Williams' operation Against roaring in horses 351 



rent must in some way be prevented. To this end, -various 

 operations have been performed, the first of which was the 

 total resection of the affected cartilage (arytenoidectomy) ; 

 but as serious complication always supervened sooner or 

 later it was soon discontinued by each surgeon who elected 

 to adopt it as the treatment of roaring horses. Later, aryte- 

 noidorrhaphy, which consists of suturing the arytenoid car- 

 tilage to the inner surface of the thyroid, was attempted, and 

 for a time seemed to give fair results. Experience, however, 



Fig. 170 — Dorsal Position Required in the Performance o£ Laryngeal 



Operations. 



soon relegated this procedure to disuse, chiefly on account of 

 its uncertainty. .More recently partial resection of the aryte- 

 noid was employed without sufficient success to merit adop- 

 tion. To these might be added resection of the vocal chord 

 on the affected side, bilateral resection of the vocal chords 

 and cricotomy, all of which have been proven useless. 



Today the operation of Williams is attracting the most 

 attention. Statistics to date indicate that it is more effectual 

 than any of the methods previously employed, although it is 

 by no means without fault, nor without its failures. 



