title: Radial force measurement of endovascular stents: Influence of stent design and diameter.
abstract: OBJECTIVE
  Angioplasty and endovascular stent placement is used in case to rescue the coverage of main branches to supply blood to brain from aortic arch in thoracic endovascular aortic repair. This study assessed mechanical properties, especially differences in radial force, of different endovascular and thoracic stents.
  
  
  METHODS
  We analyzed the radial force of three stent models (Epic, E-Luminexx and SMART) stents using radial force-tester method in single or overlapping conditions. We also analyzed radial force in three thoracic stents using Mylar film testing method: conformable Gore-TAG, Relay, and Valiant Thoracic Stent Graft.
  
  
  RESULTS
  Overlapping SMART stents had greater radial force than overlapping Epic or Luminexx stents (P < 0.01). The radial force of the thoracic stents was greater than that of all three endovascular stents (P < 0.01).
  
  
  CONCLUSIONS
  Differences in radial force depend on types of stents, site of deployment, and layer characteristics. In clinical settings, an understanding of the mechanical characteristics, including radial force, is important in choosing a stent for each patient.
authors.affiliation: Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan takum@surg2.med.kyushu-u.ac.jp.
authors.forename: Takuya
authors.initials: T
authors.lastname: Matsumoto
authors.affiliation: 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: 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: 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: Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: Jun
authors.initials: J
authors.lastname: Okadome
authors.affiliation: Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: Koichi
authors.initials: K
authors.lastname: Morisaki
authors.affiliation: Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: Kentarou
authors.initials: K
authors.lastname: Inoue
authors.affiliation: 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: Kirameki Project Career Support Center, Kyushu University Hospital, Fukuoka, Japan.
authors.forename: Tomoko
authors.initials: T
authors.lastname: Ohkusa
authors.affiliation: 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: D001013:Aorta, Thoracic / Q000503:physiopathology / Q000601:surgery*; D001807:Blood Vessel Prosthesis; D019917:Blood Vessel Prosthesis Implantation / Q000295:instrumentation*; D057510:Endovascular Procedures / Q000295:instrumentation*; D006439:Hemodynamics; D006801:Humans; D008422:Materials Testing; D008955:Models, Cardiovascular; D011474:Prosthesis Design; D012039:Regional Blood Flow; D015607:Stents; D013314:Stress, Mechanical
keywords: Endovascular stent; radial force; thoracic stent graft