Colonoscopy
A guide to having a colonoscopy
What is a colonoscopy?
A colonoscopy is a procedure used to examine the inside of the large bowel, including the colon and rectum. It is performed using a thin, flexible tube called a colonoscope, which has a small camera at its tip and allows the lining of the bowel to be viewed in detail.
A colonoscopy may be recommended to investigate symptoms such as changes in bowel habits, rectal bleeding, persistent abdominal pain or unexplained anaemia. It can also be used to monitor existing bowel conditions or as part of screening for bowel cancer.
During the procedure, small tissue samples called biopsies can be taken if necessary, and polyps can often be removed at the same time. Mr Tewari will explain why a colonoscopy has been recommended and what the procedure will involve.
What happens during a colonoscopy?
Before your colonoscopy, you will be given instructions on how to prepare your bowel so that its lining can be seen clearly. This usually involves following a restricted diet and taking a bowel preparation medicine to empty the bowel before your appointment.
During the procedure, a flexible colonoscope is gently passed through the anus and into the large bowel. The camera at its tip allows Mr Tewari to carefully examine the bowel lining. Sedation and pain relief may be offered to help keep you comfortable during the procedure.
If an abnormal area is identified, a small tissue sample may be taken for further examination. Polyps can also often be removed during the colonoscopy. The procedure itself usually takes around 30 to 45 minutes, although this can vary depending on what is found and whether any additional procedures are required.
What can I expect after a colonoscopy?
After your colonoscopy, you will usually be able to go home the same day. You may experience some bloating, wind or mild abdominal discomfort for a short time afterwards as air is introduced into the bowel during the procedure.
If you have received sedation, you will need someone to take you home and you should avoid driving, drinking alcohol or operating machinery for the period advised by your clinical team. Most people can return to their normal activities by the following day.
Mr Tewari will discuss the initial findings with you and explain whether any further tests or treatment are required. If biopsies or polyps have been removed, these will be sent for examination and you will be advised when and how you can expect to receive the results.
Book an appointment
If you believe you need a colonoscopy or you have been referred to us by your doctor, please contact us to book an appointment.