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Anoscopes in current use are usually of two types. The speculum is either beveled at the end or has a longitudinal cutout part for inspection of the anorectal area. Both types have certain disadvantages. With the former, the instrument frequently slips out during the course of the examination and many insertions are necessary before the examination is completed. The difficulties of reinsertions in the obese patient can be readily understood. With the latter type, the cutout portion of the speculum is too narrow for proper evaluation of the anal area, the edges are sharp, and rotation pinches or cuts into the mucosa. In addition, these anoscopes are of solid construction and rotation must be accomplished by motion of the handle.
With these objections in mind, a new anoscope has been designed to provide for the complete examination and evaluation of the anorectal area. This instrument allows distal, intermediate, and proximal
Abramson DJ. AN IMPROVED AND ROTATABLE ANOSCOPE. JAMA. 1956;160(10):874–875. doi:10.1001/jama.1956.02960450056012b
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