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A rigid sigmoidoscope is a straight medical instrument used to examine the rectum and lower part of the sigmoid colon. It is shorter and less flexible than a flexible sigmoidoscope. The instrument usually has a hollow tube, light source, and viewing system. The procedure that uses it is called rigid sigmoidoscopy.
read more about rigid sigmoidoscope ...A rigid sigmoidoscope is used to look directly at the rectum and lower sigmoid colon. It can help evaluate rectal bleeding, pain, discharge, bowel changes, inflammation, hemorrhoids, polyps, tumors, or other lower bowel problems. It may also be used to guide biopsy or minor treatment in selected cases. The exam is limited to the lower bowel and does not replace a full colonoscopy when the entire colon needs evaluation.
A rigid sigmoidoscope is straight and gives a more limited view of the lower rectum and sigmoid area. A flexible sigmoidoscope is bendable and can usually reach farther into the lower colon. Flexible sigmoidoscopy is more commonly used for screening and broader lower-colon evaluation. The provider chooses the instrument based on the reason for the exam and the area that needs to be checked.
The patient is positioned on the exam table, and the lower bowel may need preparation such as an enema. The provider lubricates the instrument and gently inserts it through the anus into the rectum. Air may be introduced to improve the view of the bowel lining. The provider examines the tissue and may collect a sample if needed.
Rigid sigmoidoscopy can cause pressure, cramping, bloating, or the urge to have a bowel movement. Severe pain is not expected and should be reported during the exam. Possible risks include minor bleeding, irritation, infection, or rare injury to the bowel wall. Heavy bleeding, fever, severe abdominal pain, or dizziness after the exam needs medical attention.
No. A rigid sigmoidoscope examines the rectum and lower sigmoid area, while a colonoscope can examine the entire colon.
Most rigid sigmoidoscopy exams do not require sedation. The provider may discuss comfort options depending on the patient and reason for the exam.
Yes. A provider may use instruments through the scope to collect a small tissue sample when clinically needed.
It reaches only the rectum and lower sigmoid colon. The exact distance depends on the instrument, anatomy, and patient tolerance.
Proctoscopy (Rigid Sigmoidoscopy). Cleveland Clinic. https://my.clevelandclinic.org/health/procedures/10749-proctoscopy. Date Accessed June 16, 2026.
Rigid Sigmoidoscopy (Proctoscopy). Nuffield Health. https://www.nuffieldhealth.com/tests-scans/rigid-sigmoidoscopy-proctoscopy. Date Accessed June 16, 2026.
Rigid Sigmoidoscopy. York and Scarborough Teaching Hospitals NHS Foundation Trust. https://www.yorkhospitals.nhs.uk/seecmsfile/?id=6991. Date Accessed June 16, 2026.
Sigmoidoscopy. Canadian Cancer Society. https://cancer.ca/en/treatments/tests-and-procedures/sigmoidoscopy. Date Accessed June 16, 2026.
Rectal Cancer. StatPearls (NCBI Bookshelf). https://www.ncbi.nlm.nih.gov/books/NBK493202/. Date Accessed June 16, 2026.