Intraluminal medical device with cannula for controlled retrograde flow
View Patent ↗Prosthetic valves for regulating fluid flow through a body vessel are described. The valves include a valve member that includes at least a portion that is capable of moving to selectively permit and substantially prevent fluid flow through the body vessel, either alone or with one or more additional valve members. A cannula is associated with the valve and permits a controlled amount of fluid flow through the valve, such as retrograde flow while the valve member substantially prevents fluid flow through the body vessel.
1. An implantable medical device for regulating fluid flow through a body vessel, said implantable medical device comprising:
a valve member moveable within said body vessel between a first position that permits said fluid flow in a first direction and a second position that substantially prevents said fluid flow in a second direction;
at least one cannula disposed adjacent the valve member and adapted to permit a controlled amount of said fluid flow through said implantable medical device in the second direction; and
means for maintaining an axial position of the valve member within said body vessel;
wherein the valve member defines an opening and the means for maintaining an axial position of the valve member within said body vessel comprises a barb at least partially disposed within the opening and through the valve member.
2. An implantable medical device according to claim 1 , wherein the means for maintaining an axial position of the valve member within said body vessel comprise an expandable support frame connected to the valve member.
3. An implantable medical device according to claim 1 , wherein the valve member comprises a remodellable material.
4. An implantable medical device according to claim 3 , wherein the at least one cannula comprises a resorbable material.
5. An implantable medical device according to claim 1 , wherein the valve member comprises an extracellular matrix material.
6. An implantable medical device according to claim 1 , wherein the valve member comprises small intestine submucosa.
7. An implantable medical device according to claim 1 , wherein the at least one cannula defines one or more pores.
8. An implantable medical device according to claim 1 , wherein the at least one cannula is formed of a resorbable material.
9. An implantable medical device according to claim 1 , wherein the at least one cannula comprises an antithrombogenic agent.
10. An implantable medical device according to claim 1 , wherein the at least one cannula comprises first and second cannulae.
11. An implantable medical device for regulating fluid flow through a body vessel, said implantable medical device comprising:
an expandable support frame having radially compressed and radially expanded configurations;
at least one valve member attached to the expandable support frame, the at least one valve member including at least a portion that is moveable between a first position that permits said fluid flow in a first direction and a second position that substantially prevents said fluid flow in a second direction;
a cannula disposed adjacent the at least one valve member and adapted to permit a controlled amount of said fluid flow through said implantable medical device in the second directions
wherein the at least one valve member comprises a remodellable material; and
wherein the cannula comprises a resorbable material.
12. An implantable medical device according to claim 11 , wherein the cannula passes through the at least one valve member.
13. An implantable medical device according to claim 12 , wherein the cannula includes a first portion disposed adjacent a first side of the valve member and a second portion disposed adjacent a second side of the valve member.
14. An implantable medical device according to claim 11 , wherein the cannula has a substantially circular cross-sectional shape.
15. An implantable medical device according to claim 11 , wherein the cannula has a substantially ovoid cross-sectional shape.
16. An implantable medical device for regulating fluid flow through a body vessel, said implantable medical device comprising:
an expandable support frame having radially compressed and radially expanded configurations;
a first valve member attached to the expandable support frame and moveable between first and second positions;
a second valve member attached to the expandable support frame and moveable between third and fourth positions, the second valve member cooperating with the first valve member to define a valve opening that selectively opens and closes with movement of the first and second valve members to permit and substantially prevent fluid flow through said implantable medical device;
a first cannula disposed through the first valve member and adapted to permit a first controlled amount of fluid flow through said implantable medical device; and
a second cannula disposed through the second valve member and adapted to permit a second controlled amount of fluid flow through said implantable medical device;
wherein at least one of the first and second valve members comprises a remodellable material; and
wherein at least one of the first and second cannulae comprises a resorbable material.