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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    or other pressure upon the trachea, very ad- vanced phthisis, hydrothorax, and other grave respiratory conditions. Putting such excep- tional cases on one side, we may safely administer nitrous oxide and oxygen to all other patients. Affections of the circulatory system.—It is well known that patients with diseases of the heart are good subjects for anaesthetics, pro- vided that care be taken in selecting appropriate methods. I have administered nitrous oxide and oxygen to patients with all the commoner forms of morbus cordis. Amonost these have been three cases of aortic regurgitation, one of advanced mitral and aortic disease, and one of congenital valvular disease (? pulmo- nary). In all of these cases excellent results were obtained, and no anxiety was experienced. Although nitrous oxide, as ordinarily adminis- tered, is generally regarded as safe even in advanced heart disease, I must confess that I prefer not to adopt the customary plan of administration in such subjects. The case is (juite different when nitrous oxide is given with oxygen, for the temporary impairment of respiration, with its consequent temporary general venous engorgement, is prevented, so that no undue strain is thrown upon the ric^ht side of the heart. I have notes of an