aPTT is done for assessing?: (A) Warfarin toxicity, (B) LMW heparin, (C) Heparin toxicity, (D) Extrinsic coagulation pathway defect
Answer is C. Ref: KD Tripathi, 7th ed. P 618-620PT (Prothrombin Time)aPTT (Activated Partial Thromboplastin Time)* Assess activity of extrinsic coagulation pathway.* Used when on warfarin treatment.* WePT: Warfarin for extrinsic; PT value assessed.* Assess activity of intrinsic coagulation pathway.* Used while on heparin treatment.* HINT: Heparin for intrinsic; aPTT value assessed.