[Ambulatory anorectal surgery under local anesthesia: analysis of 351 procedures]

Three hundred and twenty-eight patients with anorectal diseases were submitted ambulatory surgery, under local anesthesia, in a three-year period. Three hundred and fifty one operations were performed in outpatient service. Local anesthesia by Hook-Needle Puncture technique was used in 37 operations and the rest of them by classical technique through infiltration of both lateral anal quadrants. Hemorrhoids, fistulas, fissures and pilonidal cysts were the most frequent diseases treated (71.6%). The incidence of early and late complications was 19.6% and 4.8%, respectively. The most common complication was severe pain (16.1%). Five patients (1.5%) required hospitalization due postoperative complications. The surgery on an outpatient basis was a well-accepted procedure for two hundred eighty-eight patients (88%). The main benefit reported by patients was the possibility of recovery at home, which is more comfortable. The ambulatory anorectal surgery under local anesthesia is a safe and effective method, with the additional advantage of the costs saved and increase of available beds for more complex surgery.