Proctoscope

n. device used for viewing inside the rectum; device for viewing the large intestines

Proctoscopy is a common medical procedure in which an instrument called a proctoscope (also known as a rectoscope) is used to examine the anal cavity, rectum or sigmoid colon. A proctoscope is a short (10in or 25 cm long), straight, rigid, hollow metal tube, and usually has a small light bulb mounted at the end. During proctoscopy, the proctoscope is lubricated and inserted into the rectum, and then the obturator is removed, allowing an unubstructed view of the interior of the rectal cavity. This procedure is normally done to inspect for hemorrhoids or rectal polyps and might be mildly uncomfortable as the proctoscope is inserted further into the rectum. Modern fibre-optic proctoscopes allow more extensive observation with less discomfort.
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Proctoscope /proc·to·scope/ a speculum or tubular instrument with illumination for inspecting the rectum. proc·to·scope n. [more]Proctoscope - Community and Resources

Noun
1. an endoscope for examining the rectum
(hypernym) endoscope

n. proctoscope, device used for viewing inside the rectum; device for viewing the large intestines