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Studies examine Third Eye Retroscope during colonoscopy
Date:3/18/2010

g it. For each polyp, the endoscopist indicated its size, its distance from the anal verge, and the segment of the colon in which it was found. When a polyp was seen during withdrawal, the TER was removed while maintaining the colonoscope in place. The polyp was then removed by using the tip of the colonoscope or the instrument (snare or biopsy forceps). Because each polyp was removed at the time that it was found, there was no possibility that a lesion could be counted twice.

The 20 subjects who were enrolled by each endoscopist were divided into quartiles, ie, the first five constituted the first quartile, the second five the second quartile, and so on. The learning curve was evaluated by comparing results among quartiles.

Overall, 182 polyps were detected with the colonoscope and 27 additional polyps with the TER, a 14.8 percent increase. A total of 100 adenomas were detected with the colonoscope and 16 more with the TER, a 16 percent increase. For procedures performed after each endoscopist had completed 15 procedures while using the TER, the mean additional detection rates with the TER were 17 percent for all polyps and 25 percent for adenomas. For lesions 6 mm or larger, the overall additional detection rates with the TER for all polyps and for adenomas were 23.2 percent and 24.3 percent, respectively. For lesions 10 mm or larger, the overall additional detection rates with the TER for all polyps and for adenomas were 22.6 percent and 19 percent. Mean withdrawal times in the first and fourth quartiles were 10.6 minutes and 9.2 minutes, a variance that researchers concluded was not significant. (According to ASGE quality indicators, average withdrawal time should be six minutes or more.)

Experienced endoscopists new to the TER were able to detect a mean of 15.4 percent additional adenomas during their first five procedures. After completing at least 15 procedures with the device, their mean additional detection rates with the TER com
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Contact: Anne Brownsey
abrownsey@asge.org
630-570-5635
American Society for Gastrointestinal Endoscopy
Source:Eurekalert

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