Prosthetic vein valve and method
First Claim
1. A prosthetic valve adapted to be inserted into a blood vessel and held in a desired position therein, comprising:
- an annular support ring having a longitudinal axis and defining a substantially circular central opening for passage of blood;
an outer wall on said support ring, said outer wall having a central annular depression therein;
a leaflet mounted on said support ring for pivotal movement between a closed position wherein said leaflet substantially blocks said central opening and an open position wherein blood is permitted through said opening;
whereby said valve may be inserted into said blood vessel such that said support ring longitudinal axis is substantially coincident with an axis of elongation of said blood vessel and held in such position by way of a tightened cord holding a proximate portion of said blood vessel in said annular depression.
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Accused Products
Abstract
A prosthetic valve adapted to be inserted into a blood vessel and held in a desired position therein. The valve includes an annular support ring having a longitudinal axis and defining a substantially circular central opening for passage of blood. The support ring has an outer wall that may be formed with a central annular depression. A leaflet is mounted on the support ring for pivotal movement between a closed position wherein the leaflet substantially blocks the central opening and an open position wherein blood is permitted through the opening. The valve is adapted to be inserted into the blood vessel such that the support ring longitudinal axis is substantially coincident with an axis of elongation of said blood vessel and held in such position in suitable fashion, such as by suturing or by way of a tightened cord holding a proximate portion of the blood vessel against the support outer wall if it is formed with an annular depression. The valve may additionally include a radial passage extending through the support ring and a stem extending radially outwardly from the radial passage. The stem has a central bore communicating with the radial passage and is adapted to extend through the wall of the blood vessel when the valve is mounted therein and provide an entry for introduction of anti-clotting agents and other materials proximate the valve. The valve may further include a plurality of external stabilizer elements adapted to extend through the wall of the blood vessel and provide locations for attaching various valve stabilizing assemblies. The support ring can also be made to be deformable or expandable to facilitate insertion and securement thereof in the vein.
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Citations
20 Claims
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1. A prosthetic valve adapted to be inserted into a blood vessel and held in a desired position therein, comprising:
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an annular support ring having a longitudinal axis and defining a substantially circular central opening for passage of blood;
an outer wall on said support ring, said outer wall having a central annular depression therein;
a leaflet mounted on said support ring for pivotal movement between a closed position wherein said leaflet substantially blocks said central opening and an open position wherein blood is permitted through said opening;
whereby said valve may be inserted into said blood vessel such that said support ring longitudinal axis is substantially coincident with an axis of elongation of said blood vessel and held in such position by way of a tightened cord holding a proximate portion of said blood vessel in said annular depression. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 19)
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15. A method of implanting a prosthetic valve within a blood vessel at a desired position therein, comprising the steps of:
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providing a prosthetic valve including an annular support ring having a longitudinal axis and defining a substantially circular central opening for passage of blood;
an outer wall on said support ring, said outer wall having a central annular depression therein;
a leaflet mounted on said support ring for pivotal movement between a closed position wherein said leaflet substantially blocks said central opening and an open position wherein blood is permitted through said opening;
forming an opening in the blood vessel at a location therein that is spaced from a location at which said valve is desired to be implanted;
inserting said valve through the formed opening to such desired location at which said valve is to be implanted and orienting said valve so that said support ring longitudinal axis is substantially coincident with an axis of elongation of said blood vessel;
providing a cord;
tightening said cord about the outer wall of the blood vessel such that the proximate portion of the blood vessel is caused to assume the contour of said annular depression; and
securing said cord in said tightened condition to secure said support ring in a desired position.
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20. A prosthetic valve adapted to be inserted into a blood vessel and held in a desired position therein, comprising:
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an annular support ring having a longitudinal axis and defining a substantially circular central opening for passage of blood;
a radial passage in said support ring, said passage extending from an outer wall of said support ring to said central opening;
a leaflet mounted on said support ring for pivotal movement between a closed position wherein said leaflet substantially blocks said central opening and an open position wherein blood is permitted through said opening, said leaflet being weighted at locations thereof that are remote from its point of mounting on said support ring to assist in valve closure;
a stem extending radially outwardly from said support ring radial passage, said stem having a central bore communicating with said radial passage and being adapted to extend through the wall of said blood vessel when said valve is mounted therein and provide an entry for introduction of anti-clotting agents and other materials proximate said valve; and
whereby said valve may be inserted into said blood vessel such that said support ring longitudinal axis is substantially coincident with an axis of elongation of said blood vessel and held in such position by appropriate attachment to said blood vessel.
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Specification