UNSUCCESSFUL OPERATION FOR ROARING. 
329 
sion was far more important than anticipated, the blood es¬ 
caping in almost a continuous stream, and increasing rather 
than decreasing in flow for several hours, necessitating the 
retention of the tampon canula in the trachea for some twenty- 
four hours. Otherwise, the animal progressed apparently 
well, ate promptly and readily as soon as food was allowed, 
and was returned to the owner, turned to grass and the 
wound property attended to. 
For some weeks everything seemed favorable, and a cure 
was definitely anticipated, but after ten or twelve weeks it 
became apparent that the animal was retrograding.and that 
the operation was largely a failure. He gradually grew 
worse, and was finally returned to us, in March, 1890, for ex¬ 
amination, and if advisable, for further operation, being at that 
time fully as bad as before treatment. 
Upon external examination we found that the tracheal 
rings included in our original incision had collapsed, the tra¬ 
chea being flattened out transversely so that its sides were 
almost in contact, and its channel nearly occluded. This de¬ 
fect we decided to remedy by inserting a permanent silver 
trachea tube in the collapsed portion, and when opening the 
trachea for applying the tube, the larynx was examined by 
means of the electric lamp, and although it looked quite con¬ 
stricted, the right arytaenoid cartilage was still active. 
The trachea tube failed, however, to relieve the dyspnoea, 
and the insertion of a tracheotomy tube was rendered imper¬ 
ative. After waiting long enough to fully determine that the 
dyspnoea was essentially laryngeal and insurmountable, the 
animal was destroyed and the larynx carefully removed and 
preserved. 
Besides the aforementioned collapsed tracheal rings which 
offer nothing special in volume or consistence, there was noted 
a narrowing, especially from side to side, of the inferior laryn¬ 
geal opening, and a well-marked, almost osseous hypertrophy 
of the cricoid cartilage throughout its entire extent, being 
quite unyielding and fully three-quarters of an inch in diame¬ 
ter at the sides, where the thickening is most marked. 
The superior laryngeal opening was also considerably con- 
