Elastic stent graft

US11116621B2 · kind B2 · utility

Assignee

• W.L. Gore & Associates GmbH · DE

Inventors

• Edward H. Cully · Flagstaff, US
• Jeffrey B. Duncan · Flagstaff, US
• Ryan D. Kariniemi · Cokato, US
• Thomas E. Kariniemi · Flagstaff, US
• Jeffrey J. Kustusch · Flagstaff, US
• Jared Nelson · Buford, US

Key dates

• Filing date: Feb 22, 2018
• Grant date: Sep 14, 2021
• Expiry date: Aug 20, 2039

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2002/072
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A stent graft including a stent having a wall having at least one opening, an outer surface, and an inner surface and a covering of a composite material having a least one expanded fluoropolymer membrane and an elastomer is provided. The cover can be used to cover the outer and/or the inner surface of the stent. The expanded fluoropolymer membrane contains serpentine fibrils. In exemplary embodiments, the fluoropolymer is polytetrafluoroethylene. The composite material may be axially and/or circumferentially wrapped around the stent. The composite material is fold-free throughout its operating diameter range and exhibits a sharp increase in stiffness at a predetermined diameter. The stent graft can be designed to have a stop point in either a radial or axial direction. The stent graft can advantageously be implanted undersized with respect to a nominal diameter without having material infolding.