Epidural anesthesia using a 0,75% ropivacaine and subarachnoid anesthesia with a 0,5% bupivacaine associated or not with clonidine in hemorrhoidectomies.

Purpose: To study the safety and efficiency of two anesthetic blockages in hemorrhoidectomy and the effect of clonidine on analgesia.

Methods: 80 patients were studied, randomly divided into four groups: l (n=19)- peridural with a 0,75% ropivacaine; 2 (n=21)-peridural with a 0,75% ropivacaine and 150 microg of clonidine; 3 (n=19)- subarachnoid with a 0,5% bupivacaine; 4 (n=21)- subarachnoid with a 0,5% bupivacaine and 50 microg of clonidine. The intensity of pain was evaluated by the visual analogical scale 8, 12 and 24 hours after surgery.