Bleeding Time Practical PDF
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Tanta University Faculty of Medicine
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Summary
This document describes a practical about bleeding time, including its definition, principle, materials, and method. The practical involves sterilising a part of the body, pricking it with a sterile pin, and wiping the oozing blood with filter paper every 15-30 seconds until bleeding stops. The bleeding time is recorded from pricking to the complete stoppage of bleeding.
Full Transcript
1.definition: It is the time needed for stoppage of bleeding from small blood vessels without formation of blood clot. 2.principle: When clot formation is prevented, stoppage of bleeding occurs by v.c. &platelet plug formation (both require normal platelets). (haemostatic mechanism other than blood...
1.definition: It is the time needed for stoppage of bleeding from small blood vessels without formation of blood clot. 2.principle: When clot formation is prevented, stoppage of bleeding occurs by v.c. &platelet plug formation (both require normal platelets). (haemostatic mechanism other than blood clotting). 3.Materials & method: a)Materials: -70%alcohol -sterile pin or lancet -filter paper. b)Method (Steps): -sterilize the thumb or ear lobule, prick it with sterile pin & record the time at pricking. -wipe the oozing blood by filter paper every 15-30 sec. without touching the skin till bleeding stops & record the time at stoppage. -bleeding time is the time from pricking to stoppage of bleeding.
