Implantable valve prosthesis for treating venous valve insufficiency
First Claim
1. A valve prosthesis comprising:
- a valve scaffold having a coil shape of consecutive windings with open spaces therebetween, wherein the valve scaffold is formed from a first material selected from one of a shape memory material and a resilient material; and
a backflow barrier that is a flap of a second material attached along a first edge to the valve scaffold and having an opposing second edge free of the valve scaffold, the second material being different from the first material, wherein the valve prosthesis is operable to alternate between an open configuration wherein the consecutive windings of the valve scaffold form a frustoconical coil shape and the backflow barrier allows blood flow through the open spaces between consecutive windings of the valve scaffold, and a closed configuration wherein the consecutive windings of the valve scaffold are collapsed such that the valve prosthesis has a substantially flat profile and the backflow barrier covers the open spaces of the collapsed valve scaffold to prevent blood flow through the valve prosthesis.
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Accused Products
Abstract
A valve prosthesis for percutaneous placement within a vein is disclosed that includes a valve scaffold and a backflow barrier. The valve scaffold is of a shape memory or resilient material and the backflow barrier is a flap of flexible material attached to the valve scaffold. The valve prosthesis is operable to alternate between open and closed configurations in response to changes in retrograde blood flow pressure. In the open configuration, the valve scaffold has a frustoconical coil shape of consecutive windings with open spaces therebetween and the backflow barrier allows antegrade blood flow through the open spaces. In the closed configuration, the consecutive windings of the valve scaffold are collapsed such that the valve scaffold has a substantially flat profile and the backflow barrier covers the opens spaces of the flattened valve scaffold to prevent retrograde blood flow from leaking there through.
104 Citations
12 Claims
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1. A valve prosthesis comprising:
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a valve scaffold having a coil shape of consecutive windings with open spaces therebetween, wherein the valve scaffold is formed from a first material selected from one of a shape memory material and a resilient material; and a backflow barrier that is a flap of a second material attached along a first edge to the valve scaffold and having an opposing second edge free of the valve scaffold, the second material being different from the first material, wherein the valve prosthesis is operable to alternate between an open configuration wherein the consecutive windings of the valve scaffold form a frustoconical coil shape and the backflow barrier allows blood flow through the open spaces between consecutive windings of the valve scaffold, and a closed configuration wherein the consecutive windings of the valve scaffold are collapsed such that the valve prosthesis has a substantially flat profile and the backflow barrier covers the open spaces of the collapsed valve scaffold to prevent blood flow through the valve prosthesis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification