Archives of internal medicine . persistence of this rela-tively high positive pressure even when the animal was under deep narcosis. Thispressure was evidently harmful, as artificial respiration had to be resorted tobecause of the limited respiratory excursion permitted. Experiment 9.—Jan. 5, 1905: Large male rabbit. Ether narcosis, phrenic nerve exposed in the neck, and esophagus cut and tube passed tostomach and tied in place. Abdominal and pleural cannulas. Dorsal usual record of low positive or negative abdominal pressure was obtainedduring deep narcosis and
Archives of internal medicine . persistence of this rela-tively high positive pressure even when the animal was under deep narcosis. Thispressure was evidently harmful, as artificial respiration had to be resorted tobecause of the limited respiratory excursion permitted. Experiment 9.—Jan. 5, 1905: Large male rabbit. Ether narcosis, phrenic nerve exposed in the neck, and esophagus cut and tube passed tostomach and tied in place. Abdominal and pleural cannulas. Dorsal usual record of low positive or negative abdominal pressure was obtainedduring deep narcosis and a fluctuating positive pressure during light narcosiswas obtained. Cutting the right phrenic nerve caused a marked diminution inthe inspiratory rise in abdominal pressure (Fig. 9). Ammonia inhaled failed tocause any change in the pressures. Curare (2 eg.) was given by subcutaneousinjection and in ten minutes a gradually increasing muscular paralysis resulted indeath with both pleural and abdominal pressures registering Fig. 9.—Effect on rabbit of deep and light ether narcosis (Experiment 9,Jan. 5, 1905). A, pleural base; B, pleural pressure; C, abdominal pressure; D,abdominal base: E, time in fifths of a second. I, deep narcosis; II, fifteenminutes later. Reduced to two-thirds. Experiment 10.—Jan. 12, 1905: Black and tan dog, kilo. Ether, trache-otomy; both phrenic nerves exposed above the subclavian artery. Bougie tubetied into the esophagus. The effects of quiet respiration, the distention of thestomach with salt solution and cutting the phrenic nerves were observed. Theusual records were obtained in quiet respiration. Thoracic excursion was hin-dered and abtlominal pressure rose on distending stomach with 400 of saltsolution. Cutting phrenic nerves at the high level indicated did not materiallyaffect abdominal pressure (Fig. 10). HAVEN EMERSON 773 Experiment 11.—Jan. 14. 1905: White rabbit. Cocain used for local anes-thesia to right of mid-line just b
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