Hemorrhoidectomy
Risks for any anesthesia are:
Feldman M, Friedman LS, Sleisenger MH, eds. Sleisenger & Fordtran’s Gastrointestinal and Liver Disease. 8th ed. Philadelphia, Pa: WB Saunders; 2006.
Rakel P, ed. Conn’s Current Therapy 2007. 59th ed. Philadelphia, Pa: WB Saunders; 2007.