Anæsthetics : a practical handbook / by J. Blumfeld.

  • Blumfeld, James Edward, 1856-
Date:
1906
Catalogue details

Licence: In copyright

Credit: Anæsthetics : a practical handbook / by J. Blumfeld. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    Fit the face-piece very accurate]}' to the face, turn on oxygen and nitrous oxide so that each bag is about one- third full. When breathing is quite regularly and fully performed, turn the indicator so that nitrous oxide with 2 per cent, oxygen is at once admitted. Keep working the foot-key of the gas-cylinder so that the tension of the oxygen and nitrous oxide bags is equal throughout. Increase the percentage of oxygen so that cyanosis to any marked degree is not permitted, and clonos does not arise. The more robust the patient, the less the proportion of oxygen required to secure the best anassthesia. Muscular twitching or clonic movements are indica- tions for increasing, excitement, or a condition approach- ing apnoea, for diminishing, the percentage of oxygen. The signs of anaesthesia are : Regular softly-snoring respiration. Absent conjunctival reflex—medium-sized pupils. Flaccid muscles—the arms drop limply if raised. Fixed or slightly oscillating eyeballs. Gas and oxygen is particularly well suited to children, middle-aged and elderly thin women, anaemic persons, the subjects of heart disease with broken compensation ; it is not advisable for very muscular, alcoholic, very fat, and excitable patients. When employing gas and oxygen for any but the shortest operations the anaesthetist should always have ready apparatus for administration of the more powerful anaesthetics, in case the gas and oxygen prove insufficient. Nasal Administration of Nitrous Oxide For dental operations requiring a longer anaesthesia than can be secured by the above methods, nitrous
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