Fig. 31.—Allis Inhaler.
Fig. 32.—Fowler Inhaler.
Fig. 33.—Juillard Mask.
The anesthetic may be administered with the aid of various masks or inhalers. Simplicity of construction is to be preferred to more complicated apparatuses. The aseptic metal inhaler of Allis ([Fig. 31]) or the folding form of the same modified by Fowler ([Fig. 32]), are much used in the United States, while the Juillard mask—a metal frame covered with several thicknesses of gauze—is used abroad. (See [Fig. 33].)
It is to be remembered that in operations about the face ether anesthesia is not practicable, owing to the repeated lifting of the mask which allows the patient too much air. It can only be given by specially constructed inhaling devices, which are more easily used with chloroform or the mixed anesthetics. Their specific use and construction will be referred to later.
Combined Anesthesia
It is often desirable to get the patient as quickly as possible under anesthesia and still overcome the depleting effects of chloroform narcosis. A common method to accomplish this is to give chloroform to the point of relaxation and with a change of inhaler continue with ether. In this way anesthesia can be kept up safely a long time with a minimum amount of ether. There are, however, a number of mixtures used in place of this interchange of anesthesia, all having their particular merit. Some of the best known are: