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BY O. ONEAL, M.D., WABASH, IND.
Finding the ordinary anal speculum so unsatisfactory, I have devised the one here represented, and which I find to admirably meet the objects I had in view. The blades are three and three-quarter inches long, and can be dilated at the points by means of the screw. When closed, the instrument is round the entire length, the diameter at the outlet is one inch. Each blade has a slot three-fifths of an inch wide, and two and three-quarter inches long. These are closed by perfect fitting slides.
It is introduced closed, then by withdrawing one slide at a time the walls of the lower part of the rectum can be inspected. Wishing to examine higher up you can do so by means of the screw. This dilates the points of the blades, while the outlet remains about the same. The advantage claimed for this
A NEW RECTAL SPECULUM. JAMA. 1884;III(24):669–670. doi:10.1001/jama.1884.02390730025012
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