236 THE PRACTICE OF VETERINARY MEDICINE. 



the jugular, use the animal carefully for some time after the 

 acute symptoms have subsided, and do not turn out on 

 pasture, as depression of the head will soon be followed by 

 mechanical congestion. Where one vein becomes obliter- 

 ated the corresponding vein of the opposite side becomes 

 enlarged, and takes on the function to a certain extent of 

 the one destroyed. In examining as to soundness, test the 

 jugulars, raising first one and then the other ; obliteration 

 of a jugular vein constitutes unsoundness, but is not a 

 matter of imi^ortance in a city-bred horse. In making an 

 examination as to a horse's soundness, it is also usual to 

 raise the jugulars to ascertain whether the animal has ever 

 been bled for any illness. 



Thrombus. — As before stated, this condition is sometimes 

 mistaken for the more serious one of phlebitis, but is, in 

 comparison to phlebitis, a very trivial condition. It is 

 usually caused by improper closure of the wound, etc. 



Sywjitoms. — There is observed more or less swelling in 

 the neiojhbourhood of the wound, but the swellincj is of a 

 circumscribed character, and is movable, in contradistinc- 

 tion to the swelling of phlebitis, which is immovable, and 

 more or less diffused. The constitutional symptoms present 

 in phlebitis are absent in this condition. The swelling is 

 caused by the exudation of a small amount of blood into 

 the areolar tissue. This exudation is from the jugular vein, 

 and takes place in from twelve to twenty-four hours after 

 the wound is made, while the swelling of phlebitis does not 

 appear for three or four days. 



Treatment. — Eemove the pin, and allow the blood and 

 pus, if any of the latter be present, to escape, after which 

 cleanse, and treat as indicated. 



Injuries to the Neck. — The veterinarian often meets with 

 a bruised or lacerated condition of the tissues in the region 

 of the neck, caused by the bite of a vicious horse. The 



