[Intravascular treatment of iliac aneurysms]

We investigated the feasibility of the intravascular treatment of iliac aneurysms in patients at high perioperative risk.

January, 1996, to December, 1997, seven iliac aneurysms in 5 patients were treated using endovascular procedures. The patients were 4 men and 1 woman whose mean age was 70 years (range: 61-74 years). Four of 7 aneurysms were in the common iliac artery (2 true aneurysms and 2 anastomotic aneurysms after aortoiliac bypass) and 3 were true internal iliac artery aneurysms. Preoperative CT and arteriography were performed in all cases to define the vascular morphology of the aneurysm, including its exact diameter and length. All procedures were performed in the operating room by a team of vascular radiologists and vascular surgeons, using a portable digital RX system (Philips BV29). The femoral approach was always used, which was percutaneous under local anesthesia in 4 cases and surgical under epidural anesthesia in the other 3 cases, according to the patient's general condition and to common femoral artery morphology. Six endovascular Passager grafts were positioned in the common iliac artery using over-the-wire techniques; platinum coil embolization of the aneurysmatic internal iliac artery had been performed in 2 cases. Coil embolization of the hypogastric artery aneurysm was the only treatment in 1 case. Bilateral aneurysms were treated separately, at intervals of no less than 3 months.

Immediate aneurysm exclusion was obtained in all cases, as confirmed at 2-20 months' follow-up in 6 cases. A displaced prosthesis needed reoperation in 1 case. No complications were observed during or early after the procedures, which were always well tolerated by the patients.

The endovascular treatment of iliac aneurysms is a relatively recent procedure and thus only short- and mid-run results are currently available, which appear satisfactory in 85% of the world's literature cases. Prosthesis displacement and intimal hyperplasia are reported as the main causes of failure. Lacking long-term results, we reserve this method to selected cases. Shorter hospitalization is another advantage.

This little invasive procedure appears suitable for high-risk patients and in the aneurysmatic complications metachronous to surgical bypass.