Sigmoidoscopy (Anoscopy, Proctoscopy)

Anoscopy

Usually, no preparation is needed for an anoscopy.

Proctoscopy and sigmoidoscopy

Test preparation for a proctoscopy and sigmoidoscopy may be similar. Before the test:

• Talk with your doctor to find out if you need to stop taking some medicines, such as warfarin, before the test.
• Tell your doctor if you have been diagnosed with peritonitis, diverticulitis, or toxic megacolon or if you have had recent bowel surgery.

The preparation for these tests usually involves a thorough cleaning of the lower colon, because it must be completely clear of stool (feces). Even a small amount of fecal material can affect the accuracy of the test.

• You may be instructed to follow a liquid diet for 1 to 2 days before the test.
• You may be instructed to not eat for up to 12 hours before the test.
• You may need to have an enema the night before the test and another enema an hour before the examination.
• You may not need special preparation, especially if you have watery or bloody diarrhea.

Talk to your doctor about any concerns you have regarding the need for this test, its risks, how it will be done, or what the results may mean. To help you understand the importance of this test, fill out the medical test information form (What is a PDF document?).