TRACHEOTOMY. 



477 



Gig. 419.— The Sutures are in Place ; tHree are necessary. 



foreign bodies, excessive granulations of the cicatrix, pyemia, 

 tetanus, besides those which result from the division of the carti- 

 laginous structure, such as deformity of the tracheal rings, and 

 the contraction of the tracheal diameter. 



TEACHEOTOMY. 



This term represents an operation consisting in making a 

 methodic opening of varying dimensions, in the cervical position 

 of the trachea, in order to provide a free channel for the atmos- 

 pheric air into the respiratory tract. Its ultimate object is either the 

 removal of foreign bodies, or of the abnormal growth from the 

 larynx, or to facilitate the passage of the air necessary to respira- 

 tion. Its subjects are principally the large domestic animals, more 

 especially the horse, and it has also been employed with advantage 

 on ruminants, and often successfully on dogs. 



