[Two elements of value in anorectal surgery; exposure of the operative field by the Helfrick-Ferraz retractor and delayed anesthesia].
D001003:Anal Canal / Q000601:surgery*; D000758:Anesthesia; D000776:Anesthesiology; D013505:Digestive System Surgical Procedures; D006801:Humans; D007420:Intestine, Large; D012007:Rectum / Q000601:surgery*
ANUS/surgery; RECTUM/surgery
Dois elementos de valor na cirurgia ano-retal; a exposição do campo operatório pelo afastador Helfrick-Ferraz e a anestesia de demora.