CLOSED METHOD OF ANESTHESIA 



What is the action of N 2 on the heart? Is the anesthesia 

 deepened? 



4. After a sufficient time open the side clip from the pan 

 and empty out the mixed gases. Close the clip and run 

 in some fresh oxygen. Take some more normal record 

 and then from a Gebauer ethyl chloride tube inject through 

 the outlet tube of the pan a small amount of ethyl chloride. 



Fig. 121. The animal was anesthetized with nitrous oxide. At the point indicated 

 a little ethyl chloride was given (in addition to the nitrous oxide). The much more 

 marked action of ethyl chloride on the blood-pressure and respiration is seen at once. 



Do not give too much. How does this affect the blood- 

 pressure and respiration? Is the anesthesia deepened? 

 Which is the more powerful, ether or ethyl chloride? 

 Empty out the ethyl chloride and allow the anesthesia to 

 become fairly light. 



5. Repeat No. 4, using ethyl bromide, "somnoform" or 

 Brugg's mixture instead of ethyl chloride. Do not give 



