| Bridging stent-graft pullout force analysis. | |
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MedLine Citation:
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PMID: 21521056 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Abstract Purpose: To assess the pullout force (POF) of bridging stent-grafts used in thoracoabdominal stent-grafts and iliac bifurcated grafts. Methods: In an experimental setup, the POFs of Viabahn or Fluency with or without a Zilver stent were measured when deployed into the renal and celiac branches of a Zenith thoracoabdominal cuff-bearing branched stent-graft. The POFs of the Atrium i-Cast, Viabahn, Fluency, and Fluency+Zilver were measured when deployed into an iliac bifurcated graft with a short side-branch for the internal iliac artery. At least 10 trials were performed for each stent in air at room temperature. Results: The median POF (IQR; absolute range) required to dislodge each bridging stent-graft from the 6-mm renal branch was 1.89 N (0.47 N; 1.65-2.5) for the 7-mm Viabahn, 1.17 N (0.39 N; 0.68-1.57 N) for the 7-mm Fluency, and 2.08 N (0.49 N; 1.59-2.62 N) for the 7-mm Fluency with a supporting 8-mm Zilver stent (p<0.001). For the 8-mm celiac branch, the POFs were 2.79 N (0.82 N; 2.31-4.16 N), 1.74 N (0.18 N; 1.51-1.91 N), and 2.73 N (0.94 N; 1.9-3.61 N) for the 9-mm Viabahn, 9-mm Fluency, and 9-mm Fluency with a 10-mm Zilver stent, respectively (p<0.001). For the 8-mm internal iliac branch, the POFs were 3.53 N (0.85 N; 2.55-4.72 N) for the 9-mm i-Cast, 3.82 N (0.41 N; 3.29-4.45 N) for the 9-mm Viabahn, 2.32 N (0.23 N; 1.63-2.64 N) for the 9-mm Fluency, and 2.61 N (0.71 N; 1.65-3.63 N) for the 9-mm Fluency with a 10-mm Zilver stent (p<0.001). Conclusion: There is a small but significant difference in pullout forces among various bridging stent-grafts. As pullout forces may be one factor contributing to type III endoleaks in complex endovascular repairs involving fenestrated and branched stent-grafts, further study is warranted to compare these grafts clinically to determine if they perform differently. According to this study, the theoretical advantages associated with the Viabahn stent-graft make it a strong choice for minimizing branch dislocations. |
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Authors:
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Jeffrey Grenville; Kong T Tan; Leonard W Tse; Dheeraj K Rajan; Thomas F Lindsay |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of endovascular therapy : an official journal of the International Society of Endovascular Specialists Volume: 18 ISSN: 1545-1550 ISO Abbreviation: J. Endovasc. Ther. Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-04-27 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100896915 Medline TA: J Endovasc Ther Country: United States |
Other Details:
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Languages: eng Pagination: 161-8 Citation Subset: IM |
Affiliation:
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Division of Interventional Radiology, Department of Medical Imaging, Toronto General Hospital, Toronto, Ontario, Canada. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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