Archives of internal medicine . extreme nniseiilar relaxation, ami the durf^al position allowed ol collapse of thenormal abdominal shape, cansing a slight negative pressure. Experiment 15.—April 18, 1905: Rabbit under deep ether narcosis. Recordingmanometer with equal parts glycerin and water showed abdominal pressure from— 1 to 3 mm. aq. Experiment 16.—April 20. 1905: Powerful male oat. Ether. position. Carotid cannula to mercury manometer. Trocar in left pleuralspace to water-and-glycerin manometer. Trocar in mid-abdomen to recordingwater manometer. Effect of raising foot
Archives of internal medicine . extreme nniseiilar relaxation, ami the durf^al position allowed ol collapse of thenormal abdominal shape, cansing a slight negative pressure. Experiment 15.—April 18, 1905: Rabbit under deep ether narcosis. Recordingmanometer with equal parts glycerin and water showed abdominal pressure from— 1 to 3 mm. aq. Experiment 16.—April 20. 1905: Powerful male oat. Ether. position. Carotid cannula to mercury manometer. Trocar in left pleuralspace to water-and-glycerin manometer. Trocar in mid-abdomen to recordingwater manometer. Effect of raising foot of board was a rise of abdominal pres-sure. Raising head gave sometimes rise and sometimes fall; a rise if underliglit narcosis and a fall if under deep narcosis. Effect of manual presstire onabdomen noted. A fatal dose of strychnin nitrate killed the animal by graduallyincreasing muscular spasm and with a steadily rising intra-abdominal pressure in the abdomen Avas positive throughout the experiment and the. Fig. 11.—Effect of raising foot of dog-board 6 inches (Experiment 10, April20, 1905). A, pleural base; B, pleural pressure; C, abdominal pressure; D,abdominal base; E, time in fifths of a second. Reduced to two-thirds. thoracic pressure was negative. The carotid pressure fluctuated slightly, coinci-dent with the rise and fall in abdominal pressure (Fig. 11). Experiment 17.—April 21, 1905: Test of abdominal pressure on an etherizedeat showed a fluctuation between 2 and 5 mm., by a glycerin-and-water manometer(sp. gr. 1120). Experiment 18.—April 22, 1905: Dog, kilos ether, tracheotomy, carotidcannula. Abdominal pressure positive except on deep narcosis. Raising hind endof the animal always caused rise of abdominal and carotid pressure. Raising ofhead end caused fall of both pressures. The recording abdominal trocar was inthe costal angle just below the free edge of the liver. Another cannula connectedwith a mercury manometer and an air-pressure b
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