Abstract
My purpose in presenting a paper on nitrous oxidoxygen is to bring out, as forcefully and briefly as possible, its advantages and the added value of rebreathing to combat shock. Some forty years ago, Dr. Andrews of Chicago discovered that by adding oxygen to nitrous oxid during its administration, the cyanosis was eliminated without impairment to its anesthetic properties. Since that time nitrous oxid has been widely used, but considered mostly as a dental anesthetic and for use in very minor surgical operations; the layman knows it as "laughing gas." During the lat few years attention has been called to nitrous oxid anesthesia more seriously, and after extensive use and investigation by some of our leading surgeons—such as Crile, Meyer, Halsted, Kelley, Bevan,vand the extended laboratory investigations of Hamburger and Ewing—of the comparative effects of nitrous oxid, ether, and chloroform narcosis on the blood, the American Medical Association reports on
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