Sigmoidoscopy involves the insertion of a thin lighted instrument, the sigmoidoscope
, into the rectum to inspect the lining of the colon (the large intestine).
Similar to the flexible sigmoidoscope
, the colonoscope is a longer tube that allows the health care professional to examine the entire large intestine.
A study from Albert Einstein Medical Center in Philadelphia found that the percentage of cancers within reach of a flexible sigmoidoscope
declined from 65% in 1985 to 48% from 1985 to 1998.
With the arrival of fiber optics, it became possible to look directly at the inside of the colon--first through a short, flexible tube (the flexible sigmoidoscope
) and later, through a much longer version of the same instrument, the colono-scope, which extends four to six feet into the colon.
Colorectal cancer detection with the 60 cm flexible sigmoidoscope
in a solo general internist's office.
The most commonly used instrument is the rigid sigmoidoscope
, a metal instrument about 10 inches long that can view the interior of the rectum and the lower colon.
Tenders are invited for Supply of Fibreoptic sigmoidoscope
Of these 184 adenomatous polyps, 106 (58%) were potentially within reach of the flexible sigmoidoscope
. Only three adenocarcinomas were discovered during the entire study period.
Medical College, Karnal, Haryana_6_Paediatrics Sigmoidoscope
During his clinical practice, the index physician (W.H.) realized that many of the patients examined with the flexible sigmoidoscope
actually required examination of the entire colon.
Tenders are invited for Tender For Supply And Installation Of Sigmoidoscope
, Colonoscope And Upper GI Endoscope, Sodium Potassium Analyzer And Equipment For Measuring Diffusion To Dept.
Only one of the four Dukes stage C cancers detected by FOBT was in the descending colon, sigmoid, or rectum and thus was potentially within reach of the flexible sigmoidoscope
. The other five patients with colorectal cancers who were compliant with the screening recommendations had their cancers detected after they were symptomatic, qualifying as false-negative FOBTs.