Word: nitrous
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Dates: during 1930-1939
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...stubborn surgical problems is the relief of pain in childbirth. Injection of synthetic, cocaine-like drugs, such as novocain and procaine, into the canal of the spinal cord is objectionable because such injections act on the cord and brain, interfere with the heart. Anesthetics such as ether and nitrous oxide (laughing gas) are harmful because they cause a deficiency of oxygen in the blood streams of mother and child...
...Nitrous Oxide Defended...
...impaired physical conditions observed in this instance are in reality due to the lack of oxygen rather than to the anesthetic. If the highly specialized cells of the brain are deprived of their essential oxygen too long, irreparable damage may result. Such after-effects are not confined to Nitrous Oxide-Oxygen, as they may and do follow the use of other anesthetic agents, for example, ether as mentioned in the report. Destruction of the brain cells may occur as a result of asphyxia without anesthesia...
...unfair to single out Nitrous Oxide in this manner, when the same condition may result due to the lack of oxygen when any other general anesthetic is being administered. We feel that it is especially unfortunate that your reference gives the impression that damage to the brain as described is due to the anesthetic agent, rather than the attendant lack of oxygen...
Statistics generally show Nitrous Oxide-Oxygen to be the safest anesthetic we have...