title: Geometrical factors influencing the hemodynamic behavior of the AAA stent grafts: essentials for the clinician.
abstract: Endovascular aneurysm repair (EVAR) is considered to be the treatment of choice for abdominal aortic aneurysms (AAA). Despite the initial technical success, EVAR is amenable to early and late complications, among which the migration of the endograft (EG) with subsequent proximal endoleak (Type Ia) leads to repressurization of the AAA sac, exposure to excessive wall stress, and, hence, to potential rupture. This article discusses the influence that certain geometrical factors, such as neck angulation, iliac bifurcation, EG curvature, neck-to-iliac diameter, and length ratios, as well as iliac limbs configuration can exert on the hemodynamic behavior of the EGs. The information provided could help both clinicians and EG manufacturers towards further development and improvement of EG designs and better operational planning.
authors.affiliation: Department of Vascular Surgery, University Hospital of Alexandroupolis, "Democritus" University of Thrace, Alexandroupolis, Greece, efstratiosgeorg@gmail.com.
authors.forename: Efstratios
authors.initials: E
authors.lastname: Georgakarakos
authors.forename: Christos
authors.initials: C
authors.lastname: Argyriou
authors.forename: Nikolaos
authors.initials: N
authors.lastname: Schoretsanitis
authors.forename: Chris V
authors.initials: CV
authors.lastname: Ioannou
authors.forename: Nikolaos
authors.initials: N
authors.lastname: Kontopodis
authors.forename: Robert
authors.initials: R
authors.lastname: Morgan
authors.forename: Dimitrios
authors.initials: D
authors.lastname: Tsetis
mesh_terms: D017544:Aortic Aneurysm, Abdominal / Q000601:surgery*; D001696:Biomechanical Phenomena; D001783:Blood Flow Velocity / Q000502:physiology; D001807:Blood Vessel Prosthesis; D019917:Blood Vessel Prosthesis Implantation / Q000295:instrumentation*; D057867:Endoleak / Q000517:prevention & control; D057510:Endovascular Procedures; D005548:Foreign-Body Migration / Q000517:prevention & control; D006439:Hemodynamics / Q000502:physiology*; D006801:Humans; D007083:Iliac Artery / Q000033:anatomy & histology; D011183:Postoperative Complications / Q000517:prevention & control*; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012307:Risk Factors; D015607:Stents