THE OPERATION FOR ROARING. 



8 s 



sheath on the burr shaft away from the burr for the distance 

 of about I cm. Press the burr gently against the bottom of 

 the ventricle, hold the canula to prevent its revolving, and 

 give the burr one or two turns to the right until the re- 

 sistance indicates that the mucosa is securely engaged. 

 The canula is now pushed against the burr and gentle 

 traction applied to the handle, revolving the burr and canula 



1 



Fig. 4. Fig. 5. 



Laryngeal dilator. Ventricular burr, modified 



after Blattenberg. 



now and then a trifle, until the everted mucosa from the 

 bottom of the ventricle appears beyond the mouth of the 

 ventricle. Grasp the everted portion of the muco.sa securely 

 with the long curved dressing forceps and then continue 

 traction with these until the ventricular mucosas has been 

 completely everted. Then cut away the everted mucosa by 

 excising it with the razor-shaped scalpel or by means of 



