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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    essential in deciding upon the particular lines of treatment which should be adopted in anaes- thetising patients by the method now under consideration. In the preceding Chapter we discussed the plan which should be followed in dealing with those types of subjects most commonly met with. We have now to consider what modi- fications in that plan are advisable when anaesthetising patients of other types. Sex and age. — In anaesthetising small children, more oxygen than usual may be admitted. Should crying take place, it is best to commence the administration with the indicator at 8, g or 10 ; for the crying tends to introduce an asphyxial element. I have anaesthetised two or three children of three years of age by means of the mixture, but with moderate success only, the anaesthesia being very transient in such small subjects. In older children the indicator may usually be placed at 3 or 4 to commence with, and moved on rather more quickly than usual to 5, 6, &c. By the time 10 is reached, the breathing will probably have become so tranquil that some doubt as to the presence of anaesthesia may be felt ; the indicator should therefore now be turned back to 5, *' 4, or even 3, when snoring will be certain to com- mence. In this way a more satisfactory anaes-