1900 Journal of the American Medical Association (JAMA)  
quickly as possible the oxygen percentage is increased, up to as great quantity as the patient will stand without interfering with anesthesia. I would also like to show you a very simple method of using gas and oxygen. This consists of one gas bag, attached to which is an inverted YTshaped tube, to which separate pieces of rubber tubing are attached. Two cylinders are used, and the bag is fairly well filled with gas, then oxygen let in. The proportions are varied according to the effect
more » ... the effect produced on the patient. Considerable experience is necessary to determine the relative quantities of the gases, and, if preferred, oxygen may be permitted to flow into the bag first. It is desirable to have the oxygen proportion as near 10 per cent, as possible, though in some patients much less than this can only be used to produce good results. After-effects produced by nitrous oxid are rare. Consciousness is usually, though not always, immediately regained. The patient, often conscious, will not always be inclined to talk. Headache, sometimes intense, lasts for hours. Nausea and vomiting is sometimes intense, especially when the patient has failed to abstain from eating. I remember a patient who, after a half hour of narcosis, had intense retching and vomiting of undigested grapes, eaten five hours before. Another, I was told, had dilated pupils for two days, and could not read during that time. Still another was anesthetized by me seven times with nitrous oxid. At the last three, on her return to consciousness, she had a look of most
doi:10.1001/jama.1900.24610120006001c fatcat:2knxi23r7zdztamefvbqilj7ue