SCREENING FOR COVID-19 PRIOR TO PROCEDURES: To help ensure a safe procedure experience, all patients who are not fully vaccinated or have not had a confirmed diagnosis of COVID-19 in the past 3 months are required to have a COVID-19 PCR or ANTIGEN NASAL SWAB test within 3-5 days prior to a Flexible Sigmoidoscopy. We will help you arrange this. Prior nasal swab test results cannot be used if they were not done within 5 days of the procedure. Antibody test results also cannot be used in the place of a COVID-19 nasal swab.
Patients who are fully vaccinated (defined as being two or more weeks after receiving the final dose) or those with confirmed diagnosis of COVID-19 in the past 3 months, but greater than the past two (2) weeks (and no present symptoms) are not required to take a pre-procedure COVID-19 test. Proof of vaccination (CDC card or Excelsior Pass) or proof of lab-confirmed COVID-19 is required at the time of the procedure.
Adapted from the American Society for Gastrointestinal Endoscopy
What is a flexible sigmoidoscopy?
Flexible sigmoidoscopy lets your doctor examine the lining of the rectum and a portion of the colon (large intestine) by inserting a flexible tube about the thickness of your finger into the anus and slowly advancing it into the rectum and lower part of the colon.
What preparation is required?
Your doctor will tell you what cleansing routine to use. In general, preparation consists of one or two enemas prior to the procedure but could include laxatives or dietary modifications as well. However, in some circumstances, your doctor might advise you to forgo any special preparation. Because the rectum and lower colon must be completely empty for the procedure to be accurate, it’s important to follow your doctor’s instructions carefully.
Should I continue my current medications?
Most medications can be continued as usual. Inform your doctor about medications that you’re taking – particularly aspirin products or anticoagulants (blood thinners such as warfarin or heparin), or clopidogrel, as well as any allergies you have to medications.
What can I expect during flexible sigmoidoscopy?
Flexible sigmoidoscopy is usually well-tolerated. You might experience a feeling of pressure, bloating or cramping during the procedure. You will lie on your side in a comfortable position. An anesthesiologist will give you sedation through an intravenous line. Some patients prefer to have the procedure without sedation. A doctor advances the sigmoidoscope through the rectum and colon. As your doctor withdraws the instrument, your doctor will carefully examine the lining of the intestine.
What if the flexible sigmoidoscopy finds something abnormal?
If your doctor sees an area that needs further evaluation, your doctor might take a biopsy (tissue sample) to be analyzed. Obtaining a biopsy does not cause any pain or discomfort. Biopsies are used to identify many conditions, and your doctor might order one even if he or she doesn’t suspect cancer.
If your doctor finds polyps, he or she might take a biopsy of them as well. Polyps, which are growths from the lining of the colon, vary in size and types. Polyps known as “hyperplastic” might not require removal, but benign polyps known as “adenomas” have a small risk of becoming cancerous. Your doctor will likely ask you to have a colonoscopy (a complete examination of the colon) to remove any large polyps or any small adenomas.
What happens after a flexible sigmoidoscopy?
Your doctor will explain the results to you when the procedure is done. You might feel bloating or some mild cramping because of the air that was passed into the colon during the examination. This will disappear quickly when you pass gas. You should be able to eat and resume your normal activities after leaving your doctor’s office or the hospital, assuming you did not receive any sedative medication.
What are the possible complications of flexible sigmoidoscopy?
Flexible sigmoidoscopy and biopsy are safe when performed by doctors who are specially trained and experienced in these endoscopic procedures. Complications are rare, but it’s important for you to recognize early signs of possible complications. Contact your doctor if you notice severe abdominal pain, fevers, and chills, or rectal bleeding. Note that rectal bleeding can occur several days after the exam.