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Tag: polyps

Improving Lesion Detection During Colonoscopy: Summary

In the beginning of the colonoscopy era, this technique was accepted as the most accurate method of investigation for the large bowel. Since then, studies have shown that colonoscopy may miss lesions that may be responsible for cancer of the right colon. Endoscopists have tried several methods for increasing the ability to visualize the right […]

Improving Lesion Detection During Colonoscopy: Study Results

Up to this time, there have been 5 published reports on the TER. The first report was a feasibility study using colon models implanted with 40 simulated polyps, 27 of which were attached to the proximal aspect of folds and 13 of which were placed in obvious locations readily seen by the straight forward-viewing colonoscope. […]

Improving Lesion Detection During Colonoscopy: The Third Eye Retroscope

How It Works The Third Eye Retroscope (TER; Avantis Medical Sys­tems, Inc.) is a self-contained endoscope that can be advanced through the instrument channel of a standard colonoscope and was developed specifically because of the inability of the standard forward-viewing colonoscope to detect all polyps located behind folds and flexures in the colon during screening […]

Improving Lesion Detection During Colonoscopy: Retroversion and Retroflexion

Realizing the problem of missed lesions, endoscopists have attempted to increase the amount of mucosa directly visualized. This thrust originally started in the rectum, where retroflexion was readily performed, and previously unseen areas were brought into view by purposely making a 180-degree rotation in the rectal ampulla.

Improving Lesion Detection During Colonoscopy: Wide-Angle Colonoscopy

For years, instrument manufacturers have tried to develop colonoscopes that afford a better, clearer, or new method of casting light on the mucosal surface (eg, narrow-band imaging) to enhance the ability to detect adenomas. The problem of missed lesions was demonstrated by Pickhardt and coworkers, who performed a computed tomographic colonography (CTC) evaluation of over […]

Improving Lesion Detection During Colonoscopy

Colonoscopy Since its introduction, colonoscopy has generally been accepted to be the most effective method for examining the colon. Colonos­copy became a popular diagnostic and therapeutic modality for the large bowel shortly after it was introduced. Because of its ability to visualize the mucosal surface of the colon and delineate stool from polyps, colonoscopy has […]