The physician can see abnormalities, like inflammation or bleeding, through the endoscope that don't show up well on x rays. The physician can also insert instruments into the scope to remove samples of tissue (biopsy) for further tests or treat bleeding abnormalities.
Possible complications of upper endoscopy include bleeding and puncture of the stomach lining. However, such complications are rare. Most people will probably have nothing more than a mild sore throat after the procedure.
The procedure takes 20 to 30 minutes. Because you will be sedated, you will need to rest at the endoscopy facility for 1 to 2 hours until the medication wears off.
Your colon must be completely empty for the colonoscopy to be thorough and safe. To prepare for the procedure you may have to follow a liquid diet for 1 to 3 days beforehand. A liquid diet means fat-free bouillon or broth, strained fruit juice, water, plain coffee, plain tea, or diet soda. Gelatin or popsicles in any color but red may also be eaten. You will also take one of several types of laxatives the night before the procedure. Also, you must arrange for someone to take you home afterward--you will not be allowed to drive because of the sedatives. Your physician may give you other special instructions. Inform your physician of any medical conditions or medications that you take before the colonscopy.
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