Charles T. Hennemeyer MD, Abstract Co-Author: Nothing to Disclose

Antoinette Susan Gomes MD, Presenter: Nothing to Disclose

The purpose of this study is to describe our experience using Onyx for embolization of a variety of vascular lesions.

Thus far 17 patients have undergone embolotherapy using Onyx 18. There were 9 males and 8 females with a mean age of 35 years. Eleven patients were under 30 years old. Nine patients had congenital vascular malformations, 8 of which were low flow venous malformations, and 3 high flow lesions. Two patients had intrahepatic artery to portal vein fistulae, 2 had intrauterine fistulae, and one patient had an aortic endoleak. Delivery of the embolic material was through either one of two routes: transcatheter arterial delivery, or direct image guided percutaneous injection. Ten patients received Onyx by transcatheter embolization technique, 7 received direct injection. An average of one to five cc of embolic material was used.

Onyx was safely delivered with no complications. Five patients (30%) had follow-up studies after a period of 6-20 months. All follow-up examinations showed durable Onyx embolization of vessels. Onyx delivery was found to be more controllable than delivery of other liquid or particulate agents. Less perioperative pain was encountered with the use of Onyx. A limitation was the necessity to use slower injections in order to obtain deep penetration into the nidus in high flow lesions.

Onyx is a useful permanent embolic agent in the management of a variety of peripheral and visceral vascular lesions.

Onyx is a useful permanent embolic agent in the managment of a variety of peripheral vascular lesions. Its delivery is more controllable than delivery of other liquid or particulate agents.

Hennemeyer, C, Gomes, A, Embolotherapy of Peripheral and Visceral Vessels Using Ethylene Vinyl Alcohol Copolymer (Onyx).  Radiological Society of North America 2007 Scientific Assembly and Annual Meeting, November 25 - November 30, 2007 ,Chicago IL. http://archive.rsna.org/2007/5014569.html