INTRATRACHEAL IX.SU F F LATION 



129 



oncometer and close the abdomen with heinostats. Could 

 you do this in a living dog I Remove the oncometer and 

 put away all apparatus. Do not forget to wash out the 

 tubing connecting the carotid to the manometer. 



EXPERIMENT IX. 

 Intratracheal Insufflation. 



1. Study carefully the principles involved in the con- 

 struction of the apparatus shown in Fig. 122. A constant 



Fig. 122. Apparatus for intratracheal insufflation. The tip of the catheter should 

 toe cut off just back of the "eye." Any similar sized rubber tube may be used instead 

 of the catheter. The outer diameter of the tube should be about one-half (or a little 

 Jess than) that of the inner diameter of the trachea. 



current of air passes into the tube at the extreme right of 

 the picture. By turning the small lever on the side of the 

 ether valve, part or all (or none) of the air can be made to 

 pass over the ether and then out through the rubber 

 catheter at the left. (The cap and spout on the top of the 



