MULTIPLE COMPONENT PROSTHETIC HEART VALVE ASSEMBLIES AND METHODS FOR DELIVERING THEM

• US 20070288089A1
• Filed: 04/30/2007
• Published: 12/13/2007
• Est. Priority Date: 04/29/2006
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Nguyen-Fitterer, Mimi, Ino, Takashi, Gurskis, Donnell
• Granted Patent: US 8,821,569 B2
• Time in Patent Office: Days
• US Class Current: 623/2.400
• CPC Class Codes: A61B 17/0469 Suturing instruments for use in minimally invasive surgery, e.g. endoscopic surgery
• CPC Class Codes: A61B 2017/00243 cardiac
• CPC Class Codes: A61F 2/2409 Support rings therefor, e.g. for connecting valves to tissue annuloplasty rings A61F2/2442
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2/2427 Devices for manipulating or deploying heart valves during implantation
• CPC Class Codes: A61F 2/243 Deployment by mechanical expansion
• CPC Class Codes: A61F 2/2439 Expansion controlled by filaments
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2250/0063 Nested prosthetic parts

Abstract

Multiple component heart valves and apparatus and methods for implanting them are provided. The heart valve generally includes a first annular prosthesis and a second valve prosthesis. The first prosthesis includes an annular member compressible from a relaxed condition to a contracted condition to facilitate delivery into a biological annulus, the annular member being resiliently expandable towards the relaxed condition. The first prosthesis also includes guide rails extending therefrom. The second prosthesis includes an annular frame, valve elements, and receptacles for receiving respective guide rails therethrough when the second prosthesis is directed towards the first prosthesis. In addition, a valve holder may releasably carry the valve prosthesis that includes channels for receiving respective guide rails therethrough when the guide rails are received through the valve prosthesis. A delivery tool is also provided that includes an actuator for selectively compressing the annular member into the contracted condition.

Claims

1. A method for implanting a heart valve assembly in a biological annulus, the method comprising:

inserting a first prosthesis into the biological annulus with the first prosthesis in a contracted condition, the first prosthesis comprising a plurality of leaders extending therefrom;

deploying the first prosthesis in the biological annulus such that the first prosthesis expands to an enlarged condition within the biological annulus;

securing the first prosthesis to tissue surrounding the biological annulus; and

advancing a second valve prosthesis along the leaders into engagement with the implanted prosthesis.

2. The method of claim 1, wherein the first prosthesis is secured to tissue by directing a plurality of fasteners through a sewing cuff of the first prosthesis.

3. The method of claim 1, further comprising securing the second prosthesis to the first prosthesis.

4. The method of claim 3, wherein the second prosthesis is secured to the first prosthesis by retention elements on the leaders.

5. The method of claim 1, wherein tissue surrounding the biological annulus is dilated when the first prosthesis is deployed.

6. A method for delivering an annular first prosthesis into a biological annulus, the first prosthesis comprising a plurality of leaders extending therefrom, the method comprising:

securing the leaders to a delivery tool such that the first prosthesis is disposed adjacent a distal end of the delivery tool;

applying axial tension to the leaders to compress the first prosthesis inwardly to a contracted condition;

introducing the distal end of the delivery tool into a biological annulus with the first prosthesis in the contracted condition; and

deploying the first prosthesis in the biological annulus such that the prosthesis expands to an enlarged condition.

7. The method of claim 6, further comprising securing the first prosthesis to tissue surrounding the biological annulus.

8. The method of claim 7, further comprising securing a second valve prosthesis to the first prosthesis after deploying the first prosthesis in the biological annulus.

9. The method of claim 7, further comprising advancing the second prosthesis over the leaders towards the first prosthesis before securing the second prosthesis to the first prosthesis.

10. The method of claim 6, wherein tissue surrounding the biological annulus is dilated when the first prosthesis is deployed.

11. A method for implanting a heart valve assembly in a biological annulus, the method comprising:

constraining a first annular prosthesis in a contracted condition;

introducing the first prosthesis into the biological annulus in the contracted condition;

deploying the first prosthesis within the biological annulus such that first prosthesis expands towards an enlarged condition;

introducing a second prosthesis into the biological annulus; and

securing the second prosthesis to first prosthesis.

12. The method of claim 11, wherein the second prosthesis is secured to the first prosthesis by advancing one or more knots down the leaders after the second prosthesis is introduced into the biological annulus.

13. A method for implanting a heart valve assembly in a biological annulus, the method comprising:

introducing a first prosthesis into a biological annulus, the first prosthesis comprising a plurality of leaders extending therefrom;

directing a second prosthesis over the leaders towards the first prosthesis until portions of second prosthesis pass over connectors on the leaders.

14. The method of claim 13, wherein the first prosthesis comprises an annular member and a sewing cuff extending outwardly from the annular member, and wherein the second prosthesis sealingly engages the sewing cuff upon passing over the connectors on the leaders.

15. The method of claim 13, wherein the connectors comprise a tapered arrow shape allowing the second prosthesis to pass freely over the connectors towards the first prosthesis but substantially prevent subsequent proximal movement of the second prosthesis away from the first prosthesis.

16. The method of claim 13, further comprising severing the leaders above the connectors after the second prosthesis has passed over the connectors.

17. The method of claim 16, wherein the leaders comprise weakened regions above the connectors, and wherein the leaders are severed by subjecting the leaders to tension sufficient to break the weakened regions.

18. The method of claim 13, further comprising introducing free ends of the leaders through introducers on the second prosthesis before directing the second prosthesis over the leaders.

19. The method of claim 18, further comprising removing the introducers from the second prosthesis.

20. The method of claim 19, wherein the introducers comprise tubular members received through fabric of the second prosthesis.

21. The method of claim 20, wherein the introducers are removed from the second prosthesis after the second prosthesis is passed over the connectors.

22. The method of claim 13, further comprising advancing one or more knots down the leaders after directing the second prosthesis over the leaders.