Archives of internal medicine . 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,
Archives of internal medicine . 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 bottle was then inserted in the. fd -^ c
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