About the colonoscopy procedure
During the procedure, your doctor will pass the colonoscope gently up though your anus (back passage), through your rectum and into your large bowel. As the colonoscope is guided through, the camera sends images to a monitor screen for your doctor to see. To get a better view, your doctor will pump air into your bowel through the colonoscope to help inflate it.
Your doctor will use a lubricant jelly to help insert the colonoscope. They may also offer you a sedative and painkiller to help you relax and make the procedure as comfortable as possible. You may be asked to move into a different position during the procedure. This can help your doctor to see all the different parts of your bowel. They may also press on your tummy at times to help guide the colonoscope.
If your doctor needs to, they may take a small sample of cells – known as a
biopsy – from your large bowel during the procedure. These cells will be sent to the laboratory for testing.