The administration of nitrous oxide and oxygen for dental operations / by Frederick W. Hewitt.

  • Hewitt, Frederic W. (Frederic William), Sir, 1857-1916.
Date:
1901
Catalogue details

Licence: Public Domain Mark

Credit: The administration of nitrous oxide and oxygen for dental operations / by Frederick W. Hewitt. 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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    and when a considerable percentage of oxygen has been used. They are not necessarily followed by vomiting, even though food be present in the stomach. When the patient has abstained from food for several hours, both retching and vomiting are very exceptional. Micturition.—I have only known this to occur twice in the ] 5 years during which I have administered nitrous oxide and oxygen, and in these cases no such accident would have taken place had the usual precautions been adopted. Dangerous symptoms. — When sufficient oxygen is administered with nitrous oxide to prevent asphyxial complications there is every reason to believe that the anaesthesia produced is free from risk to life. A careful study of every fatality which has been recorded in connection with the use of nitrous oxide oras o shows that in most, and probably in all cases in which this agent has caused death,'absence of oxygen has been primarily responsible for the occurrence. A similar explanation is doubtless applicable to those reported cases in which alarming symptoms have taken place during the administration of nitrous oxide by the customary method. The addition of oxygen to nitrous oxide renders this agent respirable, and robs it of its chief, if not its only, risk. There has not yet been recorded a single