Structural design and mechanical performance of composite vascular grafts

Abdul Wasy Zia, Rong Liu*, Xinbo Wu

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

17 Citations (Scopus)
147 Downloads (Pure)

Abstract

This study reviews the state of the art in structural design and the corresponding mechanical behaviours of composite vascular grafts. We critically analyse surface and matrix designs composed of layered, embedded, and hybrid structures along the radial and longitudinal directions; materials and manufacturing techniques, such as tissue engineering and the use of textiles or their combinations; and the corresponding mechanical behaviours of composite vascular grafts in terms of their physical–mechanical properties, especially their stress–strain relationships and elastic recovery. The role of computational studies is discussed with respect to optimizing the geometrics designs and the corresponding mechanical behaviours to satisfy specialized applications, such as those for the aorta and its subparts. Natural and synthetic endothelial materials yield improvements in the mechanical and biological compliance of composite graft surfaces with host arteries. Moreover, the diameter, wall thickness, stiffness, compliance, tensile strength, elasticity, and burst strength of the graft matrix are determined depending on the application and the patient. For composite vascular grafts, hybrid architectures are recommended featuring multiple layers, dimensions, and materials to achieve the desired optimal flexibility and function for complying with user-specific requirements. Rapidly emerging artificial intelligence and big data techniques for diagnostics and the three-dimensional (3D) manufacturing of vascular grafts will likely yield highly compliant, subject-specific, long-lasting, and economical vascular grafts in the near-future. Graphic abstract: [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)757-785
Number of pages29
JournalBio-Design and Manufacturing
Volume5
Issue number4
Early online date23 Aug 2022
DOIs
Publication statusPublished - Oct 2022

Keywords

  • Composite materials
  • Mechanical properties
  • Structural design
  • Surface design
  • Vascular grafts

ASJC Scopus subject areas

  • Biotechnology
  • Biomedical Engineering
  • Materials Science (miscellaneous)
  • Industrial and Manufacturing Engineering

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