Variable depression stents (VDS) and billowing graft assemblies
AssigneeAortic Innovations Surena, LLC
InventorAli Shahriari
Life of this patent
Estimating the term…
Abstract
A stent assembly includes support rings each having interconnected circumferentially alternating inner prongs and outer prongs. The inner prongs define an inner diameter around a longitudinal axis. The outer prongs define an outer diameter greater than the inner diameter. A graft engages the support rings and follows a waving peripheral path. The graft may be a billowing graft. A second graft may surround the first graft such that tunnels are defined between the first graft and second graft. A method of making a stent assembly includes diametrically expanding the support rings onto a mandrel, engaging a graft with the support rings, and removing the support rings and graft from the mandrel permitting the stent assembly to contract to a neutral state.
Claims28
A stent assembly comprising:
- a first support ring having interconnected circumferentially alternating first inner prongs and first outer prongs, the first inner prongs defining a first inner diameter around a central longitudinal axis, and the first outer prongs defining a first outer diameter around the central longitudinal axis greater than the first inner diameter;
- a second support ring spaced from the first support ring along the central longitudinal axis, the second support ring having interconnected circumferentially alternating second inner prongs and second outer prongs, the second inner prongs defining a second inner diameter around the central longitudinal axis, and the second outer prongs defining a second outer diameter around the central longitudinal axis greater than the second inner diameter;
- longitudinal channels defined between an inner prong of the first support ring and an inner prong of the second support ring;
- a billowing graft engaging at least a portion of one or more of the first support ring and the second support ring, the billowing graft when in a relaxed state follows a waving peripheral path along the longitudinal channels at least partially around at least one of the first support ring and second support ring, wherein the billowing graft engaging the first support ring and the second support ring at about the longitudinal channels creates longitudinal grooves, wherein at least two of the longitudinal grooves extend in a direction that is parallel to a direction of a central axis extending along a length of the stent assembly,
- wherein the at least two of the longitudinal grooves extend between the first support ring and the second support ring and define an outwardly extending planar shelf between the at least two of the longitudinal grooves and along a length of the billowing graft.
A prosthetic device for treatment of abdominal aortic aneurysms in a patient, comprising:
- a main body formed from a plurality of circumferentially extending wires and configured for being received in an abdominal artery of the patient, the circumferentially extending wires defining one or more longitudinally extending channels and the graft covering member billowing outwardly and away from the longitudinally extending channels to contact aortic tissue along an exterior of the graft covering member when blood flows along a central fluid flow channel defined within the main body, wherein engagement of the one or more longitudinally extending channels with the graft covering member forms one or more respective, longitudinal grooves adjacent each longitudinally extending channel, wherein at least two of the one or more longitudinal grooves define an outwardly extending planar shelf along a length of the billowing graft.
Dependencies are inferred from the claim text.