Korean J Radiol.  2001 Sep;2(3):145-150. 10.3348/kjr.2001.2.3.145.

A Newly Designed Nitinol Stent: Early Clinical Experience in the Treatment of Iliac Artery Stenoses and Occlusions

• Yoon CJ
• Chung JW
• Park JH
• Hong SH
• Song SY
• Lim HG
• Lee YS

• KMID: 754099
• DOI: http://doi.org/10.3348/kjr.2001.2.3.145

Abstract

OBJECTIVE
To investigate the effectiveness of the newly designed Niti-S stent in the management of iliac arterial stenoses and occlusions. MATERIALS AND METHODS: Stenoses (n=25) or occlusions (n=5) in the iliac arteries of 25 patients (30 limbs) were treated. The site of the lesions was the common (n=15) or external (n=11) iliac artery, or both (n=4). Eight limbs were treated for diffuse disease, six for highly eccentric lesion, five for occlusive lesion, and 11 for failed angioplasty. RESULTS: In all patients, technical success was achieved without major complications. One death, not procedure-related, occurred within 30 days. Ankle-brachial indexes improved from 0.63 +/- 0.30 to 0.99 +/- 0.21, and ischemic symptoms showed improvement in 22 patients (88%). Fontaine classifications before stenting, namely IIa(n=3), IIb(n=16), III(n=2), and IV(n=4) improved to I(n=17), IIa(n=5), and IV(n=3). Follow-up over a 27 (mean, 19.8 +/- 8)-month period showed that cumulative patency rates were 95.8% at 1 year and 86.2% at 2 and 3 years. No significant decrease in the mean ankle-brachial index was observed. CONCLUSION: The Niti-S stent appears to be a safe and effective device for the treatment of iliac stenoses and occlusions. These preliminary results require confirmation with a larger series.

Keyword

Arteries, iliac; Arteries, stenosis or obstruction; Stents and prostheses

MeSH Terms

Aged
*Alloys
Arterial Occlusive Diseases/*therapy
Equipment Design
Female
Human
*Iliac Artery
Male
*Stents
Support, Non-U.S. Gov't

Figure

• 

  Fig. 1 The Niti-S consists of a monofilament nitinol wire wound on the mandrel in such a way that a series of interlacing wires creates a spiral mesh around its circumference. The distance between bends is approximately 2mm, and both ends of the wire are connected at the central portion of the stent (arrow). The leading and trailing ends of the stent are coated with platinum, which helps identify them and facilitates deployment (curved arrows).

• 

  Fig. 2 A. Pelvic angiogram obtained in a 68-year-old insulin dependent diabetic man with left-sided Fontaine stage-IIb claudication shows segmental occlusion of about 8cm involving the left common iliac artery, with opacification of the external iliac artery and numerous collateral channels. The translesional mean pressure gradient was 50 mmHg. B. Angiogram obtained after primary stent placement shows good patency of a previously occluded segment, and there is no residual pressure gradient across the lesion. During follow-up lasting 23 months, the patient was free of symptoms.

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