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KMID : 1103720120660060519
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Journal of the Korean Society of Radiology
2012 Volume.66 No. 6 p.519 ~ p.526
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Comparison of a Nitinol Stent versus Balloon Angioplasty for Treatment of a Dysfunctional Arteriovenous Graft
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Yoon Yeo-Chang
Shin Byung-Seok
Ahn Moon-Sang
Park Mi-Hyun
Ohm Joon-Young
Kim Ho-Jun
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Abstract
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Purpose: This study aimed to 1) evaluate the outcome of placing a nitinol stent for treating dysfunctional arteriovenous grafts (AVG), and 2) compare the results with those of successful balloon angioplasty.
Materials and Methods: Between February 2008 and October 2011, we retrospectively reviewed the interventional data and medical records of 29 patients (21 men, 8 women; mean age, 67.4 years) who underwent interventional procedures for dysfunctional AVG. Stents were placed only in cases with inadequate angioplasty results. Stent patency was evaluated and compared to cases of successful balloon angioplasty using the Kaplan-Meier analysis.
Results: Eleven stents and 18 angioplasties were performed successfully at the venous anastomotic site of AVG. The primary patency at 3, 6, 12, and 18 months did not differ significantly for stent placement and angioplasty (52%, 29%, 15%, 15% vs. 71%, 50%, 34%, 34%; mean survival, 164 vs. 253 days, p = 0.283). Secondary patency of the stent also did not differ significantly from angioplasty (80%, 80%, 49%, 49% vs. 76%, 57%, 57%, 36%; mean survival, 405 vs. 385 days, p = 0.553).
Conclusion: Nitinol stent placement was effective for treating dysfunctional AVG, but did not improve the primary and secondary patency compared to successful angioplasty.
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KEYWORD
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Stents and Prostheses , Arteriovenous Grafts , Hemodialysis
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