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Flexible sigmoidoscopy
Category: Endoscopy & Camera Tests · All endoscopy & camera tests
What it is
A flexible sigmoidoscopy examines the lower part of the large bowel (rectum and sigmoid colon) with a thin, flexible camera, to a depth of roughly the final third of the colon.
Why it is done
It is used to investigate bleeding from the back passage, changes in bowel habit and symptoms thought to arise from the lower bowel, often as a quicker, more limited alternative to full colonoscopy.
How to prepare
Preparation is lighter than for colonoscopy — usually a small enema on the day, or short laxative preparation, rather than full bowel prep. Your appointment letter will explain. Tell the team about blood-thinning medicines.
What happens during the procedure
You lie on your side and the scope is passed into the back passage while air opens the bowel view, which can cause brief cramping. Samples can be taken and small polyps removed. It usually takes 10 to 20 minutes and sedation is often not needed.
Afterwards — recovery & results
Most people can go home and return to normal activities straight away if they have not had sedation. Some bloating is normal for a few hours. Biopsy results take one to three weeks.
Risks & considerations
Risks are lower than for full colonoscopy but include discomfort, minor bleeding after biopsies, and a very small risk of bowel perforation. If the findings suggest problems higher up, a full colonoscopy may be recommended.
Related guides on MedicalVideos.com
Frequently asked questions
Why not just do a full colonoscopy?
Many symptoms come from the lower bowel, which this test reaches. It is quicker, needs less preparation and often no sedation, so it is a sensible first step for suitable problems.
Can I drive myself home?
If you have not had sedation, yes. If you choose sedation, you will need an escort and must not drive for 24 hours.
Related procedures — Endoscopy & Camera Tests
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