[M1] Bleeding time Flashcards
The first response of the body following blood vessel injury.
Primary hemostasis
The ________ and the ______________ are the main players in their stage to prevent undue loss of blood.
platelets
vascular responses
Three stages in primary hemostasis
Platelet adhesion
Platelet activation
Platelet aggregation
There are three stages involved in primary hemostasis and these are: platelet adhesion, platelet activation and platelet aggregation which result in the formation of ______________________
platelet/hemostatic plug.
The interval required for the blood to stop flowing from a skin incision.
Bleeding time
The interval required for the blood to stop flowing from a skin incision.
Bleeding time
T/F: Bleeding time is necessarily parallel to the coagulation time of the blood.
False; Bleeding time does NOT necessarily parallel the coagulation time of the blood.
It measures the ability of blood vessels to control bleeding injury by formation of platelet plug or hemostatic plug.
Bleeding time
It tests the function of platelets as well
Bleeding time
Materials used for bleeding time
70% isopropyl alcohol
Cotton
Blood lancet
Filter Paper
Timer
Method used in Bleeding Time
Duke’s Method
Modified Ivy’s Method
Copley-Lalitch Method
The Lobe of the ear is the site of choice for puncture.
Duke’s Method
T/F: in Duke’s method, warming the site is NOT required before taking the bleeding time
FALSE; It should be warmed before the test or before incision is made. Then take bleeding time.
DUKE’S METHOD
Procedure:
1. Clean the site for puncture (_____ or _______________) with cotton moistened with alcohol. Allow it to dry.
finger
lobe of the ear
DUKE’S METHOD
Procedure
2. Puncture the lower edge of the ear lobe to a depth of ______. Wipe off the first drop with dry cotton and start the stopwatch as soon as blood appears.
3mm
DUKE’S METHOD
Procedure
3. At _________ intervals, apply gently to the drop of blood, taking care not to touch the skin. Endpoint is reached when no more blood is absorbed by the ____________.
half-minute
filter paper
Duke’s method reference range
2-4 minutes
Duke’s method
however, normal persons may occasionally give up values up to ____________
5 minutes
Capillary pressure is standardized and the average of bleeding time from three separate incisions in the forearm is noted. This provides a very accurate technique if the incisions are identical.
Modified Ivy’s Method
MODIFIED IVY’S METHOD
Procedure
1. A sphygmomanometer cuff is placed around the patient’s upper arm. The pressure is raised to ____________ and maintained at this level for the duration of the test.
40mmHg
MODIFIED IVY’S METHOD
Procedure
2. Sterilize the site of puncture. Using a sterile lancet, make a puncture wound, ____ deep along the flexor (______________) aspect of the forearm, avoiding any visible vein or skin lesions.
3mm
inner/volar surface
MODIFIED IVY’S METHOD
Procedure
3. Start the stopwatch. At ________ intervals, gently blot the blood with filter paper until no more blood appears on the filter paper, taking care not to touch the skin. Note the time.
half-minute
MODIFIED IVY’S METHOD
Procedure
4. The blood pressure cuff is ____________
decompressed.
MODIFIED IVY’S METHOD
Procedure
5. Repeat the test (the above procedure) at ___________ intervals until there are ___________ of bleeding time.
5 minute
3 recordings
