51. 一位80歲病人平時有接受口服抗凝固劑(warfarin)治療，目前因為右側股骨頭骨折要開刀。關於區域麻醉的部 分，下列敘述何者為非？
(A) The anticoagulant therapy must be stopped (ideally 4 to 5 days before the planned procedure) and the INR must be normalized before initiation of neuraxial block
(B) In patients receiving low-dose warfarin therapy during epidural analgesia, their INRshould be monitored on a daily basis
(C) Neurologic testing of sensory and motor function should be performed routinely during epidural analgesia for patients on warfarin therapy
(D) As thromboprophylaxis with warfarin is initiated, neuraxial catheters can be removed when the INR is 2