cuff is on your arm, the health care provider makes two small cuts on the lower arm. They are just deep enough to cause a tiny amount of bleeding.

The blood pressure cuff is immediately deflated. Blotting paper is touched to the cuts every 30 seconds until the bleeding stops. The health care provider records the time it takes for the cuts to stop bleeding.



How to Prepare for the Test:

Certain medications may change the test results. Always tell your doctor what medicines you are taking, even over-the-counter drugs. Drugs that may increase bleeding times include dextran, nonsteroidal anti-inflammatory drugs (NSAIDs), and salicylates (including aspirin).

Your doctor may tell you to stop taking certain medicines a few days before the test. Never stop taking medicine without first talking to your doctor.



How the Test will Feel:

The tiny cuts are very shallow. Most people say it feels like a skin scratch.



Why the Test is Performed:

This test helps diagnose bleeding problems.



Normal Results:

Bleeding normally stops within 1 to 9 minutes. However, values may vary from lab to lab.



What Abnormal Results Mean:

Longer-than-normal bleeding time may be due to:

Additional conditions under which the test may be performed:



Risks:

There is a very slight risk of infection where the skin is broken. Excessive bleeding is rare.



References:

Schmaier AH. Laboratory evaluation of hemostatic and thrombotic disorders. In: Hoffman R, Benz EJ Jr, Silberstein LE, Heslop HE, Weitz JI, eds. Hematology: Basic Principles and Practice. 6th ed. Philadelphia, PA: Saunders Elsevier;

Schafer A. Approach to the patient with bleeding and thrombosis In: Goldman L, Schafer AI, eds. Goldman's Cecil Medicine. 24th ed. Philadelphia, PA: Saunders Elsevier; 2011:chap 174.




Review Date: 3/3/2013
Reviewed By: Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, Bethanne Black, Stephanie Slon, and Nissi Wang.

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Atlantic Medical Group
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Morristown Medical Center

100 Madison Avenue
Morristown, NJ 07960
973-971-5000

Overlook Medical Center

99 Beauvoir Avenue
Summit, NJ 07901
908-522-2000

Newton Medical Center

175 High Street
Newton, NJ 07860
973-383-2121

Chilton Medical Center

97 West Parkway
Pompton Plains, NJ 07444
973-831-5000

Goryeb Children's Hospital

100 Madison Avenue
Morristown, NJ 07960
973-971-5000

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Atlantic Medical Group

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