Pt. on warfarin about to do endo surgery for him which of the following is more important:
A. PT ***
B. PTT
■ Heparin: ↑ PTT, affects the intrinsic pathway and ↓ fibrinogen levels; safe in pregnancy.
■ Warfarin: ↑ PT, affects the extrinsic pathway, and ↓ vitamin K; teratogenic.