WOUNDS BY TEARING. I4I 
by the pharynx (7). In other cavities, if they remain, they may produce 
suppurative inflammation. ‘he biscaien that Rigot found in the gut- 
tural pouch of a horse, which he dissected, had given rise to a sup- 
purative collection in that sac. Many become fixed, or encysted, 
and after the wound which they have made has cicatrized, nothing: 
remains to indicate their presence. The observation of Trasbot is an 
example of it. At the autopsy of war-horses, balls were found enveloped 
in a cellulo-fibrous case in various regions, even in the viscera. Inman, 
they have been foundinthebrain. But there are projectiles, which, while 
remaining innocuous for years, travel along conjunctive layers, moving 
by the laws of gravity or through the effects of muscular contractions. 
In general, they move slowly, giving time for encysting to take place ; 
then, under the influence of the continued pressure that they make upon 
the dependent portion of their cystic envelope, the latter gives way, and 
the body thus progresses slowly through the tissues; the walls of the 
cyst close, unite, and form a fibrous tract, which may be found after- 
wards (Ferrier). Ina horse, which was wounded, in 1866, with a ball 
that had entered the lumbar region and could not be extracted, Moller 
found, ten years afterwards, the projectile near the umbilicus ; it had 
produced no trouble during all that time. Scmetimes, in thus displac- 
ing themselves, or even in remaining in one place, projectiles give rise, 
on occasions, to various accidents—abscesses, neuritis, arthritis, or in- 
flammation of the large serous membranes. The horse spoken of by 
Carnet, kept for four months, in the lumbar region, a ball which, one 
day, after a long journey, gave rise to an acute diffuse phlegmasia, and 
an abundant suppuration, followed by death in a week. (See Foreign 
Bodies. 
Ws 
WOUNDS BY TEARING. (TORN WOUNDS.) 
This kind of wound is observed in all animals; but with the excep~ 
tion of the wrenching of the hoof, most of them, generally of little gravity, 
have nothing compared with the great traumatisms, now so frequent. 
among men, because of the extensive part machinery takes in modern. 
industry. 
Ordinarily the torn wounds that we have to treat in animals. 
are made by nails or hooks, and are very much like contused 
wounds with a thin ischemic zone. Very often their edges are as. 
nearly regular as those of incised wounds; and when they are recent, if 
their borders are brought together after having been minutely cleaned 
of all soiling on their sutures, they may unite by first intention. This. 
() Quénu, Semaine Médicale, 1894, p. 328. 
