SURGICAL TREATMENT OF CHRONIC ROARING —HEMIPLEGIA LARVNGIS. 353 



On the 22nd the external wound had closed. Discharge stil] 

 continued, but gradually diminished during the succeeding few days, 

 and disappeared a week later. 



On the 5th October exercise was commenced, a quarter of an 

 hour's walk being given every morning. During the first few days the 

 horse was seized with violent fits of coughing on leaving the stable. 



On the 7th it was exercised in the riding school. Roaring occurred 

 after a few minutes' exercise. Two days later it was again tried at a 

 trot ; in three minutes the test had to be given up, so severe was the 

 roaring. 



During the night of the 3rd November the respiration suddenly 

 became extremely difficult and asphyxia threatened. Tracheotomy 

 was therefore performed. 



Some days later the larynx was reopened. The seat of operation 

 was occupied by a contracting cicatrix, extending the entire depth of 

 the larynx. 



Remark. — I could relate a number of cases showing the value of 

 arytsenoidectomy, and the failure of other methods of operation. I 

 have chosen the most characteristic. Two horses belonging to one 

 owner, M. M — , treated by ablation of the arytaenoid, were both cured. 

 Two horses also belonging to one owner, M. S — , and treated in the 

 same way, were also quite cured. 



The true value of those other operations which have been so greatly 

 vaunted is shown by the results of Cases 50 and 51. With them one 

 may rely on ensuring the greatest possible chance of failure. 



