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Flexible Sigmoidoscopy

A patient laying on a procedure table while two GI care providers perform a flexible sigmoidoscopy procedure.

A flexible sigmoidoscopy is a nonsurgical outpatient procedure that is used to view the inside lining of the rectum and lower section of the colon (known as the sigmoid colon or descending colon).

A sigmoidoscope is a long, thin tube equipped with a light and viewing instrument that sends images to a monitor. A gastroenterologist may perform a flexible sigmoidoscopy to look for a number of conditions or diseases in the lower colon or rectum, such as:

  • Inflammation
  • Polyps
  • Ulcers
  • Cancer

Sigmoidoscopy is most frequently used as a screening tool for colon cancer. It is helpful in determining the cause of abdominal pain, unexplained weight loss, bowel obstruction, changes in bowel habits, or bleeding from the anus. Your doctor can also obtain a tissue sample (biopsy) and remove any polyps found during the procedure.

How to Prepare for Flexible Sigmoidoscopy

You will need to undergo bowel prep similar to preparing for a colonoscopy. Your doctor will provide you with specific instructions. Your doctor will also let you know if or when you should adjust or stop any medications you take. This procedure does not require sedation or general anesthesia, so you do not need a close friend or family member to accompany or drive you to and from your appointment.

What to Expect

Flexible sigmoidoscopy does not require any kind of sedation. You will lie on your left side with your knees bent for the procedure, also known as the fetal position. Your doctor may first perform a digital rectal exam to check for obstructions.

Your doctor will then insert the sigmoidoscope through your anus into your rectum and the lower section of your colon. Air will then be pumped through the sigmoidoscope to inflate the colon, so it is easier to see. A small camera mounted on the endoscope will transmit live images to a video monitor. You may need to change positions during the procedure, so the scope can be adjusted for better viewing.

Special instruments may be inserted through the sigmoidoscope to obtain tissue samples or remove abnormal growths.

A flexible sigmoidoscopy takes about 20 minutes. The procedure may cause temporary discomfort, such as mild cramping or bloating. It is common to pass gas during and after a flexible sigmoidoscopy.

Your doctor will review the results of your flexible sigmoidoscopy with you after your procedure or during a follow-up appointment. It may take time to receive biopsy results. If polyps or other abnormal tissues are found, the doctor may suggest examining the rest of the colon with a colonoscopy.

Top Stomach Ulcer Treatment in Austin, TX

Identify and address lower digestive tract concerns with flexible sigmoidoscopy, a quick and effective diagnostic procedure. At Austin Gastroenterology, our dedicated team ensures a smooth and supportive experience, providing the answers you need to feel your best. Take the next step in your digestive health journey today. To schedule an appointment, you can send us a message on Klara or fill out our secure online appointment request form. We proudly serve our community from 18 convenient locations around the greater Austin area.

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Austin Gastroenterology offers dedicated care for various gastrointestinal and liver conditions through a range of in-office procedures, diagnostic and screening procedures, advanced endoscopic procedures in hospital, and other specialized GI care services. We have 18 offices throughout the greater Austin area, including GI care clinics, endoscopy centers, and infusion centers.