Sewing ring having increased annular coaptation
First Claim
1. A sewing ring for use in implanting a prosthetic heart valve to a support annulus, comprising:
- a suture-penetable annular ring member formed of a plurality of deformable walls, some of which are radially aligned to define open cells therebetween, the annular ring member being oriented about an axis and having a top end and a bottom end spaced along the axis, the annular ring member having a cross section defined by an axially extending inner ring side, a top side projecting radially outward from the top end of the inner ring side, and a coaptation side extending between an outermost projection of the top side and the inner ring side, wherein the coaptation side is at least partly concavely curved and is defined by one of the deformable walls to thereby provide a concavely curved tissue coaptation surface around the periphery of the ring that compliantly conforms to the support annulus and resists perivalvular leaking therebetween; and
a fabric covering surrounding at least an outer portion of the annular ring member.
2 Assignments
0 Petitions
Accused Products
Abstract
A sewing ring for implantation of prosthetic heart valves has a compliant ring member made of a plurality of cells. The ring member may be silicon rubber and the cells defined within outer walls and inner ribs. A biocompatible fabric covering surrounds at least an outer portion of the ring member, and the assembly mounts to a mechanical or tissue-type prosthetic heart valve. The ring member has a radial dimension and cross-sectional area sufficient to ensure a large coaptation area between the sewing ring and the annulus tissue so as to enable adequate attachment of the valve without load distributing devices such as pledgets. A version of the sewing ring for attachment to the mitral annulus includes a curved coaptation edge, while another embodiment for attachment to the aortic annulus has a tapered outer edge with increased radial and axial dimensions. The sewing ring eliminates the need for pledgets, reduces the number of sutures required, lessens the potential for decubitous ulceration, and provides a better seal against perivalvular leakage. Moreover, the aortic valve sewing ring is sufficiently flexible and large to be able to be placed intra- or supra-annularly, as the surgeon deems best for the patient.
184 Citations
21 Claims
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1. A sewing ring for use in implanting a prosthetic heart valve to a support annulus, comprising:
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a suture-penetable annular ring member formed of a plurality of deformable walls, some of which are radially aligned to define open cells therebetween, the annular ring member being oriented about an axis and having a top end and a bottom end spaced along the axis, the annular ring member having a cross section defined by an axially extending inner ring side, a top side projecting radially outward from the top end of the inner ring side, and a coaptation side extending between an outermost projection of the top side and the inner ring side, wherein the coaptation side is at least partly concavely curved and is defined by one of the deformable walls to thereby provide a concavely curved tissue coaptation surface around the periphery of the ring that compliantly conforms to the support annulus and resists perivalvular leaking therebetween; and a fabric covering surrounding at least an outer portion of the annular ring member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification