Transluminal cardiac ball valve and method for deployment thereof
View Patent ↗A transluminal cardiac valve includes an expandable generally tubular cage including when expanded a generally uniform central region, first and second ends each diametrically constricted relative to the central region, a blood impervious region extending from the first end of the cage to within the generally uniform central region, and an inflatable plunger freely disposed and captured within the cage when inflated.
1. A transluminal cardiac valve, comprising:
an expandable generally tubular cage including when expanded:
a generally uniform central region;
first and second ends each diametrically constricted relative to the central region, wherein the first end and the second end each further comprise an opening along the end in fluid communication with the generally uniform central region;
a first frustoconical transitional portion between the first end and the central region, and a second frustoconical transitional portion between the second end and the central region; and
a blood impervious region extending from the first end of the cage to within the generally uniform central region; and
an inflatable plunger freely disposed and captured within the cage when inflated.
2. The transluminal cardiac valve of claim 1 , wherein the generally tubular cage comprises a plurality of struts forming cells therebetween when the cage is expanded.
3. The transluminal cardiac valve of claim 2 , wherein the cells within the blood impervious region are filled by a blood impervious material.
4. The transluminal cardiac valve of claim 3 , wherein the blood impervious material comprises a polymeric material.
5. The transluminal cardiac valve of claim 3 , wherein the blood impervious material is selected from a group of blood impervious materials consisting of: porous woven metal mesh and porous non-woven metal film.
6. The transluminal cardiac valve of claim 1 , wherein the inflatable plunger is made from a material selected from a group of materials consisting of: a vacuum deposited layer of metal, multiple vacuum deposited layers of metal, a polymeric material, and a pseudometallic material.
7. The transluminal cardiac valve of claim 1 , wherein the inflatable plunger is inflated with an inflation medium selected from a group of inflation media consisting of: a gas, a liquid, and a hardening polymeric material.
8. The transluminal cardiac valve of claim 1 , wherein the expandable generally tubular cage is balloon-expandable.
9. The transluminal cardiac valve of claim 1 , wherein the expandable generally tubular cage is self-expanding.
10. The transluminal cardiac valve of claim 1 , wherein the expandable generally tubular cage is manufactured from a pseudometallic material.
11. A transluminal cardiac valve, comprising:
an operational state including:
a generally tubular cage disposed in an expanded configuration having:
a generally uniform central region;
first and second ends each diametrically constricted relative to the central region, wherein the first end and the second end each further comprise an opening along the end in fluid communication with the generally uniform central region;
a first frustoconical transitional portion between the first end and the central region, and a second frustoconical transitional portion between the second end and the central region; and
a blood impervious region extending from the first end of the cage to within the generally uniform central region; and
an inflatable plunger freely disposed and captured within the cage when inflated; and
a delivery state including:
the generally tubular cage disposed in a collapsed configuration and crimped onto an inflation balloon that is attached to and in fluid communication with an inflation catheter.
12. The transluminal cardiac valve of claim 11 , wherein the delivery state further includes the inflatable plunger deflated and in fluid communication with a second inflation catheter.
13. The transluminal cardiac valve of claim 11 , further including a catheter sheath having an outer diameter of about 12 French, wherein the generally tubular cage disposed in the collapsed configuration is adapted to be contained in the collapsed configuration within a lumen of the catheter sheath.
14. The transluminal cardiac valve of claim 11 , wherein the generally tubular cage is made from one or more layers of vacuum deposited metal.
15. The transluminal cardiac valve of claim 14 , wherein the vacuum deposited metal includes controlled heterogeneities along a luminal surface of the central region.
16. The transluminal cardiac valve of claim 14 , wherein the vacuum deposited metal comprises nitinol.
17. A method for deployment of a transluminal cardiac valve, the cardiac valve including an operational state comprising a generally tubular cage disposed in an expanded configuration having a generally uniform central region, first and second ends each diametrically constricted relative to the central region, wherein the first end and the second end each further comprise an opening along the end in fluid communication with the generally uniform central region, a first frustoconical transitional portion between the first end and the central region, and a second frustoconical transitional portion between the second end and the central region, and a blood impervious region extending from the first end of the cage to within the generally uniform central region, and an inflatable plunger freely disposed and captured within the cage when inflated, and a delivery state including the generally tubular cage disposed in a collapsed configuration and crimped onto an inflation balloon that is attached to and in fluid communication with a first inflation catheter, and the inflatable plunger deflated and in fluid communication with a second inflation catheter, the method comprising the steps of:
inserting the generally tubular cage in the delivery state into a lumen of a catheter sheath such that the cage is disposed proximate a distal end of the catheter sheath;
advancing the catheter sheath into a patient until the cage is disposed at an implantation site;
translating the catheter sheath proximally relative to the first inflation catheter until the cage is free from being contained within the lumen;
inflating the inflation balloon to expand the cage;
deflating the inflation balloon;
removing the thus deflated inflation balloon and the first inflation catheter from the lumen;
inserting the inflatable plunger in the delivery state such that the inflatable plunger is disposed within the cage;
inflating the inflatable plunger to the expanded configuration with fluid via the second inflation catheter;
detaching the second inflation catheter from the inflatable plunger thus inflated to the expanded configuration;
removing the second inflation catheter and the catheter sheath from the patient.
18. The method of claim 17 , wherein the step of inflating the inflation balloon to expand the cage further comprises the step of inflating the inflation balloon to expand the cage for post deployment dilatation of the cage to achieve adequate setting of the cage at the implantation site, and further including the following step before the step of inflating the inflation balloon:
allowing the cage to self-expand at the implantation site.
19. The method of claim 17 , further including the following step before the step of translating the catheter sheath proximally relative to the first inflation catheter until the cage is free from being contained within the lumen:
minimizing motion at the implantation site.
20. The method of claim 17 , wherein the implantation site is selected from a group of implantation sites consisting of: an anatomical site of a damaged cardiac valve and within the descending thoracic aorta.