Conformal expansion of prosthetic devices to anatomical shapes
First Claim
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1. A mechanical apparatus for radially expanding a prosthetic device in a conduit or orifice of a human body, the apparatus comprising:
- an expansion device having a main axis and an outer mounting surface having a first configuration for mounting the prosthetic device in a crimped state thereon, the expansion device comprising a plurality of rigid, single piece shape-forming members angularly arranged around the main axis and each having a three-dimensional external surface, wherein the combination of the external surfaces collectively defines a longitudinal profile for the outer mounting surface that varies along its axial length in the first configuration, andan axially moveable shaft configured to cam the shape-forming members radially outwards and convert the outer mounting surface from the first configuration to a larger second configuration, wherein the combination of the external surfaces collectively defines, perpendicular to a main axis of the expansion device when in the second configuration, a non-circular shape at a first axial location and a circular cross-section at a second axial location, and expand the prosthetic device to an expanded state having a longitudinal profile that varies along its axial length and conforms to the shape of the conduit or orifice.
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Abstract
A system for expanding a device in a conduit or orifice of a human body includes an expansion device that is movable from a first configuration to a second configuration. External surfaces of the expansion device can collectively have a non-cylindrical cross-section relative to a main axis of the expansion device, such that the external surfaces of the expansion device generally conform to the anatomical shape of the conduit or orifice when the expansion device is in the second configuration.
343 Citations
20 Claims
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1. A mechanical apparatus for radially expanding a prosthetic device in a conduit or orifice of a human body, the apparatus comprising:
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an expansion device having a main axis and an outer mounting surface having a first configuration for mounting the prosthetic device in a crimped state thereon, the expansion device comprising a plurality of rigid, single piece shape-forming members angularly arranged around the main axis and each having a three-dimensional external surface, wherein the combination of the external surfaces collectively defines a longitudinal profile for the outer mounting surface that varies along its axial length in the first configuration, and an axially moveable shaft configured to cam the shape-forming members radially outwards and convert the outer mounting surface from the first configuration to a larger second configuration, wherein the combination of the external surfaces collectively defines, perpendicular to a main axis of the expansion device when in the second configuration, a non-circular shape at a first axial location and a circular cross-section at a second axial location, and expand the prosthetic device to an expanded state having a longitudinal profile that varies along its axial length and conforms to the shape of the conduit or orifice. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A mechanical apparatus for radially expanding a prosthetic device in a conduit or orifice of a human body, the apparatus comprising
an expansion device having a main axis and an outer mounting surface having a first configuration for mounting the prosthetic device in a crimped state thereon, wherein the expansion device comprises a plurality of rigid, single piece shape-forming members angularly arranged around the main axis and each having an external surface, wherein the combination of the external surfaces defines the outer mounting surface and a longitudinal profile for the outer mounting surface that varies along its axial length in the first configuration, and an axially moveable shaft configured to displace the shape-forming members radially outwards and convert the outer mounting surface from the first configuration to a larger second configuration and expand the prosthetic device to an expanded state having a longitudinal profile that varies along its axial length and conforms to the shape of the conduit or orifice, wherein in the first configuration, the shape-forming members at the outer mounting surface are in contact with each other along circumferentially-adjacent sides, and in the second configuration the circumferentially-adjacent sides of the shape-forming members at the outer mounting surface are spaced apart from each other and the plurality of external surfaces define a longitudinal profile that varies along its axial length.
Specification