Horse Side Vet Guide ®

Equine Health Resource

Aorto-Iliac Thrombosis

Synonyms: Aorto-iliacofemoral Thrombosis

This is a poorly understood and uncommon condition in which a blood clot forms in a large artery supplying a hind limb. This results in the reduction or the total loss of circulation to one or both hind limbs. The signs are variable lameness that may be difficult to localize in a lameness exam.

In many cases, the affected limb will be cooler than the unaffected limbs. In some cases, a vet may be able to detect the clot on rectal palpation and, using ultrasound, detect the clot in one of the large ileal arteries within the pelvis.

Diagnosis is through clinical examination and ultrasound.

Treatment may be conservative or surgical .

Author: Doug Thal DVM Dipl. ABVP


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