Rigid Sigmoidoscopy
Rigid sigmoidoscopy may be useful in ano-rectal diseases such as bleeding per rectum or inflammatory rectal disease, particularly in the general practice and pediatrics.
For performing the examination, the patient must lie on the left side, in the so called Sim's position. The bowels are previously emptied with a suppository, and a digital rectal examination is first performed. The sigmoidoscope is lubricated and inserted with obturator in general direction of the navel. The direction is then changed and the obturator is removed so that the physician may penetrate further with direct vision. A bellows is used to insufflate air to distend the rectum. Lateral movements of the sigmoidoscope's tip negotiate the Houston valve and the recto-sigmoid junction.
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