Principles and practice of operative dentistry . uld be allowed by nitrous oxide ansesthesia, sulphuric ether is thesafest and best anaesthetic that can be employed. This substance may be administered by means, of a cone () formed of a towel or a folded news-paper, in which a napkin has been foldedor a sponge has been placed and securedwith an ordinary pin or a napkin or sponge is saturated withether, care being taken not to put on somuch as to cause it to drip upon the faceof the patient. It is then slowly advancedto the face of the patient, allowing plentyof air to be i
Principles and practice of operative dentistry . uld be allowed by nitrous oxide ansesthesia, sulphuric ether is thesafest and best anaesthetic that can be employed. This substance may be administered by means, of a cone () formed of a towel or a folded news-paper, in which a napkin has been foldedor a sponge has been placed and securedwith an ordinary pin or a napkin or sponge is saturated withether, care being taken not to put on somuch as to cause it to drip upon the faceof the patient. It is then slowly advancedto the face of the patient, allowing plentyof air to be inspired with the ether vaporuntil the air-passages become accustomedto the irritation and the tendency to coughhas passed away. It may then be broughtclose to the face and all air excluded ex-cept that which passes through the openend of the cone and through the sponge or over the surface of the this way the patient receives a sufficient amount of oxygen to supportthe functions of life, while at the same time the air is thoroughly im-. Towel done up as a cone. 670 QPEEAlIYE DEXTISTEY. pregnated with the ether vapor, and the patient is rapidly brought underits influence. The irritation of the air passages and the tendency to coughand strangle may be entirely obviated by beginning the ansesthesia withnitrous oxide gas. The apparatus devised by Sir Frederick Hewitt fornitrous oxide-ether anaesthesia is probably the best for this purpose. Various forms of inhalers have been introduced from time to time forthe administration of ether, the best of which are the Lente (Fig. 657) andthe Allis (Fig. 658). The Lente inhaler is a cone made of sheet brass, fitted with a rubberair-cushion around the edge to exclude the air from entering between thecone and the face, while the upper end has an opening fitted with a cork-stoppered tube large enough to admit sufficient air. When in use thecone is lined with a piece of sheet lint or cotton, held in place by a pieceof wire or whalebone
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectdentist, bookyear1920
