A) Chilled test tube
B) Test tube containing heparin
C) Test tube containing sodium oxalate
D) Test tube containing calcium bicarbonate
Correct Answer: C
Solution :
Clotting of collected blood can be prevented by: Coating test tubes with silicon (which produce non-wettable surface similar in its smoothness to endothelial lining of blood vessel.) Adding chelating agents (includes trisodium citrate, sodium oxylate and sodium EDDTA) which remove calcium which is important for blood coagulation and prevent blood clotting. By adding heparin, most powerful anticoagulant which acts indirectly by activating plasma anti- thrombin III.You need to login to perform this action.
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