Experimental research into the surgery of the respiratory system.

  • Crile, George Washington, 1864-1943.
Date:
[1899], [©1899]
Catalogue details

Licence: Public Domain Mark

Credit: Experimental research into the surgery of the respiratory system. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    periments the vagi were cut, and after testing the effects with severed vagi, atropine was given as in the preceding; then the same experiment was repeated, obtaining prac- tically the same results. 6. On a mongrel dog weighing fifteen pounds, under conditions similar to the preceding, the following experi- ments were performed: (a) A control blow over the right side of the chest was delivered, causing thereby temporary irregularity in the respiratory action and a marked fall in blood-pressure, produced by a single intermission. (b) Similar effects were produced by delivering blows with considerable force over various portions of the chest. However, the nearer the heart area the more marked was the effect. (c) With the vagi cut similar blows produced like re- sults upon the circulation, but no effect on respiration. 7. On a shepherd-dog weighing twenty-five pounds, under conditions similar to the preceding, the following experiments were performed: (a) A blow delivered with great force over the pit of the stomach produced a sudden drop in the blood-press- ure, continuing during the time of a single beat. The respirations were but momentarily altered. (b) A similar blow upon the abdomen over the um- bilicus produced no effect. (c) A blow was delivered over the kidneys and the lower abdomen, but produced no effects. (d) As a control, a blow was again delivered upon the chest over the heart, producing a more gradual though marked fall, which was recovered in ten seconds.