Transcatheter Valve With Torsion Spring Fixation And Related Systems And Methods

• US 20140180401A1
• Filed: 01/15/2014
• Published: 06/26/2014
• Est. Priority Date: 04/01/2010
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Clague, Cynthia T., Rothstein, Paul T., QUILL, Jason
• Granted Patent: US 9,925,044 B2
• Time in Patent Office: Days
• US Class Current: 623/2.17
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2/2436 Deployment by retracting a sheath
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2220/0091 connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped

Abstract

Described is a prosthetic valve, comprising: an expandable stent including an inner lumen and having a first and a second end; and a spring attached to the first end of the expandable stent; wherein the expandable stent and the spring can expand radially to a desired diametric configuration in order to anchor the prosthetic valve at an implantation position in a body lumen. Related systems and methods.

Claims

1-17. -17. (canceled)

18. A prosthetic valve, comprising:

an expandable stent comprising a first end, a second end, an inner lumen, and a longitudinal axis; and

an expandable spring connected to the first end of the expandable stent,

wherein a circumference of the expandable spring is perpendicular to the longitudinal axis of the expandable stent.

19. The prosthetic valve of claim 18, further comprising a valvular element disposed in the inner lumen of the expandable stent.

20. The prosthetic valve of claim 19, wherein the valvular element comprises at least one leaflet

21. The prosthetic valve of claim 18, further comprising a plurality of support arms connecting the expandable spring to the first end of the expandable stent.

22. The prosthetic valve of claim 18, wherein the expandable spring is circular.

23. The prosthetic valve of claim 18, wherein the expandable spring comprises at least one coil perpendicular to the longitudinal axis of the expandable stent.

24. The prosthetic valve of claim 18, wherein the expandable spring comprises a plurality of coils wound about the longitudinal axis of the expandable stent.

25. The prosthetic valve of claim 24, wherein the coils contact each other.

26. The prosthetic valve of claim 24, wherein the coils are spaced from each other.

27. The prosthetic valve of claim 18, wherein second end of the expandable stent is flared outward relative to the longitudinal axis of the expandable stent.

28. The prosthetic valve of claim 18, further comprising a second expandable spring connected to the second end of the expandable stent.

29. The prosthetic valve of claim 18, wherein the expandable spring comprises a shape memory alloy.

30. The prosthetic valve of claim 18, wherein the expandable spring comprises a torsion spring.

31. The prosthetic valve of claim 18, wherein the prosthetic valve is a prosthetic heart valve.

32. The prosthetic valve of claim 31, wherein the prosthetic valve is a prosthetic mitral valve.

33. The prosthetic valve of claim 31, wherein the prosthetic valve is a prosthetic aortic valve.

34. A prosthetic valve delivery system, comprising:

a prosthetic valve, comprising;

an expandable stent comprising a first end, a second end, an inner lumen, and a longitudinal axis; and

an expandable spring connected to the first end of the expandable stent,

wherein a circumference of the expandable spring is perpendicular to the longitudinal axis of the expandable stent; and

a sheath comprising an inner lumen,

wherein the expandable stent is compressed into a collapsed position and restrained within the inner lumen of the sheath.

35. The prosthetic valve delivery system of claim 34, wherein a diameter of the sheath is smaller than an expanded diameter of the expandable stent.

36. The prosthetic valve delivery system of claim 34, further comprising a pushing rod that extends within the inner lumen of the sheath.

37. A method of implanting a prosthetic valve, comprising:

inserting a delivery system with a prosthetic valve into a body lumen, the prosthetic valve comprising;

an expandable stent comprising a first end, a second end, an inner lumen, and a longitudinal axis; and

an expandable spring connected to the first end of the expandable stent,

wherein a circumference of the expandable spring is perpendicular to the longitudinal axis of the expandable stent;

at least partially deploying the prosthetic valve at an implantation location; and

proximally pulling the prosthetic valve to engage the expandable spring with a wall of the body lumen.

38. The method of claim 37, wherein inserting the delivery system into the body lumen comprises transapically inserting the delivery system into a heart.

39. The method of claim 37, wherein proximally pulling the prosthetic valve engages the expandable spring with a heart wall in a left atrium adjacent a mitral valve annulus.