68 M \ i . youatt’s veterinary lectures. 
as you recede from that spot above or below, or is it did’used 
over a considerable portion of the trachea ? 
You would, I think, bleed, purge, and most certainly blister. 
Your ear will guide you to the part to which the blister should 
be applied. The physic having set, you would commence a 
course of fever medicines; you would consider it as a case of 
chronic inflammation, and to be subdued, not by excessive de¬ 
pletion, but by the continuance of moderate depletory measures. 
You would probably bleed again in less quantity ; give a second 
dose of physic, and most certainly blister again, or keep the blis¬ 
ter discharging by some stimulating unguent. The degree of 
success which attends these measures would guide you in pursu¬ 
ing them further. If no relief is obtained after a fortnight or 
three weeks, you would ponder on another mode of treatment. 
You would again carefully explore the whole extent of the tra¬ 
chea, and if you could yet refer the rattle or wheezing to the 
same point, you would boldly propose tracheotomy^ for you would 
certainly cut upon the seat of disease. 
If you found one of these organized bands, the removal of it 
would aflbrd immediate relief; and if you found merely a thick¬ 
ened membrane, no harm would be done; or the loss of blood 
might abate the local inflammation. You will recollect what 
was said in a former lecture of the manner in which the opera¬ 
tion of tracheotomy should be performed. You should not per¬ 
fectly cut through a single ring, much less two or three; for if 
you do, the arch of the trachea will be destroyed, and it will 
there assume a sharper, roof-like shape in that place: the cali¬ 
bre of the tube will be materially lessened there: and if you 
should perchance remove one cause of roaring, you will assuredly 
produce another, and that a remediless one. Once more look at 
these trachege on which the operation has been performed, and 
see the altered shape of the tube and the, certain production of 
roaring. If a portion only of two of the rings is excised, the re¬ 
maining part of each will be sufficiently strong to retain the per¬ 
fect arch-form of the trachea, and without impairment of the 
calibre. 
Of the manner of introducing a tube into the trachea, in cases 
of much obstruction, I have already spoken. On the whole, you 
will not eagerly undertake a case of roaring ; but, having under¬ 
taken it, you will give the measures that you may adopt a fair 
trial, remembering that, in every chronic case like this, the only 
hope of success depends on your perseverance. 
