Sigmoidoscopy
What is a Sigmoidoscopy?
A sigmoidoscopy is a diagnostic procedure that allows doctors to examine the lower part of the colon (sigmoid colon) and rectum using a flexible tube with a camera called a sigmoidoscope. It helps detect abnormalities such as polyps, inflammation, or early signs of colorectal cancer.
What qualifies you for a Sigmoidoscopy?
You may need a sigmoidoscopy if you:
– Experience rectal bleeding or persistent changes in bowel habits
– Have a family history of colorectal cancer or polyps
– Are undergoing screening for colorectal disease
– Require follow-up after abnormal findings in previous colon examinations
Advantages of Sigmoidoscopy
– Minimally invasive with low risk
– Allows early detection of polyps and cancer
– Shorter procedure time compared to full colonoscopy
– Can help diagnose inflammatory bowel disease and other rectal conditions
– Quick recovery and usually outpatient
How it works
The procedure is performed under local anesthesia or light sedation. The sigmoidoscope is gently inserted through the rectum to examine the lower colon. The camera transmits live images to a monitor, and biopsies or polyp removals can be performed if needed. The procedure typically takes 10–20 minutes.
Before-care instructions
– Follow a clear liquid diet 12–24 hours before the procedure
– Use prescribed bowel preparation to cleanse the lower colon
– Avoid certain medications as instructed
– Arrange for transportation if sedation is used
Recovery and post-care
– Most patients return home the same day
– Mild cramping or bloating may occur
– Resume normal diet gradually
– Follow-up as advised for biopsy results or further evaluation
FAQ
What does sigmoidoscopy check for?
It examines the lower colon for polyps, bleeding, and inflammatory conditions
Is sedation required?
Usually no; most patients tolerate the procedure well without sedation.
How long does it take?
About 10–15 minutes.