Sigmoidoscopy (Flexible Sigmoidoscopy)
How To Prepare For A Sigmoidoscopy
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To prepare for a flexible sigmoidoscopy, one or more enemas are performed about 2 hours before the procedure to remove all solids from the sigmoid colon. An enema is performed by flushing water, laxative, or sometimes a mild soap solution into the anus using a special wash bottle.
In some cases, the entire gastrointestinal tract must be emptied by following a clear liquid diet for 1 to 3 days before the procedure—similar to the preparation for colonoscopy. Patients should not drink beverages containing red or purple dye. For information about what is, and what is not, a clear liquid diet, click here.
A laxative or an enema may also be required the night before a flexible sigmoidoscopy. A laxative is medicine that loosens stool and increases bowel movements. Laxatives are usually swallowed in pill form or as a powder dissolved in water.
Patients should inform their doctor of all medical conditions and any medications, vitamins, or supplements taken regularly, including:
- Aspirin
- Arthritis medications
- Blood thinners
- Diabetes medications
- Vitamins that contain iron
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