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Questions and Answers
What is the purpose of measuring bleeding time using Duke's method?
What is the normal range for bleeding time using Duke's method?
In the bleeding time procedure, why should you avoid touching the finger while wiping the blood drop?
Which of the following is a step in the clotting time procedure?
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What is the normal range for clotting time?
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What should be done at 30-second intervals during the clotting time procedure?
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How do you determine the bleeding time using Duke's method?
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What indicates the cessation of bleeding in the bleeding time test?
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In the clotting time test, how is the clotting time calculated?
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Study Notes
Bleeding Time (Duke's Method)
- Measures the primary phase of hemostasis, specifically the interaction between platelets and the hemostatic plug.
- Normal value: 1-3 minutes.
- Used to detect platelet and vascular abnormalities.
Procedure for Bleeding Time
- Clean finger tip with alcohol and dry with cotton.
- Puncture finger with a lancet and record the time.
- Wipe away blood drop with filter paper at 15-second intervals without touching the finger.
- Continue until no more blood stains appear on the filter paper.
- Count the number of spots and divide by 4 to obtain bleeding time in minutes.
Clotting Time
- Time required for blood clot formation.
- Normal range: 5-8 minutes.
Procedure for Clotting Time
- Clean finger tip with alcohol and dry with a piece of cotton.
- Puncture finger with a lancet and obtain a large drop of blood.
- Note the time when the drop appears.
- Draw blood into a non-heparinized capillary tube at 30-second intervals.
- Break off a small piece of the capillary tube (0.5 cm) every 30 seconds until clotting occurs (indicated by a fine fibrin thread).
- Note the time when clotting appears.
- Divide the number of pieces by 2 to obtain clotting time in minutes.
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Description
Test your knowledge of bleeding time, a measurement of the primary phase of hemostasis, and its normal values, procedures, and uses in detecting platelet and vascular abnormalities.
