Bioresorbable vascular implant having homogenously distributed stresses under a radial load

摘要

A bioresorbable vascular implant for implantation in a bodily lumen has a tubular framework and includes one or more annular support members. Each of the one or more annular support members includes a plurality of struts interconnected by a hinge region. Each of the plurality of struts also includes a mid-section. The vascular implant also includes at least one viscoelastic material that enables transition of the vascular implant between a collapsed configuration and an expanded configuration. Each of the plurality of struts and the hinge region defines a cross-section. The moment of inertia increases from the mid-section towards the hinge region to accommodate the transition and resist a radial load applied to the vascular implant in the expanded configuration.

主权项

1. A bioresorbable vascular implant having a tubular framework and being for implantation in a bodily lumen, said vascular implant comprising:
one or more annular support members, each of said one or more annular support members including a plurality of struts interconnected by a hinge region having a width, each of said plurality of struts including a mid-section having a width; wherein said vascular implant is comprised of at least one viscoelastic material that enables transition of said vascular implant between a collapsed configuration and an expanded configuration, each of said plurality of struts and said hinge region defining a cross-section; wherein the moment of inertia increases from each said mid-section towards each said hinge region to accommodate said transition and resist a radial load applied to said vascular implant in the expanded configuration; wherein the width of each of said plurality of struts tapers substantially continuously from each said hinge region to each said mid-section; and wherein stresses between said mid-section of said plurality of struts and said hinge region are evenly distributed under application of the radial load to said vascular implant in the expanded configuration.