Transmyocardial implant with flow reduction
First Claim
1. A transmyocardial implant for establishing a blood flow path through a heart wall between a heart chamber and a lumen of a coronary vessel comprising:
- a hollow conduit having an open first end and an open second end, said conduit sized to extend at least from said vessel through said heart wall and into said chamber, said conduit having a conduit wall defining a blood flow pathway within an interior of said conduit between said first and second ends;
said first and second ends mutually positioned for said first end to reside within said vessel and opposing a wall of said vessel when said conduit is placed within said heart wall with said second end protruding into said chamber;
said conduit wall formed of a material sufficiently rigid to resist deformation and closure of said pathway in response to contraction of said heart wall;
a flow restriction formed in said pathway configured to reduce a discharge velocity of blood flow discharged from said first end, the flow restriction defined by a variation in a cross-sectional area of the blood flow defined by the conduit wall.
2 Assignments
0 Petitions
Accused Products
Abstract
A transmyocardial implant establishes a blood flow path through a heart wall between a heart chamber and a lumen of a coronary vessel on the heart wall. The implant includes a hollow conduit having an open first end and an open second end. The conduit is dimensioned so as to extend at least from the vessel through said heart wall and into said chamber. The conduit has a conduit wall defining a blood flow pathway within an interior of said conduit between the first and second ends. The first and second ends are mutually positioned for the first end to reside within the vessel and opposing a wall of the vessel when the conduit is placed within the heart wall with the second end protruding into the chamber. The conduit wall is formed of a material sufficiently rigid to resist deformation and closure of the pathway in response to contraction of the heart wall. A flow restriction is formed in the pathway for reducing a discharge velocity of blood flow discharged from the first end.
290 Citations
23 Claims
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1. A transmyocardial implant for establishing a blood flow path through a heart wall between a heart chamber and a lumen of a coronary vessel comprising:
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a hollow conduit having an open first end and an open second end, said conduit sized to extend at least from said vessel through said heart wall and into said chamber, said conduit having a conduit wall defining a blood flow pathway within an interior of said conduit between said first and second ends;
said first and second ends mutually positioned for said first end to reside within said vessel and opposing a wall of said vessel when said conduit is placed within said heart wall with said second end protruding into said chamber;
said conduit wall formed of a material sufficiently rigid to resist deformation and closure of said pathway in response to contraction of said heart wall;
a flow restriction formed in said pathway configured to reduce a discharge velocity of blood flow discharged from said first end, the flow restriction defined by a variation in a cross-sectional area of the blood flow defined by the conduit wall. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for establishing a blood flow path through a heart wall between a heart chamber and a lumen of a coronary vessel on said heart wall, said method comprising:
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forming a blood flow path from said vessel through said heart wall and into said chamber;
maintaining said blood flow path open during both systole and diastole; and
restricting blood flow through said pathway to reduce a discharge velocity of blood flow discharged into said vessel. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification