title: Relation between tensile tests and compliance in polyester textile vascular prostheses.
abstract: BACKGROUND
  Compliance is one of the mechanical features of a vascular prosthesis (VP) that influences its performances. The goal of the present in vitro study was to attempt characterizing textile VP compliance through mechanical tests proposed in the standards.
  
  
  METHODS
  Three different models of commercially available knitted VP (P1, P2, and P3) were studied using longitudinal and circumferential traction tests on coated and uncoated samples. Five samples of each model were considered for each test. The Young modulus was then calculated to indirectly predict the longitudinal and radial compliance of the VP. Moreover, actual compliance was measured on a specific device that regulates the intraluminal pressure of a fluid maintained in the tested VP at 37°C. VP dilatation under pressure load was measured with a digital camera system.
  
  
  RESULTS
  The Young modulus variations from one VP to the other were compared with the differences between effective compliance values at radial, longitudinal, and volume level. Although the presented results show differences among the VP, one can observe that the graft materials' Young modulus and the compliance properties are linked together in general.
  
  
  CONCLUSIONS
  Although VPs are subjected to multidirectional stresses ex vivo, unidirectional standard mechanical tests, through the measurement of the materials Young modulus, can help predicting their compliance, however, in a limited frame.
authors.affiliation: Department of Vascular Surgery and Kidney Transplantation, Hôpitaux Universitaires de Strasbourg, Geprovas, Strasbourg, France.
authors.forename: Benoit
authors.initials: B
authors.lastname: Lucereau
authors.affiliation: Laboratoire de Physique et Mecanique Textiles, Université de Haute-Alsace, Mulhouse, France.
authors.forename: Foued
authors.initials: F
authors.lastname: Koffhi
authors.affiliation: Laboratoire de Physique et Mecanique Textiles, Université de Haute-Alsace, Mulhouse, France.
authors.forename: Frédéric
authors.initials: F
authors.lastname: Heim
authors.affiliation: Department of Vascular Surgery and Kidney Transplantation, Hôpitaux Universitaires de Strasbourg, Geprovas, Strasbourg, France.
authors.forename: Anne
authors.initials: A
authors.lastname: Lejay
authors.affiliation: Department of Vascular Surgery and Kidney Transplantation, Hôpitaux Universitaires de Strasbourg, Geprovas, Strasbourg, France.
authors.forename: Fabien
authors.initials: F
authors.lastname: Thaveau
authors.affiliation: Department of Physiology, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.
authors.forename: Bernard
authors.initials: B
authors.lastname: Geny
authors.affiliation: Department of Physiology, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.
authors.forename: Bernard
authors.initials: B
authors.lastname: Durand
authors.affiliation: Department of Vascular Surgery and Kidney Transplantation, Hôpitaux Universitaires de Strasbourg, Geprovas, Strasbourg, France.
authors.forename: Yannick
authors.initials: Y
authors.lastname: Georg
authors.affiliation: Department of Vascular Surgery and Kidney Transplantation, Hôpitaux Universitaires de Strasbourg, Geprovas, Strasbourg, France. Electronic address: nabil.chakfe@chru-strasbourg.fr.
authors.forename: Nabil
authors.initials: N
authors.lastname: Chakfé
mesh_terms: D001807:Blood Vessel Prosthesis; D003187:Compliance; D055119:Elastic Modulus; D006801:Humans; D008422:Materials Testing; D008962:Models, Theoretical; D011091:Polyesters; D011312:Pressure; D011474:Prosthesis Design; D013314:Stress, Mechanical; D013718:Tensile Strength; D013784:Textiles
chemical_list: D011091:Polyesters