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October 29, 1927, Vol 89, No. 18 >
ARTICLE | October 29, 1927

A SELF-RETAINING ANOSCOPE

W. D. Pennington, M.D.
JAMA. 1927;89(18):1514. doi:10.1001/jama.1927.92690180002013b.
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ABSTRACT

This instrument is composed of three parts: (1) the anoscope proper; (2) a sliding bar; (3) an insulated detachable lamp. It is made in one length, 3½ inches, and is one half, three fourths or 1 inch in outside diameter.

The proximal end is provided with a conical flange 2 inches in diameter with a slot which permits easy withdrawal of a sliding bar, so that fields in the anal region to be explored and inspected are successfully exposed. The distal end is conical to permit easy introduction, and is so constructed that it provides shoulders, 2 inches from the proximal end, to prevent expulsion of the instrument while the operator is at work, thus eliminating the need of an assistant.

The lamp attached to an insulated device is anchored to the 2 inch flange in a position best to illuminate the field to be observed. The insulation prevents shock

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