INDICATION:  , Rectal bleeding.,PREMEDICATION:, See procedure nurse NCS form.,PROCEDURE:  ,gastroenterology, rectal bleeding, digital rectal exam, pentax video, anal verge, angiodysplasia, colonic mucosa, diverticula, endoscope, flexible, flexible sigmoidoscopy, hemorrhoids, masses, polyps, rectum, sigmoidoscopy, sphincter tone, internal hemorrhoids, bleeding, rectal 