PRINCIPLES OF VETERINARY SURGERY 8] 



and both right iliacs were apparently normal on palpation in the living animal. 

 Dissection of the parts post-mortem disclosed an ovid aneurism of the aorta 

 at its quadrification, measuring four inches long, two and a half inches wide 

 and one and one-half inches thick. The left external iliac artery was com- 

 pletely obstructed with a firm connective tissue thrombus extending downward 

 fourteen inches into the femoral. The artery itself was degenerated to 

 less than one-half its normal diameter, and the thrombus was firmly ad- 

 hered to its walls. In fact it had become a part of the artery itself. The 

 connective tissue thrombus also occupied a part of the aneurism in the 

 aorta, and extended with small branches into all of the other iliacs, without 

 entirely occluding them. 



Hill reports the history of a Cavalry horse that suffered from an acute 

 fatal thrombosis of the popliteal artery. The attack was sudden and termi- 

 nated fatally after five days of excruciating suffering. The horse was found 

 suffering pain and unable to support weight on one hind leg, on the morning 

 inspection. Careful and repeated inspection and palpation of the leg failed 

 to disclose either the nature or the location of the affection, although the 

 lameness and systemic symptoms continued to increase in severity. On the 

 fifth day the patient, being in a dying condition, was killed and the examina- 

 tion post-mortem disclosed a thrombus of the popliteal artery. The report, 

 unfortunately, does not include a pathological nor anatomical description of 

 the abnormality. 



Analogous conditions are occasionally encountered in the 

 fore extremities of horses, but here the disease is generally 

 acute, and resembles attacks of lymphangitis until the in- 

 creasing gravity of the process reveals its true nature. In 

 the acute cases affecting the extremities, death supervenes 

 on the eighth to the tenth day, from pain, exhaustion, ab- 

 sorption of morbid products, fever, anorexia, etc., or else 

 the process terminates in an extensive gangrene that will 

 prove fatal at a later date. It is only the rare cases that 

 terminate- in chronic fibro-connective-tissue thrombosis, but 

 when this event does not occur it is through the influence of 

 the collateral vessels which undergo compensatory augmen- 

 tation soon after the principal one is obturated. 



Thromboses in other parts of the body, notably the par- 

 enchymatous organs, produce symptoms according to the 

 particular organ affected and the extent of the obstruction. 



TREATMENT. — The disease resulting from thrombosis 

 must b^'treated according to its nature and location. In the 

 limbs, baths, friction, massage and moderate exercise are the 



