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Techniques for determining the time interval required for hemostasis to occur after a standardized wound has been made in the capillary bed.
| Dental Dictionary: bleeding time test |
Techniques for determining the time interval required for hemostasis to occur after a standardized wound has been made in the capillary bed.
| 5min Related Video: Bleeding Time Test |
| Medical Test: Bleeding Time Test |
| Where It's Done | Who Does It | How Long It Takes | Discomfort/Pain |
| Hospital room or outpatient clinic. | Medical technologist. | 15-20 minutes. | Discomfort at incision or puncture site. |
| Results Ready When | Special Equipment | Risks/Complications | Average Cost |
| 15 minutes to 2 hours. | Lancet, blood pressure cuff, and filter paper. | Possible formation of scar tissue. | $ |
Duke, Ivy, Mielke, simplate, or template bleeding time tests.
PurposeTo test for a bleeding problem.
How it worksSurface bleeding is induced, and the time from initial blood flow until clotting is measured.
PreparationYou must not take aspirin for 10 days before the test.
Test procedureThe test sites are cleaned and bandaged. You return to normal activities.
Factors affecting resultsThe normal bleeding time range is two to seven minutes (shorter in men than in women and shorter in people over 50). A longer time can indicate a disorder involving platelets or fibrinogen (a protein required for clot formation). Blood vessel diseases (scurvy) also produce an increased bleeding time.
AdvantagesIt's a quick procedure that provides immediate results.
DisadvantagesAbout 20 different medications, including antihistamines and nonsteroidal anti-inflammatory drugs such as aspirin and ibuprofen, impair the platelets' ability to stick to wounds, and therefore produce a longer bleeding time. Ask your doctor for a list of these drugs, which should be discontinued one week before the test.
Bleeding time is shorter in men than in women by an average of about 30 seconds. This is probably because men have slightly more red blood cells than do women, and the higher the red cell count, the more efficient the platelets.
| Bleeding Time: Purpose | |
| Bleeding Time: Precautions | |
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Copyrights:
![]() | Dental Dictionary. Mosby's Dental Dictionary. Copyright © 2004 by Elsevier, Inc. All rights reserved. Read more | |
![]() | Medical Test. The Patient's Guide to Medical Tests by Faculty Members at The Yale University of Medicine and G.S. Sharpe Communications, Inc. Copyright © 1997 by Yale University of Medicine and G.S. Sharpe Communications, Inc. Published by Houghton Mifflin Company. All rights reserved. Read more |