CLOSED METHOD OF ANESTHESIA 



then inject a small amount of ethyl chloride vapor. This is 

 best done with a Gebaner tube as shown in the picture but 

 other containers which may be used are also in the market 

 (Fig. 54). If ampoules are used the neck should be filed 

 a little and then the entire neck end of the ampoule is in- 

 serted like a cork (air tight) into the rubber tube going into 

 the bottle. The outlet is opened and the neck of the ampoule 

 is snapped off by bending the tube. The ethyl chloride is 

 very volatile and at once rushes into the bottle. Wait a lit- 

 tle while for the drug to act. It generally acts fairly rap- 

 idly but may require a little time for diffusion through the 

 bottle and absorption into the animals' blood. How do the 

 symptoms compare with those produced by ether or chloro- 

 form? How long does it take to produce complete anesthe- 

 sia ! If you add oxygen as needed, how long can you keep up 

 this anesthesia with one dose of ethyl chloride? Do not give 

 more etliijl chloride than is absolutely necessary or you may 

 kill one or both of the animals. "Somnoform" or Brugg's 

 mixture may be used also if the drugs are available (they 

 can be bought from dental supply houses and are put up in 

 ampoules). Similarly ethyl bromide may be used. A *i<ill 

 quantity of this may be poured into the bottle through a 

 funnel. Save all animals used until next dav and observe if 



V 



any permanent injury has been done to them. 



EXPERIMENT VIII. 



The Closed Method of Anesthesia. For Ether, Chloroform, 



Ethyl Chloride, Ethyl Bromide, (Nitrous Oxide), 



' ' Somnof orm, " etc., with Oxygen. Student 



Method. (Dogs or Cats.) 



1. Observe carefully the construction of the apparatus 

 shown in Fig 116. Arrange the table for operative work 

 as shown in Fig. 117, but omit the ether bottle, substituting 

 therefor the apparatus shown in the illustration. Into the 



