Coagulation Course 2024 BCHBD
Quiz by Sadeq K. Ali Al-Salait
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- Q1
What is the main actor in primaryhemostasis?
Blood vessels
Factor VIII
Fibrinogen
Platelets
30s - Q2
What is the most common cause of bleedingtendency?
Thrombocytopenia
HemophiliaA
VonWillebrand Disease (VWD)
Thrombocytosis
30s - Q3
What is the trigger of the extrinsicpathway of coagulation process?
Activationof thrombin
Activation of factor IX
Tissue factor release
Platelet activation
30s - Q4
The most common cause of errors in coagulation tests is …
Export of results
Faulty technique
Improper device or machine
Pre-analytic factors
30s - Q5
If the patient has hematocrit above 60%,we need to ….
Increase the amount of blood added to sampling tube
Do not thing
Increase the amount of anticoagulant added to sampling tube
Reduce the amount of blood added to sampling tube
30s - Q6
The best protocol to obtain plasma for coagulation study is …
2000g x 15 min
1000g x 5 min
2000g x 10 min
3000g x 15 min
30s - Q7
How’d you store the sample sent forcoagulation study if you’re not going to do it immediately?
At RT for aPTT and at 2-8 Celsius for PT
At 2-8 Celsius for PT
At RT for PT
At2-8 Celsius for all studies
30s - Q8
After preparation, PT reagent is stable for…
5-7days in the fridge
Until expiry date
A.6hours at 37◦C
2hours in the fridge
30s - Q9
A sample sent for coagulation study would be rejected if …
It came after 15 min. after sampling
Itis apparently hemolyzed
Itis not in cold box
Itis lipemic
30s - Q10
PT is important to evaluate …
Factor VII activity
Treatment with oral anticoagulant
Common pathway activity
All are true
30s - Q11
PTT is important to evaluate
Intrinsic pathway factors
Platelet function
Oral anti-coagulant activity
Primary hemostasis
30s - Q12
INR
International normal range
State a normal range for PT
Used to monitor heparin therapy
Used to achieve inter-laboratory harmony in PT results
30s - Q13
Fibrinogen assay by Clauss method…
Immunogenic assay of fibrinogen level
none is ture
Can detect hypo- and dys-fibrinogenemia
Is not required if we do thrombin time (TT)
30s - Q14
First-line hemostatic investigation include the following except…
Mixing study
PT
Platelet count
PTT
30s - Q15
Normal first line investigation with clinical bleeding may suggest…
Platelet function disorder.
Factor XIII deficiency
all are true
Mild VWD.
30s