US Patent 12102521 Crimped textile graft with polymer liner

A vascular prosthesis includes an outer crimped textile graft and an inner polymeric liner. The polymeric liner is secured to the valleys of the crimps of the textile graft while leaving the peaks of the textile graft free of the liner. The polymeric liner is impermeable to blood flow. The inner liner may include expanded polytetrafluoroethylene polymer, and the graft may include polyethylene terephthalate yarns.