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Thus far in rectal anesthesia two phases of the administrative technic have given trouble: (1) the simultaneous supply of oxygen with the warmed ether vapor or its independent use after the completion of the operation to facilitate recovery, and (2) the accumulation of gas in the bowels without any satisfactory method of egress.
The accompanying sketch of a device for use in conjunction with the Cunningham apparatus shows how these troublesome phases have been overcome.
V is the Haslam bladder-washer with an additional hole bored into the core at the opening 0, and a groove cut across the core for one-third of the distance from the exit tube to the inlets, thus making a three-way valve. With the lever at I both oxygen and ether are admitted ; the movement of the lever toward E gradually shuts off the oxygen and admits ether vapor alone; the lever moved toward 0
McMECHAN FH. A NEW DEVICE FOR RECTAL ANESTHESIA. JAMA. 1909;LIII(19):1559–1560. doi:10.1001/jama.1909.92550190035002
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