lab - bleeding time

Question 1

purpose of bleeding time

Answer 1

assesses plt function and ability of the body to produce clot after trauma

Question 2

3 methods in bleeding time

Answer 2

duke’s
ivy
template

Question 3

this method has standardized incision size

Answer 3

template method

Question 4

we are not conducting plt count if the patient’s plt is ___

Answer 4

<75,000 / ul

Question 5

principle of test

Answer 5

the use of sterile lancet, puncture in earlobe or forearm. Timer starts once the puncture starts and blot it every 30 seconds

Question 6

DUKE’S METHOD

Answer 6

1. Obtain a piece if filter paper and stopwatch.
2. Moisten a piece of cotton with 70% alcohol or povidone iodine and thoroughly cleanse the patient’s middle or ring finger.
3. Allow the skin to air dry.
    To avoid hemolysis and interfering of esults
4. Make a puncture wound 2-4 mm deep in the earlobe or finger with a disposable blood lancet.
5. Start the stopwatch immediately.
6. Be careful not to touch the puncture site. Blot the paper every 30 seconds, until the bleeding stops.
7. Record the bleeding time.

Question 7

how deep is the puncture in Duke’s method

Answer 7

2-4 mm deep

Question 8

ref range of duke

Answer 8

1-3 mns

Question 9

advantage of duke’s method

Answer 9

easy to do and convenient (no need of a sphygmomanometer)

Question 10

ref range of modified Ivy’s method

Answer 10

3-6 mns

Question 10

disadvantage of duke’s

Answer 10

inconsistent puncture site,
temperature
outdated

Question 10

ref range (borderline) of modified Ivy’s method

Answer 10

6-11 mns

Question 10

should be the blood flow more than 15
minutes. Discontinue the test and report
the test as “________

Answer 10

greater than 15 minutes

Question 10

area we prick for modified Ivy

Answer 10

volar surface of the arm

Question 10

pressure of sphymomanometer

Answer 10

40 mmhg

Question 10

dis of ivy

Answer 10

invasive
time consuming
increase risk of infection

Question 11

advantage of modified Ivy’s

Answer 11

standardized test because of the use of mmhg
sensitive compared to duke

Question 11

prolonged bleeding time

Answer 11

thrombocytopenia
glanzmann disorder
von Willebrand disease
vasculitis
plt function disorder
uremia
scurvy disease
Ehlers-Danlos
liver diease

Question 11

vascular disorder

Answer 11

vasculitis

Question 11

thrombocytopenia causes

Answer 11

aplastic anemia
increase consumption of plt (disseminated intravascular coagulation)
immune thrombocytopenic purpura

Question 11

thrombocytopenia plt amount

Answer 11

<150,000 plt/ul

Question 11

von willebrand disease
type

Answer 11

type 1 - mild
severe - type 3

Question 11

aspirin and NSAIDS effect

Answer 11

inhibits cyclooxygenase

Question 11

plt function disorder (normal amount of plt)

e.g. bernard soulier disorder

problem in

Answer 11

gp IIb-IIIa

Question 11

plt function disorder

e.g. bernard soulier disorder

problem in

Answer 11

GP - 1B

Question 12

why uremia is added on prolonged bleeding?

Answer 12

kidney problems/toxins interferes with the bleeding time

Question 13

problem in collagen production

Answer 13

scurvy disease - vitamin C deficiency

Question 14

connective disease that targets vasuclar integrity - problem in collagen

Answer 14

Ehlers-Danlos

Question 15

clinical aapplication of bleeding time

Answer 15

as diagnostic tool
assessment for bleeding
, monitoring drug effect\
indication of disease severity

Question 16

not that significant and very rare

Answer 16

shortened bleeding time

Question 17

shortened bleeding time

Answer 17

polycythemia vera
essential thrombocythemia (thrombosis and bleeding risk)
hypercoagulable disease

Question 18

hypercoagulable disease causes

Answer 18

pregnancy
contraceptive use
thrombophilia