Implantable device and delivery system to reestablish or maintain a bodily canal
First Claim
1. An implantable device intended to reestablish or maintain the normal passage cross section of a bodily canal comprising an elongate framework which can expand radially between a first, contracted state of reduced diameter and a second, expanded state in which it has a diameter substantially equal to the natural diameter of the bodily canal, wherein said framework has, when contracted, at least one element consisting of a wire wound on itself along a substantially circular or helical directrix line, wherein the wire constituting each element of said framework is made of a deformable metallic material with a weak shape memory, wherein the wire constituting each element of said framework is wound into a helical spring having coils that are substantially contiguous with one another when said framework is in the first, contracted state, and wherein said coils are spaced apart from one another when said framework is in the second, expanded state.
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Accused Products
Abstract
The subject of the present invention is an implantable device intended to reestablish or maintain the normal passage cross section of a bodily canal, of the type comprising an elongate framework which can expand radially between a first, contracted state of reduced diameter and a second, expanded state in which it has a diameter substantially equal to the natural diameter of said bodily canal and wherein said framework has, when contracted, at least one element consisting of a wire wound on itself, preferably with substantially constant pitch, along a substantially circular or helical directrix line.
125 Citations
22 Claims
- 1. An implantable device intended to reestablish or maintain the normal passage cross section of a bodily canal comprising an elongate framework which can expand radially between a first, contracted state of reduced diameter and a second, expanded state in which it has a diameter substantially equal to the natural diameter of the bodily canal, wherein said framework has, when contracted, at least one element consisting of a wire wound on itself along a substantially circular or helical directrix line, wherein the wire constituting each element of said framework is made of a deformable metallic material with a weak shape memory, wherein the wire constituting each element of said framework is wound into a helical spring having coils that are substantially contiguous with one another when said framework is in the first, contracted state, and wherein said coils are spaced apart from one another when said framework is in the second, expanded state.
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6. A system to reestablish or maintain the normal passage cross section of a bodily canal comprising:
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an implantable device comprising an elongate framework that can be expanded radially from a first, contracted state of reduced diameter to a second, expanded state in which it has a diameter substantially equal to the natural diameter of the bodily canal, wherein said framework has, when contracted, at least one element consisting of a wire wound on itself along a substantially circular or helical directrix line, and wherein the wire constituting each element of said framework is wound into a helical spring having coils that are substantially contiguous with one another when said framework is in the first, contracted state, and wherein said coils are spaced apart from one another when said framework is in the second, expanded state; and a means for expanding said framework. - View Dependent Claims (7, 8, 9, 10)
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- 11. An implantable device intended to reestablish or maintain the normal cross section of a passage within a body canal comprising a framework which can expand radially between a first, contracted state of reduced diameter and a second, expanded state in which it has a diameter substantially equal to the natural diameter of the body canal, wherein said framework has at least one element which, when in the first, contracted state, follows a primary winding that defines a three-dimensional initial configuration, said primary winding of said at least one element being configured into a secondary winding that defines a substantially cylindrical shape, wherein said primary winding has coils that are substantially contiguous with one another when said framework is in the first, contracted state, and wherein said coils are spaced apart from one another when said framework is in the second, expanded state.
- 18. An implantable device intended to reestablish or maintain the normal cross section of a passage within a body canal comprising a framework which can expand radially between a first, contracted state of reduced diameter and a second, expanded state in which it has a diameter substantially equal to the natural diameter of the body canal, wherein said framework has at least one element which, when in the first, contracted state, follows a primary winding that defines a helical curve, said primary winding of said at least one element being configured into a secondary winding that defines a second, substantially helical curve when said framework is in the first, contracted state, and that defines a larger diameter helical curve when said framework is in the second, expanded state, wherein said primary winding has coils that are substantially contiguous with one another when said framework is in the first, contracted state and wherein said coils are spaced apart from one another when said framework is in the second, expanded state.
Specification