1002 DISEASES AND THEIR TREATMENT. 



lessness in pinning it up, as in pulling the skin out, allowing 

 blood to filtrate the cellular tissues, bringing the edges unevenly 

 together, or, as in cases we have known, pinning the vein itself to 

 the skin. Certain states of constitutional predisposition of the 

 veins to take on inflammatory action are said to exist. 



Symptoms. It is easily distinguished by the inverted edges 

 of the wound, which are red and swollen, and discharge thin 

 serum, which soon gives place to pus. The vein above the inci- 

 sion is hard, hot, and tender, and considerably enlarged. The 

 swelling extends upward to the head ; the inflammation extends 

 to the surrounding tissues; the side of the neck is swollen; the 

 neck is stiff, and the head extended. The systematic fever runs high. 



Treatment. The head should be tied up, and almost constant 

 fomentations of hot water applied for several days. The lips of 

 the wound should be touched with the cautery or lunar caustic. 

 A full dose of purgative medicine should be given. When the 

 acute fever has subsided, it should be blistered throughout its en- 

 tire extent, and repeated if required, the head being kept elevated, 

 and his feed placed within his reach. 



These cases often terminate in complete obliteration of the 

 vein ; but in course of time the smaller vessels of the neck enlarge, 

 and take the place of the lost jugular. He is not suited to be 

 turned to pasture, as the head is apt to swell. He can never after 

 be passed as a sound horse. 



THROMBUS. 



Thrombus is the name given to a round tumor which some- 

 times occurs around the puncture made in bleeding. 



Causes. It is usually the result of pinning up the wound by 

 drawing the skin out, allowing the blood to be extravasated into 

 the cellular tissues; also from the opening in the skin not being 

 opposite the opening in the vein, or too small to allow the blood 

 to escape freely ; often from the tissues being irritated by repeated 

 striking of the fleam, or " perhaps from spontaneous inflammation 

 and serous effusion in the divided integuments and membranes 

 themselves." 



Symptoms. It is easily recognized by the appearance of a 

 round full swelling surrounding the opening a short time after 

 bleeding. 



