PRINCIPLES OF VETERINARY SURGERY 



341 



nomeiia and the appearance of an abscess at the affected 

 point. The collection points at the surface and discharges 

 an unhealthy liquid that is generally fetid, and if the body is 

 not removed the suppurating process will continue, the 

 tract will become fistulous and the wound will not cicatrize. 

 Incision and exploration of the fistulous tract then become 

 necessary to reach and remove the irritant body that perpet- 

 uates the purulent discharge. Cadeac thus cured a pleural 

 fistula in a horse by incising the external orifice and search- 

 ing for a foreign body in a partitioned pouch of the pleura, 

 which proved to contain a glass tube. It would require sev- 



FiG. 33. 

 Revolver Bullet in a Dog's Stifle (Radiograph). 



eral chapters to complete the studies of the various accidents 

 in animals caused by foreign bodies. Only the most fre- 

 quent ones can be considered, and those only in a general 

 way. 



In the dog and cat foreign bodies rather frequently lodge 

 in the mouth. Twine, thread or rubber bands sometimes 

 become knotted on the tongue and cause turtiefaction. Sav- 

 igny reports such a case as occurring in the hen. In the horse 

 and the ox they may lodge between the teeth, in the tongue, 

 in the internal face of the cheek and in the pharnyx, provok- 

 ing stomatitis, pharyngitis and more or less marked dys- 



