. Anaesthetics : their uses and administration. cases assist in securing air exclusion. This is laid overthe chin and folded up in the hand, holding the mask in sucha way as to prevent air being sucked in around the air air pad should always be well inflated before use. It isalso necessary to see that the valves are acting and the expiryvalve is not covered up. The inspiry valves should be in ahorizontal plane, and the whole apparatus placed out of thereach of the surgeon and his assistants. Steadiness is certainly obtained by fixing the body of theapparatus to a stand placed on a tabl
. Anaesthetics : their uses and administration. cases assist in securing air exclusion. This is laid overthe chin and folded up in the hand, holding the mask in sucha way as to prevent air being sucked in around the air air pad should always be well inflated before use. It isalso necessary to see that the valves are acting and the expiryvalve is not covered up. The inspiry valves should be in ahorizontal plane, and the whole apparatus placed out of thereach of the surgeon and his assistants. Steadiness is certainly obtained by fixing the body of theapparatus to a stand placed on a table or fixed to the 250 ANESTHETICS. operating-table, and connecting it as above by means oftubing with the face-pieces (see fig. 52). When the opera-tion is on the neck or upper part of the trunk, it is better tohave the expiratory valve fixed in a connexion jbining thetube and face-piece with the vertical stem of the prevents exhalations passing over the area of valve aperture in the face-piece, if one exists, can be. Fig. 59.—The Vernon Harcourt inhaler fitted with a constant supply of oxygenfrom a cylinder of compressed oxygen arranged as a plenum inhaler. closed with a cork. This arrangement is shown in Plate v.). I am fully convinced that oxygen should be employedwhenever a general anaesthetic is in use, and this is especiallytrue of chloroform when given for severe operations involvingshock. It is to be used as an adjuvant and never to such anextent as to produce apnoea and so run the risk of provokingan acapnic condition. Mr. Harcourt has devised a somewhat CHLOROFORM. 251 complicated addition to his regulator which permits a very free supply of oxygen. It is shown in fig. 59, Such elaboration is, however, unnecessary as a tap fitted into the face-piece or metal connexion between the inhaler and the flexible tube leading to the face-piece answers every purpose. As wanned oxygen is far more efficacious the best plan is to allow the gas to pass
Size: 1504px × 1661px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidanaestheticsthei1914buxt
