Abstract
In the course of a study by Dr. Meltzer and myself of the use of continuous insufflation in the treatment of various forms of fatal poisoning, the apparatus described below was devised to simplify the control of anesthetic and pressure of air entering the lungs. By means of this device an animal may be kept in any desired state of anesthesia over a long period of time with little or no attention.
The apparatus consists of a three-necked Wolff-bottle or other convenient container for the anesthetic, so fitted with tubes (metal or glass) and stop-cocks that by turning slightly a single stop-cock any portion or all or none of the stream of air for respiration may be passed over the surface of the anesthetic, thus charging the air with any desired quantity of the anesthetic. The relative quantity of anesthetic in the inspired air may be read off on a convenient scale. The apparatus is also fitted with a manometer, and an escape stop-cock for regulating the pressure of the air entering the lungs. The cock regulating the quantity of air passing into the bottle is a three-way cock placed at the junction of a T-tube, the vertical limb of which passes through the stopper of a side neck of the bottle.
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