HARR_2.1 Coagulation and Fibrinolytic Systems/Reagents and Methods

Question 1

Which of the following initiates in vivo coagulation by activation of factor VII?

A. Protein C
B. Tissue factor (TF)
C. Plasmin activator
D. Thrombomodulin (TM)

Answer 1

Tissue factor (TF)

Question 2

Which of the following clotting factors plays a role in clot formation in vitro, but not in vivo?
A. Factor VIIa
B. Factor IIa
C. Factor XIIa
D. Factor Xa

Answer 2

Factor XIIa

Question 3

The anticoagulant of choice for most routine coagulation studies is:

A. Sodium oxalate
B. Sodium citrate
C. Heparin
D. Ethylenediaminetetraacetic acid (EDTA)

Answer 3

Sodium citrate

Question 4

Which anticoagulant:blood ratio is correct for coagulation procedures?

A. 1:4
B. 1:5
C. 1:9
D. 1:10

Answer 4

1:9