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The accompanying illustrations show a simple and efficient operative anal speculum devised to overcome the numerous difficulties usually encountered in the average anal operation.
It offers the following advantages:
It is simple and easily applied after the anus has been dilated manually.
It stays in place when once adjusted.
It takes the place of an assistant holding a large, cumbersome instrument.
It keeps the caliber of the anus constant during the operation.
It is easily adjusted.
It gives large, roomy working space over any area desired.
It is light, produces no trauma, and is not in the operator's way.
The opening in the ring gives ample room for operative procedures, and affords a clear and distinct view of the field of operation.
The speculum consists of a piece of metal 1 cm. wide and 3 mm. thick, the shape of the letter C, with the opening 3 cm. wide. At
Smiley O. OPERATIVE ANAL SPECULUM. JAMA. 1917;LXIX(2):121. doi:10.1001/jama.1917.25910290003014