Best test that shows the integrity of intrinsic pathway of clotting mechanism
(A) bleeding time (B) aPTT (C) prothrombin time (D) clotting time
(B) Answer- B (aPTT)The aPTT measures the time necessary to generate fibrin from initiation of the intrinsic pathway.PTT measures the integrity of the intrinsic system (Factors XII, XI, VIII, IX) and common clotting pathways.