J Korean Soc Radiol.  2012 Jun;66(6):519-526. 10.3348/jksr.2012.66.6.519.

Comparison of a Nitinol Stent versus Balloon Angioplasty for Treatment of a Dysfunctional Arteriovenous Graft

• Yoon YC
• Shin BS
• Ahn M
• Park MH
• Ohm JY
• Kim HJ

• KMID: 1439468
• DOI: http://doi.org/10.3348/jksr.2012.66.6.519

Abstract

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.

MeSH Terms

Alloys
Angioplasty
Angioplasty, Balloon
Humans
Male
Medical Records
Renal Dialysis
Retrospective Studies
Stents
Transplants
Alloys

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