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A 34-year-old member asked:

What does a flexible sigmoidoscopy feel like? are you out for it?

2 doctor answers9 doctors weighed in
Dr. Allen Seely
General Practice 31 years experience
'Flex sig' ='cramps': For a 'flex sig' you are usually awake with no anesthesia unless arranged ahead of time with your doctor/G.I. Doctor . The pain/cramps you experience is from the air placed in the lower colon so we can see the entire bowel wall . The usual indications for flex sig are for follow-up for known proctitis (colitis) otherwise a full colonoscopy is the best test for colon cancer screening.
Dr. Jan Rakinic
Colon and Rectal Surgery 38 years experience
Gas. Usually not.: Flexible sigmoidoscopy is usually perfomed without sedation. It is well tolerated. The sensation is like intestinal gas- some pressure but not intolerable. The use of carbon dioxide rather than air for inflation makes the procedure less uncomfortable.

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A 48-year-old member asked:

What is it like to have a flexible sigmoidoscopy or a colonoscopy ?

1 doctor answer2 doctors weighed in
Dr. Stephen Lloyd
Internal Medicine 46 years experience
Depends!: Very few physicians perform sigmoidoscopy anymore (only checks half the colon and no sedation!). Colonoscopy is usually done with sedation or anesthesia. The procedure itself is usually not uncomfortable. The cleaning out preparation can be arduous. Colonoscopy is 50 times more life saving than a mammogram!

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Last updated Apr 27, 2015

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