Valve Prosthetic Fixation Techniques Using Sandwiching
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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
200 Claims
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1-188. -188. (canceled)
- 189. An expandable stent for implantation in a patient comprising a plurality of positioning arches configured to be positioned within a plurality of pockets of the patient'"'"'s native heart valve and positioned on a first side of a plurality of native heart valve leaflets, and a plurality of retaining arches configured to be positioned on a second side of the plurality of native heart valve leaflets opposite the first side.
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200. A method of treating a native valve with a valve prosthesis supported on a stent including a plurality of first arches each having an open end joined to an open end of an adjacent first arch, a plurality of second arches each having an open end joined to an open end of an adjacent second arch, and at least one third arch having an open end and being interspaced between and joined to two adjacent first arches, the method comprising the steps of:
- positioning the plurality of first arches within pockets of the native heart valve;
positioning at least a portion of the native heart valve between the plurality of first arches and the plurality of second arches; and
applying a radial force against a portion of a vascular wall with the at least one third arch.
- positioning the plurality of first arches within pockets of the native heart valve;
Specification