THROMBOSIS OF THE ILIAC ARTERIES IN THE HORSE. 387 



face the vessel showed two ulcerations, the smaller about one sixth of 

 an inch in length, resembling a scratch with the finger-nail. Its 

 margins were sinuous and of irregular outline; this injury extended 

 almost through the entire thickness of the arterial wall. The other 

 ulceration, which, like the preceding, occupied the dorsal surface of the 

 vessel, offered the same characters, but was larger (five sixths of an 

 inch in length and one sixth in breadth), and was ruptured through its 

 base. Through this orifice the haemorrhage had occurred. 



No atheromatous change could be detected in the posterior, nor in 

 the common aorta. 



THROMBOSIS OF THE ILIAC ARTERIES IN THE HORSE. 



98. Six-year-old well-bred saddle and harness horse, first seen on 

 July 24th, 1894. 



History. — Had been purchased about two years previously, had 

 always seemed healthy, and had carried a rider through Yeomanry 

 exercises. For three weeks afterwards seemed in good health. Re- 

 ported as having " something seriously wrong with its back " on July 

 24th, after being driven in harness. Had then been quickly brought 

 home. 



State on Examination. — Was " blowing," sweating profusely over 

 the entire body, and showed a swelling — as if from local cramp — under 

 the saddle; movement stiif ; pulse increased, but no fever. The disease 

 — diagnosed as a mild attack of azoturia — was treated by hot fomenta- 

 tions and administration of a purgative. 



Complete recovery in a few days. The horse was, however, only 

 exercised, carefully dieted, and for a time kept under observation. A 

 few days after again returning to light work it showed some difficulty 

 in moving the right hind leg, began to blow and go stiff, and was 

 brought home. The above treatment again resulted in recovery. The 

 above circumstances recurred twice, but on the next occasion Mr. 

 Rutherford was called in, and found the animal in precisely the same 

 condition as on July 24th, but with the addition to its symptoms of 

 very marked irregularity of the heart's action, from which he concluded 

 there was obstruction to the aortic circulation. The animal was 

 rested, the cardiac difficulty disappeared, and the horse was sent to a 

 prospective buyer on trial, but was returned, having failed to complete 

 its first journey. The alarming symptoms then developed disappeared 

 in a day, but the horse was noticed to pass very little urine, the cardiac 

 irregularity had returned, and the hind limbs remained cold below the 

 hocks in spite of bandaging. The appearance and appetite were good ; 

 temperature normal. 



On September nth Mr. Rutherford had the horse ridden, at first 

 at a walk ; it showed no symptoms. When trotted, however, it 

 faltered on the right hind limb, over which it lost control before it had 

 gone 500 yards. The pace was at once slowed to a walk, but after a 

 few yards more the left leg became involved, the animal began to blow 

 and show distress, and had great difficulty in covering the remaining 

 sixty yards to its stable, walking in a crouching manner "as if the fore 



