why bleeding time is less than clotting time

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Hemostasis occurs in a sequence:
1. Vasoconstriction
2. Formation of platelet plug
3. Formaion of clot

Bleeding time is the time from the onset of bleeding till the stoppage of bleeding i.e. temporary hemoststic plug formation (platelet plug). Clotting time is the time from the onset of bleeding till the clot formation (i.e. definitive hemostatic plug).

Hence, clotting time is longer then bleeding time.

answered Oct 5, 2012 by Sulabh Shrestha Doctor of Medicine (5,553 points)
selected Mar 15, 2014 by Jemesh Singh MaharJa
commented Feb 28, 2014 by yusuf rasty
thank you doctor

Bleeding time is a measure of platelet function whereas coagulation time/clotting time is a measure of the clotting factors. They're different components of the blood which we need for effective hemostatis.

answered Feb 28, 2014 by anonymous