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Rigid sigmoidoscope - a thin short tube which is able to investigate the back passage up to 20cms.
Sometimes a lighted, flexible fiber optic instrument (sigmoidoscope) may be inserted rectally in conjunction with a barium enema to visualize the bowel.
Sigmoidoscopy-A procedure in which a thin, flexible, lighted instrument, called a sigmoidoscope, is used to visually examine the lower part of the large intestine.
In this case, a diagnosis of iron deficiency anemia may include examination with a sigmoidoscope, a flexible, tube-like instrument with a light source that permits examination of the colon.
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