flexible sigmoidoscope


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flexible sigmoidoscope

A sigmoidoscope that uses fiberoptics. This permits the tubular extension to flex, enabling the examiner to visualize a greater portion of the colon than would be possible with a rigid sigmoidoscope.
See also: sigmoidoscope
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Eighty percent of the lesions found by the 60-cm flexible sigmoidoscope were beyond the reach of the rigid sigmoidoscope.
None of these lesions would have been found if, because of a negative fecal occult blood test, the patient had not been examined using a 60-cm flexible sigmoidoscope. All of these findings were beyond the reach of the 30-cm flexible sigmoidoscope.
Rodney, Hocutt, and Johnson and their co-workers[8,30-33] have provided convincing evidence to document the value of aggressive colorectal screening by properly trained family physicians using the 60-cm and 65-cm flexible sigmoidoscopes. Their earlier research supports the findings of this study; namely, that the 60-cm flexible sigmoidoscope is more effective in detecting lesions than either the shorter rigid or the shorter flexible sigmoidoscope.
It cost the Kaiser HMO an estimated $70 per patient to perform each examination using a 60-cm flexible sigmoidoscope, or $70,000 for the 1000 patients involved in this study.
Five adenomas found by the 60-cm flexible sigmoidoscope in this study were between 2.0 cm and 5.3 cm in size, and four of these had villous morphology.
The investigators believe that there is a role for screening with the 60-cm flexible sigmoidoscope even in clinically asymptomatic individuals who are over 45 years of age and have negative fecal occult blood tests.
The relative risk (RR) of colorectal cancer found within reach of the flexible sigmoidoscope is a function of the proportion of distal cancer and the total incidence of cancer for the groups being compared.

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