Prosthetic aortic valve
First Claim
1. A prosthetic aortic mechanical valve, comprisinga substantially round tubular valve body, which body has a longitudinal axis, an outlet end, a flared inlet end, an inner surface, and an outer surface, said outer surface comprising a semirigid sewing flange and a circumferential groove on said outer surface, said groove lying between and spacing apart said flared inlet end and said semirigid sewing flange;
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wherein said semirigid sewing flange comprises at least first and second flange portions which are spaced circumferential apart from each other and longitudinally from said flared inlet end, a plurality of said flange portions comprising at least one post for securing sutures, which post is spaced radially from said outer surface to permit the passage of sutures therebetween.
1 Assignment
0 Petitions
Accused Products
Abstract
A prosthetic aortic valve is designed to be implanted in the natural aortic annulus and to extend into the ascending aorta to a point short of the right and left coronary arteries. Blood leakage around the valve is prevented by tension in one or more circumferential cords drawing annular tissue into sealing contact with an external sealing ring on the valve body. The security of the valve'"'"'s attachment to a patient is assured with a plurality of interrupted sutures between a semirigid flange on the valve outer surface and the patient'"'"'s aortic commissures and/or the patient'"'"'s ascending aortic wall. The sutures are preferably attached to posts or cleats on the semirigid sewing flange, the flange being spaced apart from the valve inlet by the sealing ring.
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Citations
31 Claims
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1. A prosthetic aortic mechanical valve, comprising
a substantially round tubular valve body, which body has a longitudinal axis, an outlet end, a flared inlet end, an inner surface, and an outer surface, said outer surface comprising a semirigid sewing flange and a circumferential groove on said outer surface, said groove lying between and spacing apart said flared inlet end and said semirigid sewing flange; - and
flow control means within said tubular valve body for intermittently and reversibly sealing across said valve body inner surface to allow substantially unidirectional flow through said tubular valve body from said inlet end to said outlet end; wherein said semirigid sewing flange comprises at least first and second flange portions which are spaced circumferential apart from each other and longitudinally from said flared inlet end, a plurality of said flange portions comprising at least one post for securing sutures, which post is spaced radially from said outer surface to permit the passage of sutures therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A prosthetic aortic mechanical valve, comprising
a substantially round tubular valve body, which body has a longitudinal axis, an outlet end, a flared inlet end, an inner surface, and an outer surface, said outer surface comprising a semirigid sewing flange and a circumferential groove on said outer surface, said groove lying between and spacing apart said flared inlet end and said semirigid sewing flange; - and
flow control means within said tubular valve body, said flow control means for intermittently and reversibly sealing across said valve body inner surface to allow substantially unidirectional flow through said tubular valve body from said inlet end to said outlet end; wherein said semirigid sewing flange comprises at least first and second flange portions which are spaced circumferentially apart from each other and longitudinally from said flared inlet end, a plurality of said flange portions comprising at least one cleat for securing sutures, which cleat is spaced radially from said outer surface to permit the passage of sutures therebetween. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A prosthetic aortic mechanical valve, comprising
a substantially rigid tubular valve body having an inlet and an outlet and inner and outer surfaces; -
internal flow control means in contact with said inner surface which establishes unidirectional blood flow through said valve body; an external discontinuous semirigid sewing flange disposed circumferencially about said outer surface and having portions spaced radially from said surface for securing said valve body in a patient; and a sealing ring comprising an external continuous circumferential non-fibrous tissue adherence band on said outer surface of said valve body at a location between said inlet and said sewing flange and spaced longitudinally from both said inlet and said sewing flange. - View Dependent Claims (17)
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18. A prosthetic aortic mechanical valve comprising
a tubular valve body made of pyrolytic carbon having a longitudinal axis, an outlet end, a flared inlet end, an inner surface, and an outer surface, said outer surface comprising a semirigid sewing flange and being formed with a circumferential groove, said groove lying between and spacing apart said flared inlet end and said semirigid sewing flange and including a tissue adherence band of unpolished pyrolitic carbon; - and
flow control means within said tubular valve body for intermittently and reversibly sealing across said valve body inner surface to allow substantially unidirectional flow through said tubular valve body from said inlet end to said outlet end; wherein said semirigid sewing flange comprises at least first and second portions which are spaced circumferentially apart from each other and spaced longitudinally from said flared inlet end, a plurality of said flange portions each comprising at least one post for securing sutures, each said post comprising a non-fibrous tissue adherence area comprising unpolished pyrolytic carbon. - View Dependent Claims (19, 20, 21, 22, 23)
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24. A prosthetic aortic mechanical valve, which valve comprises
a substantially rigid tubular valve body of substantially circular cross section, which body has a longitudinal axis, an outlet end, a flared inlet end, an inner surface and an outer surface, said valve body comprising a flange extending radially outward from the outer surface for attachment of said valve body in the aorta of a patient by sutures extending through the patient'"'"'s tissue, flow control means within said tubular valve body for intermittently and reversibly sealing across said valve body inner surface to establish substantially unidirectional flow through said tubular valve body from said inlet end to said outlet end; - and
a circumferential continuous non-fibrous tissue adherence band circumscribing said outer surface of said valve body at a location between and spaced apart from said inlet end and said attachment flange. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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Specification