Abstract 12392: Optimal Balloon Size in Post-Stenting Angioplasty for Aortoiliac Occlusive Disease (AIOD) With Self-Expandable Nitinol Stent
Introduction: Although the self-expandable nitinol stent is considered to be dilated by radial force in chronic phase after endovascular treatment (EVT), the optimal post-stenting angioplasty has remained unclear, especially in the aortoiliac occlusive disease (AIOD), over size post-stenting angioplasty has the possibility of causing postoperative complications. The aim of this study is to evaluate the optimal post-stenting angioplasty for AIOD.
Methods: From a multicenter registry of 2097 consecutive patients with AI disease between January 2005 and December 2009, 273 consecutive patients (288 lesions, male 80%; mean age 73± 9 years) who underwent EVT for AIOD with self-expandable stents were retrospectively analyzed. We divided them into two groups ; Large balloon size group (the difference between diameter of stents and post-stenting angioplasty (ΔS-P) ≦1mm ) and Small balloon size group (ΔS-P ≧2mm). Outcome measures were primary, assisted primary and secondary patency and postoperative complications which included vessel dissection, blue toe syndrome, and distal embolism.
Results: Mean follow up period was 26.7 ±17.9 months. At 1, 2 and 3 years, there were significant differences between two groups in primary patency (99.0%, 97.4% and 95.1% vs. 92.0%, 85.3% and 85.3%, p = 0.01) and assisted primary patency (100%, 98.4% and 96.0% vs 93.1%, 88.7% and 88.7%, p =0.02). However, secondary patency (99.0%, 99.0% and 99.0% vs. 98.8%, 98.8% and 98.8%, p = 0.94) and postoperative complications (2.08 % vs. 1.72%, p = 0.18) were similar. After adjustment for age≦75 and other outflow lesion, ΔS-P ≦1 was an independent predictor of both primary patency and assisted primary patency.
Conclusions: Post-stenting angioplasty aimig at the stents diameter improved primary and assisted primary patency, whereas the postoperative complications did not increase. The optimal post-stenting angioplasty for AIOD may use the self-expandable nitinol stents diameter.
Author Disclosures: S. Tohoku: None. Y. Soga: None. Y. Tomoi: None.
- © 2014 by American Heart Association, Inc.