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A colonoscopy allows examination of the lining of your colon and rectum (the large intestine). This is performed with a flexible fiber-optic tube about the size of your finger. The test is performed while you lie on your side or back after you have received sedation. The doctor guides the scope through your large intestine. The procedure typically takes 15-30 minutes.

Why have a colonoscopy?

This procedure is performed for multiple reasons including colorectal cancer screening , evaluation of abdominal pain, bleeding, diarrhea or constipation. Colorectal cancer screening looks for polyps in the colon. Polyps are abnormal growths in the colon that are typically benign (non-cancerous). These polyps can eventually become malignant (cancerous) and therefore Dr. Rah will sample or remove any polyps seen during your colonoscopy.

What type of preparation is involved?

Please see link to our Patient Forms page for procedure instructions and details. Before your visit to one of our convenient Orange County locations where Dr. Rah will perform your colonoscopy, you will typically need to be off all anti-coagulants, aspirin or NSAID type medications 5 days prior to your colonoscopy. The day before your test, Dr. Rah will usually instruct you to be on a clear liquid diet and take either a small volume cleansing solution or special tablets. Dr. Rah will give you specific instructions on which prep is right for you. It is very important to follow the instructions carefully as your colon needs to be clean for an accurate and complete examination.