A flexible sigmoidoscopy is a test which involves passing a flexible tube with a light on the end into your back passage (anus) to look at the lower part of your large bowel. This procedure can be uncomfortable, but most people manage without sedation. If you are anxious or your bowel is very inflamed, you may be given a light sedative. The test takes 5 – 10 minutes, but you may be in the department for two to three hours.

If you receive sedation, you must have someone collect you, take you home, and stay with you for at least 24 hours. There is no need to fast before the test; you may have a light breakfast or lunch before arrival.

Your bowel must be as clean as possible. You will be sent an enema to use at home, or a healthcare professional may give you one on arrival. Your appointment time includes preparation.

Please inform us if you may be pregnant. Stop taking iron tablets or bulking agents such as Fybogel or Regulan one week before your appointment. Bring all medications and your completed Consent Form.

Preparing for the Procedure

What is a Flexible Sigmoidoscopy?

The purpose of the procedure is to find the reason for your symptoms. Specimens may be taken from the bowel lining. If small polyps are found, they may be removed or biopsied.

What About My Medication?

What Happens During the Procedure?

Haemorrhoids (piles) may be treated with Rubber Band Ligation, which is relatively painless. A healthcare professional will discuss this with you and provide aftercare instructions if needed.

The procedure lasts 5 – 10 minutes, though waiting times may vary. Staff will monitor your condition throughout. If sedation is used, you will receive oxygen and monitoring and must stay until recovered. You will be offered tea and biscuits afterwards.

Potential Complications

Flexible sigmoidoscopy mainly examines the left colon, where most problems occur. Complications are rare. Bowel perforation occurs in around 1 in 15,000 cases and may require surgery. Reactions to sedation or pain medication can also occur.

Bleeding after polyp removal is rare but increased if you take anticoagulants such as Warfarin. Hospital admission may be required. Discuss risks with your GP if unsure.

Mild abdominal discomfort is common and usually settles within one to two days. If sedated, do not drive, work, operate machinery, or sign legal documents for 24 hours. You must be collected by a responsible adult.

If you have questions, contact the Endoscopy Unit at Forth Valley Royal Hospital:

• Phone: 01324 567518 (Mon – Fri, 09:00 – 16:00)