36 External Iliac Angioplasty and Stent Insertion

CASE 36


Clinical Presentation


A 52-year-old male presented to his primary-care physician complaining of increasing lifestyle-limiting left thigh claudication. On physical exam he was noted to have a diminished left femoral artery pulse. He was then referred to the interventional radiology section for evaluation.



Figure 36-1 External iliac angioplasty and stent insertion. (A) Digital subtraction angiogram catheter occluding high-grade stenosis of left external iliac artery. (B) Digital subtraction angiogram performed via side-arm sheath shows high-grade stenosis of left external iliac artery (arrow). (C) Angiogram after angioplasty shows alleviation of stenosis with flow-limiting dissection. (D) Magnified view of C shows dissection (small arrows). (E) Final angiogram after stent insertion shows rapid antegrade flow through the treated lesion.


Radiologic Studies


Angiogram


The left common femoral artery was catheterized using the Seldinger technique, and a 6-French (F) sheath was inserted. A 5F pigtail catheter was advanced into the abdominal aorta to perform pelvic arteriography, which showed absent flow beyond the catheter into the distal left external iliac artery (Fig. 36-1A). The catheter was then removed and an arteriogram performed through the sheath revealed a > 90% stenosis of the external iliac artery (Fig. 36-1B).


Diagnosis


High-grade stenosis of the left external iliac artery causing left thigh claudication.


Treatment


Angioplasty and Stent Insertion


Five thousand units of heparin were administered intra-arterially. The lesion was crossed with a 0.035-inch Bentson guidewire (Cook, Bloomington, Indiana) and an 8- × 20-mm angioplasty balloon catheter was advanced to the site of stenosis and used to dilate the lesion. The angioplasty catheter was then removed leaving the guidewire across the lesion. An angiogram performed via the 6F sheath revealed resolution of the stenosis (Fig. 36-1C). However, a flow-limiting intimal dissection flap (Fig. 36-1D) was noted, and pressure measurement across the lesion revealed a residual gradient of 12 mm Hg. An 8- × 60-mm self-expanding stent (Wallstent, Boston Scientific, Natick, Massachusetts) was then advanced over the guidewire to the site of the dissection and deployed. It was then dilated with the angioplasty balloon catheter used earlier. Follow-up arteriography showed rapid antegrade flow through the external iliac artery (Fig. 36-1E); the dissection flap had been tacked down by the stent. A strong left common femoral pulse was noted.

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Jan 8, 2016 | Posted by in INTERVENTIONAL RADIOLOGY | Comments Off on 36 External Iliac Angioplasty and Stent Insertion
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