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Article
February 3, 1912

A PROSTATOMETERAN INSTRUMENT DEVISED FOR ESTIMATING THE SIZE OF AN ENLARGED PROSTATE

Author Affiliations

ST. LOUIS

From the Department of Genito-Urinary Surgery, St. Louis University School of Medicine.

JAMA. 1912;LVIII(5):339-340. doi:10.1001/jama.1912.04260020023010

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Abstract

This instrument, which I devised for the measurement of the prostate, is based on the principle of ordinary calipers used by workmen, adapting it to the immediate needs of the object to be obtained in prostate examination. It consists of two arms, the rectal arm B and the vesical arm A (Fig. 1).

The rectal arm is long enough and so curved that it may be introduced readily into the rectum. The tip of this arm ends in a small knob in order to make gentle pressure over the rectal projection. The curve of this arm is sufficiently ample to take an oblique measurement. The distal or external end, marked C (Fig. 1), ends in a movable joint which is held together with a thumb-screw to a short arm to which the bladder arm is attached by means of two smooth pivots.

The vesical arm consists of a flexible metal

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