Iliac and femoropopliteal vascular occlusive disease treated with flexible tantalum stents

Abstract

Two hundred patients were treated with tantalum stents, 2 in the aortoiliac bifurcation, 114 in the iliac, and 84 in the femoropopliteal arteries. The indications for stenting were technically unsuccessful percutaneous transluminal angioplasty (PTA) due to arterial recoil, dissection (156 patients), or acute occlusions (15 patients). Long iliac artery occlusions (29 patients) were indications for primary stenting. Life-table analysis revealed a 3-year patency rate of 95% for stented iliac arteries, and a 1-year patency rate of 80% for stented femoropopliteal arteries. Restenosis of the stented femoropopliteal lumen was particularly frequent in stents placed for restenosis following prior PTA (7 of 12 patients), in stents placed into the distal superficial femoral and popliteal arteries (14 of 24 patients), and in stents positioned over a longer than 4-cm artery segment (9 of 16 patients). For the aortic bifurcation and iliac arteries, arterial stenting has proved to be a valuable adjunct to PTA; for femoropopliteal arteries, stenting should be restricted to acute arterial occlusions or severe residual stenosis following PTA.

Evaluation of maximum neointima proliferation and plaque morphology in iliac self-expanding nitinol stents with intravascular sonography.

“…The intra-and interobserver variability of our study was 4.9% (not significant) and 5 [7] have been reported. The Strecker stunt (Boston Scien tific), a balloon-expanthble stunt made of knit ted tantalum wire, is more flexible and elastic comparedwith the Palmaz stunt and has corn parable patency rates in iliac arteries [5,20].…”

“…Moreover, recently published data from animal investigations did not show significant differences regarding neointimal hyperplasia between the Palmaz stunt, Wallstent,andMemothermstuntin iliac arteries [31]. We acknowledgethat the number of stunts included in our investigation is rela tively small compared with the number of iliac arterial stunts in other studies [1, 4,5,7,19,21,22]. However, this is the first systematic in travascular sonography follow-up investiga tionof Memothermstunts to ourknowledge.…”

“…The Strecker stunt (Boston Scien tific), a balloon-expanthble stunt made of knit ted tantalum wire, is more flexible and elastic comparedwith the Palmaz stunt and has corn parable patency rates in iliac arteries [5,20]. The first self-expanding stunt used in clinical practice for treatment of iliac artery stenosis or occlusionwith a 2-yearpatencyrateof approx imately 90% is the Wallstent (Schneider, Zur ich, Switzerland), a flexible and compliant stunt made of multiple stainless steel filaments [4,21,22].…”

Plasma treatment effects on the tantalum Strecker stent implanted in femoral arteries of sheep

“…Results for femoral lesions [4][5][6], have been less favorable, being similar to results obtained for occlusions with balloon angioplasty alone Correspondence to: Prof. D. Crochet [7]. As indicated recently by Palmaz [8], experimental research must continue to define the factors that influence long-term patency of stents.…”

Die Angioplastie beim Verschluß der Arteria femoralis superficialis und der Arteria poplitea

“…Die Primär-und Langzeiterfolge der konventionellen Angiopla stie werden mit zunehmender Verschlußlänge geringer. Sie sind im Stadium der Claudicatio inlennittens besser als bei der kriti schen Ischämie [24]. Aus klinischer und morphologischer Sicht gilt: Die Früh-und Spätergebnisse der Katheterbehandlung sind um so besser, je kürzer das zu behandelnde Strombahnhindernis, und um so schlechter, je fortgeschrittener die arterielle Durch blutungsstörung ist.…”