title: Radial forces of stents used in thoracic endovascular aortic repair and bare self-expanding nitinol stents measured ex vivo - Rapid rescue for obstruction of the innominate artery using bare self-expanding nitinol stents.
abstract: Purpose Our objective was to compare the radial forces of several stents ex vivo to identify stents suitable for rescue of the unexpected coverage of aortic arch branches in thoracic endovascular aortic repair. Methods We measured the radial forces of two types of self-expanding bare nitinol stents (E-luminexx and Epic) used singly or as double-walled pairs, and of three endoprostheses used in thoracic endovascular aortic repair (TEVAR, Gore c-TAG, Relay, and Valiant) by compressing the stent using an MTS Instron universal testing machine (model #5582). We also examined the compressive effects of the TEVAR endoprostheses and the bare nitinol stents on each other. Results The radial force was greater in the center than at the edge of each stent. In all stents tested, the radial force decreased incrementally with increasing stent diameter. The radial force at the center was two times greater when using two stents than with a single stent. In the compression test, only E-luminexx used as a pair was not compressed after compressing a Relay endoprosthesis by 12 mm. Conclusion Two E-luminexx stents are appropriate to restore the blood flow if a TEVAR endoprosthesis covers the innominate artery following innominate-carotid-left subclavian arterial bypass.
authors.affiliation: 1 Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: Takuya
authors.initials: T
authors.lastname: Matsumoto
authors.affiliation: 1 Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: Kentaro
authors.initials: K
authors.lastname: Inoue
authors.affiliation: 1 Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: Shinichi
authors.initials: S
authors.lastname: Tanaka
authors.affiliation: 1 Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: Yukihiko
authors.initials: Y
authors.lastname: Aoyagi
authors.affiliation: 1 Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Matsubara
authors.affiliation: 1 Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Matsuda
authors.affiliation: 1 Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: Keiji
authors.initials: K
authors.lastname: Yoshiya
authors.affiliation: 1 Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Yoshiga
authors.affiliation: 2 Center for Clinical and Translational Research, Kyushu University, Fukuoka, Japan.
authors.forename: Tomoko
authors.initials: T
authors.lastname: Ohkusa
authors.affiliation: 1 Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Maehara
mesh_terms: D000368:Aged; D000497:Alloys; D001013:Aorta, Thoracic / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D017545:Aortic Aneurysm, Thoracic / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D001027:Aortography / Q000379:methods; D019917:Blood Vessel Prosthesis Implantation / Q000295:instrumentation*; D016122:Brachiocephalic Trunk / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D000072226:Computed Tomography Angiography; D057510:Endovascular Procedures / Q000295:instrumentation*; D006801:Humans; D008422:Materials Testing; D011474:Prosthesis Design; D012039:Regional Blood Flow; D015607:Stents; D013314:Stress, Mechanical
chemical_list: D000497:Alloys; C013616:nitinol
keywords: Radial force measurement; TEVAR endoprostheses; self-expanding bare nitinol stents