Valve prosthesis for implantation in body channels
First Claim
1. A method for treating a native aortic valve in a human heart, comprising:
- advancing an expandable member to a position within the native aortic valve, the native aortic valve having at least two valvular leaflets;
dilating the native aortic valve by expanding the expandable member to push aside the valvular leaflets of the native aortic valve;
collapsing the expandable member and withdrawing the expandable member from the native aortic valve;
advancing a prosthetic valve to a position within the dilated native aortic valve, the prosthetic valve being radially compressed during the advancement; and
radially expanding the prosthetic valve within the dilated aortic valve, wherein the expanded prosthetic valve maintains the native aortic valve in the dilated condition and replaces the valvular function of the native aortic valve.
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Accused Products
Abstract
A valve prosthesis which is especially useful in the case of aortic stenosis and capable of resisting the powerful recoil force and to stand the forceful balloon inflation performed to deploy the valve and to embed it in the aortic annulus, comprises a collapsible valvular structure and an expandable frame on which said valvular structure is mounted. The valvular structure is composed of physiologically compatible valvular tissue that is sufficiently supple and resistant to allow the valvular structure to be deformed from a closed state to an opened state. The valvular tissue forms a continuous surface and is provided with strut members that create stiffened zones which induce the valvular structure to follow a patterned movement in its expansion to its opened state and in its turning back to its closed state.
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Citations
20 Claims
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1. A method for treating a native aortic valve in a human heart, comprising:
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advancing an expandable member to a position within the native aortic valve, the native aortic valve having at least two valvular leaflets;
dilating the native aortic valve by expanding the expandable member to push aside the valvular leaflets of the native aortic valve;
collapsing the expandable member and withdrawing the expandable member from the native aortic valve;
advancing a prosthetic valve to a position within the dilated native aortic valve, the prosthetic valve being radially compressed during the advancement; and
radially expanding the prosthetic valve within the dilated aortic valve, wherein the expanded prosthetic valve maintains the native aortic valve in the dilated condition and replaces the valvular function of the native aortic valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for treating a native valve in a human heart, comprising:
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advancing an expandable balloon to a position within the native valve, the native valve having at least two valvular leaflets;
dilating the native valve by inflating the balloon to push aside the valvular leaflets;
deflating the balloon and withdrawing the balloon from the native valve;
advancing an expandable prosthetic valve to a position within the dilated native valve, the prosthetic valve including a valvular structure coupled to an expandable frame; and
radially expanding the prosthetic valve within the dilated native valve, wherein an outer surface of the expandable prosthetic valve engages the leaflets of the native valve and the expandable prosthetic valve replaces the function of the native valve. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method of implanting a prosthetic valve in a heart for treating valvular aortic stenosis, comprising:
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providing a first elongate catheter having an expandable balloon disposed along a distal end portion thereof;
positioning the balloon within an aortic valve by manipulation of the first elongate catheter;
expanding the balloon to dilate the aortic valve;
collapsing the balloon and withdrawing the first elongate catheter through the aorta;
providing a second elongate catheter having an expandable prosthetic valve disposed along a distal end portion thereof;
advancing the second elongate catheter through the aorta toward the dilated aortic valve;
deploying the prosthetic valve within the dilated aortic valve; and
withdrawing the second elongate catheter through the aorta.
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Specification