What procedure allows visualization of the rectal lumens via a flexible scope?
a. Colonoscopy
b. Gastroscopy
c. Bronchoscopy
d. Sigmoidoscopy
ANS: D
Sigmoidoscopy is direct visual inspection of the sigmoid and rectal lumens by means of a flexible fiberoptic or rigid lighted sigmoidoscope. The flexible scope is more comfortable for the patient and gives the surgeon better visualization of the mucosal surface to evaluate the left colon and rectosigmoid.
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