350 CLINICAL VETERINARY MEDICINE AND SURGERY. 



In September, 1897, M. M — sent me the following report : 

 " Since operation the horse has worked very well. In warm 

 weather the roaring sound still occurs, but to a very trifling extent, and 

 does not prevent the horse being perfectly ' workable.' " 



55. A ten-year-old Dutch mare, belonging to M. S — , 6, Rue Dieu, 

 Paris, affected with chronic roaring, which appeared to have developed 

 after bronchitis. Left in hospital 20th October, 1895. 



The roaring was noticed when the animal first returned to work 

 after illness, and gradually became more marked despite internal treat- 

 ment. The animal could still be worked, but respiration was difficult, 

 and dyspnoea continually appeared imminent. 



Trotted in the riding school the mare roared loudly. By con- 

 tinuing for a few minutes longer dyspnoea was produced ; the flank 

 movements were very rapid, the nostrils widely dilated; inspiration 

 was painful, and the appearance of the face anxious. Nothing 

 abnormal was found on examining the nasal cavities, larynx, and 

 trachea. 



Operation on the 22nd October. The parts having been prepared 

 the lower surface of the larynx and the first tracheal ring were incised. 

 On dilating the wound paralysis of the left arytenoid was detected. 

 The cartilage was removed, the parts dressed with gauze, double 

 muscular and cutaneous sutures inserted, and the animal was placed in 

 a box without litter. The evening temperature was 38*7° C. 



Next day the dressing and cannula were removed ; the muscular 

 layers were united to the skin on each side by three interrupted 

 sutures. Litter was again provided. Food and drink were given as 

 usual after operation. Temperature, morning 38*3° C, evening 



38-5° C. . . . 



During the following days a portion of the drinking-water and 

 fragments of food mixed with saliva returned through the nostrils and 

 operation wound. Feeding was interrupted by attacks of coughing. 

 Temperature, morning 38'2° C, evening 38-9° C. 



On the ist November the difficulty in swallowing had disappeared. 

 The laryngeal wound was covered with granulations and reduced in 

 length to one half. Neither food nor liquid escaped by it. Adminis- 

 tration of iodide of potassium was commenced. On the 15th the 

 wound had closed. The animal left hospital on the 24th November. 



Result. — At the commencement of December the mare returned to 

 work. A little whistling was then noticed at a trot. By June, 1896, 

 this had disappeared even at the fastest paces. Nothing more than 

 rather loud respiration could be detected. There was no roaring 

 sound, nor was the respiration in any wise impeded. 



56. A nine-year-old Hungarian horse, belonging to M. S — , 6, Rue 

 Dieu, Paris, suffering from chronic roaring. Left in hospital 24th 

 September, 1896. 



Had been in M. S — 's possession for five months. The roaring 

 varied in intensity from time to time. Occasionally there was cough- 

 ing and slight whitish, frothy discharge from both nostrils. M. S — 



