Valve prosthesis fixation techniques using sandwiching
First Claim
1. Apparatus comprising a prosthesis for implantation at a native semilunar valve of a native valve complex of a subject, the native valve complex having semilunar sinuses and native commissures, the prosthesis comprising:
- a distal fixation member, configured to be positioned in a downstream artery of the subject selected from the group consisting of;
an ascending aorta, and a pulmonary trunk, and shaped so as to define exactly three strut supports and exactly three proximal engagement arms, wherein each engagement arm is connected to and extends between two of the strut supports, wherein the engagement arms are configured to be positioned at least partially within respective ones of the semilunar sinuses, and, in combination, to apply, to tissue that defines the semilunar sinuses, a first axial force directed toward a ventricle of the subject; and
a proximal fixation member coupled to the distal fixation member, the proximal fixation member configured to be positioned at least partially on a ventricular side of the native semilunar valve, and to apply, to the ventricular side of the native valve complex, a second axial force directed toward the downstream artery, such that application of the first and second forces couples the prosthesis to the native valve complex;
wherein at least one of the engagement arms includes a local trough at a proximal, upstream portion of the engagement arm.
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Accused Products
Abstract
A prosthesis is provided for implantation at a native semilunar valve of a native valve complex. The prosthesis includes a distal fixation member, configured to be positioned in a downstream artery, and shaped so as to define exactly three proximal engagement arms that are configured to be positioned at least partially within respective ones of semilunar sinuses, and, in combination, to apply, to tissue that defines the semilunar sinuses, a first axial force directed toward a ventricle. The prosthesis further includes a proximal fixation member coupled to the distal fixation member, the proximal fixation member configured to be positioned at least partially on a ventricular side of the native semilunar valve, and to apply, to the ventricular side of the native valve complex, a second axial force directed toward the downstream artery, such that application of the first and second forces couples the prosthesis to the native valve complex.
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Citations
22 Claims
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1. Apparatus comprising a prosthesis for implantation at a native semilunar valve of a native valve complex of a subject, the native valve complex having semilunar sinuses and native commissures, the prosthesis comprising:
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a distal fixation member, configured to be positioned in a downstream artery of the subject selected from the group consisting of;
an ascending aorta, and a pulmonary trunk, and shaped so as to define exactly three strut supports and exactly three proximal engagement arms, wherein each engagement arm is connected to and extends between two of the strut supports, wherein the engagement arms are configured to be positioned at least partially within respective ones of the semilunar sinuses, and, in combination, to apply, to tissue that defines the semilunar sinuses, a first axial force directed toward a ventricle of the subject; anda proximal fixation member coupled to the distal fixation member, the proximal fixation member configured to be positioned at least partially on a ventricular side of the native semilunar valve, and to apply, to the ventricular side of the native valve complex, a second axial force directed toward the downstream artery, such that application of the first and second forces couples the prosthesis to the native valve complex; wherein at least one of the engagement arms includes a local trough at a proximal, upstream portion of the engagement arm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. Apparatus comprising a prosthesis for implantation at a native semilunar valve of a native valve complex of a subject, the prosthesis comprising:
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a distal fixation member, configured to be positioned in a downstream artery of the subject selected from the group consisting of;
an ascending aorta, and a pulmonary trunk, and to apply, to native commissures of the native semilunar valve, a first axial force directed toward a ventricle of the subject, without applying any force to native leaflets of the native semilunar valve, and wherein the distal fixation member is configured to rotationally align with the native semilunar valve; anda proximal fixation member coupled to the distal fixation member, the proximal fixation member configured to be positioned at least partially on a ventricular side of the native valve complex, and to apply a second axial force directed toward the downstream artery, such that application of the first and second forces couples the prosthesis to the native valve complex by axially sandwiching the native valve complex from a downstream side and the ventricular side thereof, upon implantation of the prosthesis wherein the distal fixation member comprises exactly three strut supports and exactly three proximal engagement arms, wherein each engagement arm is connected to and extends between two of the strut supports, wherein the engagement arms are configured to be positioned at least partially within respective ones of the semilunar sinuses, and wherein the prosthesis is configured to have a contracted delivery state and an expanded implantation state, and wherein the engagement arms extend radially from the support struts when the prosthesis is in its expanded delivery state. - View Dependent Claims (21, 22)
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Specification