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Lower Endoscopy (Colonoscopy)

What is an Endoscope?colonoscopy patient

During endoscopy, a long, narrow, flexible tube called an endoscope is used. This instrument contains a strong light and a microscopic video camera. Your G.I. tract can then be viewed on a video screen.

A laxative is given prior to the exam to enable the visualization of the colon. The endoscope is gently passed through the rectum and the entire colon is visualized. During the procedure, photos may be taken along with biopsies (samples) and polyps (growths) removed. These will help the physician in determining a diagnosis.


A nurse will prepare the patient for the procedure by checking vital signs and reviewing medical history/medications. An intravenous (I.V.) will be established to administer a mild sedative for comfort throughout the procedure.


Following the procedure the patient will be closely monitored in our specially equipped recovery room. Prior to the discharge, the nurse will review post procedure instructions (a copy will be sent with the patient) and answer any questions. Transportation arrangements must be made in advance, as patients will not be able to drive themselves home.

For more information on Pomona Valley Hospital Medical Center's Gastrointestinal Lab, please call 909.865.9858.