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November 25, 1899, Vol XXXIII, No. 22 >
ARTICLE | November 25, 1899

New Instrument.

JAMA. 1899;XXXIII(22):1376. doi:10.1001/jama.1899.02450740064029.
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ABSTRACT

A BIVALVE SPECULUM WITH AN OBTURATOR.  BY J. RAWSON PENNINGTON, M.D.CHICAGO.This cut represents the author's bivalve speculum, grasped with the full hand ready for introduction. "O" is the obturator. It is a bivalve and tubular speculum combined, embodying the properties and applications of each. When it is introduced and the obturator is removed, a portion of the rectum equal to the area of the circumference of the instrument is at once painlessly exposed for inspection, and by slightly opening the blades this field is greatly enlarged. It being a tubular instrument, by placing the patient in the knee-chest posture, you can inspect the entire rectum, semilunar valves and sometimes part of the sigmoid flexure.

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