Treatment of tricuspid insufficiency
A tricuspid insufficiency treatment device includes a vena cava member ( 12 ) implantable in a vena cava of a patient. The vena cava member ( 12 ) is formed with a fenestration ( 14 ) and further includes a blocking member ( 16 ) arranged to block and unblock the fenestration ( 14 ).
1. A tricuspid insufficiency treatment apparatus comprising:
a cylindrical, tubular member having a tubular axis and configured for implantation within a vena cava of a patient, the tubular member formed with a sidewall having an exterior surface;
and
at least one blood-flow valve comprising:
a fenestration formed in the sidewall of the tubular member;
and
a blocking member arranged to open outwardly from the exterior surface so as to block and unblock the flow of blood out through the fenestration during ventricular systole and ventricular diastole, respectively.
2. The apparatus of claim 1 , wherein the at least one blood-flow valve comprises a plurality of blood-flow valves, each blood-flow valve of the plurality of blood-flow valves comprising:
a fenestration formed in the sidewall, and
a blocking member arranged to block and unblock a respective fenestration.
3. The apparatus of claim 2 , wherein the plurality of blood-flow valves are arranged circumferentially along the sidewall.
4. The apparatus of claim 2 , wherein each blocking member comprises a flap or cover pivotally attached at or proximate a portion of a respective fenestration and arranged to block and unblock the fenestration during ventricular systole and ventricular diastole, respectively, such that the fenestration is unblocked in a direction opposite to the attachment of the flap or cover.
5. The apparatus according to claim 2 , wherein at least one of the blood-flow valves of the plurality of blood-flow valves is arranged toward the first end of the tubular member and at least one of the blood-flow valves of the plurality of blood-flow valves is arranged toward the second end of the tubular member.
6. The apparatus of claim 1 , wherein the tubular member and the blocking member of the blood-flow valve form a closed cylindrical outer shape when the blocking member blocks the fenestration.
7. The apparatus of claim 2 , wherein the tubular member and the plurality of blocking members of the plurality of blood-flow valves form a closed cylindrical outer shape when the blocking members block the fenestrations.
8. The apparatus of claim 2 , wherein some of the blocking members are arranged to unblock respective fenestrations in a first direction and some of the blocking members are arranged to unblock their respective fenestrations in a second direction.
9. The apparatus according to claim 2 , wherein the tubular member comprises an expandable stent body.
10. The apparatus of claim 2 , wherein some of the blocking members are arranged to unblock respective fenestrations during ventricular diastole in a direction of an orifice of the superior vena cava of the patient.
11. The apparatus of claim 2 , wherein some of the blocking members are arranged to unblock respective fenestrations during ventricular diastole in a direction of an orifice of the inferior vena cava of the patient.
12. The apparatus of claim 2 , wherein each of the plurality of blocking members each comprise a reinforcing structure.
13. The apparatus of claim 2 , wherein the plurality of blood-flow valves comprise at least one first set of blood-flow valves arranged toward the first end of the tubular member and at least one second set of blood-flow valves arranged toward the second end of the tubular member.
14. A tricuspid insufficiency treatment apparatus comprising:
a tubular member configured for implantation within a vena cava of a patient, the tubular member formed with a sidewall having an exterior surface;
and
a plurality of blood-flow valves arranged circumferentially along the sidewall, each comprising:
a fenestration formed in the sidewall; and
a blocking member arranged to open outwardly from the exterior surface so as to block and unblock the flow of blood out through the fenestration during ventricular systole and ventricular diastole, respectively,
wherein each blocking member comprises a flap or cover pivotally attached at or proximate a portion of a respective fenestration and arranged to block and unblock the fenestration, such that the fenestration is unblocked in a direction opposite to the attachment of the flap or cover.
15. The apparatus of claim 14 , wherein some of the blocking members are arranged to unblock respective fenestrations in a first direction and some of the blocking members are arranged to unblock their respective fenestrations in a second direction.
16. The apparatus of claim 14 , wherein some of the blocking members are arranged to unblock respective fenestrations during ventricular diastole in a direction of an orifice of the superior vena cava of the patient.
17. The apparatus of claim 14 , wherein some of the blocking members are arranged to unblock respective fenestrations during ventricular diastole in a direction of an orifice of the inferior vena cava of the patient.
18. The apparatus of claim 14 , wherein the plurality of blood-flow valves comprise at least one first set of blood flow valves arranged toward the first end of the tubular member and at least one second set of blood flow valves arranged toward the second end of the tubular member.
19. A tricuspid insufficiency treatment apparatus comprising:
a tubular member configured for implantation within a vena cava of a patient, the tubular member formed with a sidewall having an exterior surface;
and
a plurality of blood-flow valves arranged circumferentially along the sidewall, each comprising:
a fenestration formed in the sidewall; and
a blocking member arranged to open outwardly from the exterior surface so as to block and unblock the flow of blood out through the fenestration during ventricular systole and ventricular diastole, respectively,
wherein:
each blocking member comprises a flap or cover pivotally attached at or proximate a portion of a respective fenestration and arranged to block and unblock the fenestration, such that the fenestration is unblocked in a direction opposite to the attachment of the flap or cover, and
the tubular member and the plurality of blocking members of the plurality of blood-flow valves form a closed cylindrical outer shape when the blocking members block the fenestrations during ventricular systole.
20. The apparatus of claim 1 , wherein the blocking member comprises a flap or cover pivotally attached to a respective fenestration.
21. A tricuspid insufficiency treatment apparatus comprising:
a tubular member configured for implantation within a vena cava of a patient, the tubular member formed with a sidewall having an exterior surface;
and
a plurality of blood-flow valves arranged circumferentially along the sidewall, each comprising:
a fenestration formed in the sidewall; and
a blocking member arranged to open outwardly from the exterior surface so as to block and unblock the flow of blood out through the fenestration during ventricular systole and ventricular diastole, respectively.