Colonoscopy
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How is the Test Performed?
You lie on your left side with your knees drawn up toward the abdomen. After administration of an intravenous sedative and analgesic, the instrument is inserted through the anus and gently advanced under direct vision to the terminal small bowel.
Air will be inserted through the scope to provide a better view. Suction may be used to remove secretions.
Since better views are obtained during withdrawal than during insertion, a more careful examination is done during withdrawal of the scope. Tissue samples may be taken with tiny biopsy forceps inserted through the scope. Polyps can be removed with electrocautery snares, and photographs can be taken.
Specialized procedures, such as laser therapy, can also be performed.
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