Study With Me : Introduction to Blood Transfusion 36
SECTION 1 : Haematology
Questions and Answers
What are the two pathways of the clotting cascade in blood coagulation?
Answer: The two pathways of the clotting cascade are the tissue factor pathway and the contact activation pathway, both converging into a common pathway where clotting factor X, thrombin, and fibrin are activated.
What does a Roman numeral followed by 'a' indicate in the clotting cascade?
Answer: In the clotting cascade, a Roman numeral followed by 'a' signifies that the clotting factor has been activated.
How stable are clotting factors in stored blood, except for FV, FVIII, and platelets?
Answer: Clotting factors in stored blood, except for FV, FVIII, and platelets, are relatively stable. Factor V and FVIII remain stable when frozen soon after collection to temperatures lower than –25°C.
For how long do platelet concentrates prepared from donated blood remain viable?
Answer: Platelet concentrates prepared from donated blood remain viable for 5 to 7 days under the correct storage conditions, including constant motion within a temperature range of 22°C ± 2°C.