432 PHLEBITIS. 



If the pin is removed at once, the wound is found open, 

 red, moist with purulent matter, and very irritable. There 

 is a tendency to hsemorrhage, and at other times to coagula- 

 tion of the blood in the jugular upwards towards the head, 

 for the blood becomes stagnant up to the first large collateral 

 branch. Though losing a vein is a serious result, it is, so 

 far as the life of the animal is concerned, not so dangerous 

 as ulceration into the vein, and introduction of pus into the 

 blood. Death, as the result of phlebitis, usually depends on 

 the formation of abscesses internally, from the penetration of 

 pus into the open vein. 



Treatment. Care must be exercised in tampering with 

 the pin. We know that metallic substances do not irritate, 

 and it is best to begin with not disturbing the part much, 

 but to foment freely, keep the animal quiet, and give an 

 active dose of cathartic medicine. If suppuration comes on, 

 the pin must be removed, to permit of the escape of the pus, 

 and having protected the wound by a layer of lard around it 

 a blister of cantharides ointment must be applied over a sur- 

 face as large as the palm of the hand. This may be repeated, 

 and is usually sufficient to treat the case. Low diet and 

 salines must be persevered with until the phlebitis is fairly 

 overcome. 



Occasionally both veins are attacked, from a horse having 

 been bled on both sides almost simultaneously. Death very 

 frequently results; and if both veins are obstructed, though 

 life is saved, the animal is well nigh worthless. 



VENOUS OBSTRUCTIONS MEGEIMS. 



There are many cases which may lead to impediments to 



the flow of blood in the veins the most common results 



from an adhesive phlebitis affecting one or more veins. It 



is in the jugular vein of the horse that such obstructions 



