Diagnostic Colonoscopy
What is a colonoscopy?
A colonoscopy is an investigation in which the lining of your colon (large bowel) is examined with a colonoscope. A colonoscope is a long, thin, flexible endoscope - a smooth bendy tube with a light source and camera built into the tip. Colonoscopy is usually performed as a day case. Following a special diet and taking bowel preparation in the days leading up to colonoscopy helps to ensure the bowel lining is visible.
Why am I having a colonoscopy?
Your doctor may have referred you for this procedure in order to investigate symptoms such as anaemia, rectal bleeding, or a change in your bowel habit. You may have been referred for further investigation of an abnormality shown on x-ray, or as a result of a screening programme.
You may also be having a colonoscopy as part of your follow-up for surveillance of conditions such as inflammatory bowel disease, bowel cancer, or after removal of a polyp.
Colonoscopy allows the endoscopist (specialist doctor) to directly view the lining of the colon. During this procedure the endoscopist can take a biopsy (a small sample of tissue) for testing if necessary. The tissue is removed painlessly through the colonoscope using tiny forceps (like small tongs) and sent off for examination. We can also treat and remove polyps if any are found. Polyps are small, fleshy growths on the lining of the bowel, which are usually harmless but, in some cases, can progress to form cancers.
How long does the procedure last?
The colonoscopy usually lasts about half an hour, although it may take longer in some cases. You should expect to be in the hospital for at least 3-4 hours so that you can be admitted and recovered safely.
What happens after the procedure?
You will need to remain in recovery for about another hour after the procedure if you have had sedation. A nurse will monitor and support you until you are fully awake. (If you have had Entonox alone, the effects will wear off within 30 minutes). When you are feeling comfortable and alert, you can get dressed and we will escort you through to our discharge lounge for refreshments. The nurse will contact the person who is collecting you.
When will I know the results of my colonoscopy?
Once you have had something to eat and drink, the nursing staff will go through your report with you. This will take place in a private room where you can ask any questions you may have. We prefer to do this once you have someone with you, as sedation can make it difficult for you to remember things.
