What is it?
Colonoscopy is an examination of the entire large intestine using a flexible video scope inserted through the anus.
It is the single best test for finding and treating polyps early, before they have a chance to become cancer.
Procedure
Colonoscopy and Polyp Removal
Examination of the large intestine using a flexible scope. Recommended for unexplained bleeding, chronic diarrhoea, family history of colon cancer, or routine screening after age 45.
Who needs it?
- Bleeding from the back passage, blood mixed with stool, or unexplained drop in haemoglobin.
- New change in bowel habit lasting more than a few weeks, especially after age 40.
- Chronic diarrhoea, persistent abdominal pain, or suspected inflammatory bowel disease.
- Screening from age 45, or earlier if there is a family history of colon cancer or polyps.
How it works
You will lie on your left side under sedation.
The scope is passed gently through the rectum and around the colon. The entire test usually takes 20 to 30 minutes.
If a polyp is found, it is usually removed in the same sitting using a small wire snare. The polyp is then sent for analysis.
Preparation
- A bowel preparation drink is given the evening before. This is the most important part of the test, since the colon must be clean to see clearly.
- Only clear fluids on the day of preparation. Detailed instructions are given at the time of booking.
Recovery
- Mild abdominal bloating from residual air is normal and settles within a few hours.
- You can return to normal diet the same day.
- If polyps were removed, avoid heavy lifting and aspirin/blood thinners for a week unless advised otherwise.
Risks
All endoscopic procedures carry a small risk of bleeding, perforation, or reaction to sedation. These risks are uncommon when the procedure is done by a trained endoscopist in a hospital setting.
We will explain the risks specific to your case during the consultation, before you sign consent.
Common questions
Things patients ask us.
How often should I get screened?
For average-risk adults, every 10 years from age 45. Sooner if a polyp is found or if you have a family history.
Is the bowel prep really necessary?
Yes. A poorly prepared colon means polyps and cancers can be missed.
Related procedures
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