Rigid Sigmoidoscopy

What is a rigid sigmoidoscopy?

A rigid sigmoidoscopy is a procedure used to examine the rectum and the lower part of the bowel. It involves using a short telescope called a sigmoidoscope. The sigmoidoscope is about the thickness of a finger and has a light to give a clear view of the bowel lining. This test is often done in an outpatient setting and can help diagnose conditions causing rectal bleeding, anal symptoms or changes in bowel habit.

Why is rigid sigmoidoscopy performed?

A rigid sigmoidoscopy may be recommended to investigate:

• Rectal bleeding or blood in the stool
• Persistent diarrhoea or constipation
• Unexplained anal pain or discomfort
• Suspected haemorrhoids or rectal polyps
• To monitor existing bowel conditions

The results help guide your doctor in determining the most effective treatment or whether further tests are needed.

Benefits of rigid sigmoidoscopy

• Diagnosis: The procedure provides clear images of the rectum and lower bowel, helping to identify a range of conditions including, haemorrhoids, fissures, rectal polyps and inflammatory conditions.
• Quick and minimally invasive: The test is usually completed in less than five minutes without the need for preparation or any anaesthetic.

Do I need any preparation beforehand?

No special preparation is needed for a rigid sigmoidoscopy. You do not need to fast or take laxatives before the procedure.

What happens during the procedure?

The procedure is quick and straightforward, typically performed in an outpatient clinic.

• Positioning: You will be asked to lie on your left side on an examination couch, with your knees bent.
• Insertion of the scope: The doctor will gently insert the sigmoidoscope into the rectum.
• Introduction of air: Some air will be introduced into the bowel to expand it slightly, which allows the doctor to see the lining clearly.
• Viewing: The doctor will carefully examine the rectum.

The test usually takes only a few minutes. While you may feel mild discomfort or a sense of fullness, the procedure is not painful.

What are the potential risks?

Rigid sigmoidoscopy is a very safe procedure, but as with any medical test, there are some small risks, including:

• Mild discomfort: You may feel a sensation of fullness or slight pressure during the test.
• Bleeding: Rarely, minor bleeding can occur. This usually stops on its own.

If you experience severe pain or heavy bleeding after the procedure, seek medical attention promptly.

What happens after the procedure?

After the procedure, you can usually resume your normal activities including eating and drinking straight away.

You may experience some mild bloating or the urge to pass wind, but this typically settles quickly.

Your doctor will explain the findings of the procedure immediately and will inform you if any further tests, treatments or follow-up appointments are required.

Going home:

You can go home shortly after the procedure. You don’t need anyone to accompany you.