Prosthetic valve with vortice-inducing baffle

• US 9,662,203 B2
• Filed: 06/11/2014
• Issued: 05/30/2017
• Est. Priority Date: 06/11/2014
• Status: Active Grant

• Current Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Original Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Inventors: Duffy, Niall, Sheahan, Edmond
• Primary Examiner(s): Stransky, Katrina
• Assistant Examiner(s): Schutte, Wade P
• Application Number:
  US14/301,632
• Publication Number:
  US 20150359631A1
• Time in Patent Office: 1,084 Days
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2002/068 Modifying the blood flow model, e.g. by diffuser or deflector

Abstract

A prosthetic valve comprising a stent frame, a valve structure, and a baffle structure. The stent frame defines a lumen. The valve structure is disposed within the lumen, and defines an inflow side and an outflow side. An outflow track is established within the lumen downstream of the outflow side and along which fluid flow from the valve structure progresses. The baffle structure is connected to the stent frame downstream of the outflow side and is configured to induce vortical flow, for example including a vortex ring. In some embodiments, the prosthetic valve is a transcatheter prosthetic mitral valve having three leaflets.

Claims

1. A prosthetic mitral valve having an inflow end opposite an outflow end, the prosthetic valve comprising:

a stent frame having an inflow end, an outflow end and defining a lumen, the stent frame configured for placement within a native mitral valve annulus;

a valve structure disposed within the lumen and configured to define an inflow side and an outflow side opposite the inflow side;

wherein an outflow track is established within the lumen downstream of the outflow side and along which fluid flow from the valve structure progresses; and

a baffle structure connected to the stent frame downstream of the outflow side and configured to induce vortical flow;

wherein the baffle structure includes a first baffle member positioned entirely between the inflow end and the outflow end of the stent frame;

wherein the outflow track has a diameter;

and further wherein the first baffle member has an attached end connected to a side of the stent frame and a free end opposite the attached end;

and even further wherein a size of the first baffle member is such that a distance from the attached end to the free end is less than the diameter of the outflow track.

2. The prosthetic valve of claim 1, wherein the baffle structure is configured to induce vortical flow into blood flow from the outflow end.

3. The prosthetic valve of claim 1, wherein the baffle structure is configured to manipulate a natural uniform velocity profile of blood flow at the outflow side of the valve structure.

4. The prosthetic valve of claim 3, wherein the baffle structure is configured to disrupt at least 10% of the natural uniform velocity profile.

5. The prosthetic valve of claim 1, wherein the valve structure is configured such that during use, fluid flow between the outflow side and the baffle structure has a first velocity profile and fluid flow exiting the outflow end has a second velocity profile differing from the first velocity profile.

6. The prosthetic valve of claim 5, wherein the second velocity profile includes a vortex ring.

7. The prosthetic valve of claim 1, wherein the lumen has a diameter and further wherein the first baffle member projects across less than an entirety of the diameter of the lumen.

8. The prosthetic valve of claim 7, wherein the baffle structure further includes a second baffle member located downstream of the first baffle member, and further wherein the second baffle member projects across less than an entirety of the diameter of the outflow track.

9. The prosthetic valve of claim 8, wherein the first baffle member is diametrically opposite the second baffle member.

10. The prosthetic valve of claim 7, wherein the first baffle member projects across at least 10% of the diameter of the outflow track.

11. The prosthetic valve of claim 1, wherein the stent frame defines the outflow end of the prosthetic valve.

12. The prosthetic valve of claim 1, wherein the baffle structure defines the outflow end of the prosthetic valve.

13. The prosthetic valve of claim 1, wherein the valve structure includes a greater or lesser number of leaflets than the native mitral valve.

14. The prosthetic valve of claim 1, wherein the valve structure is symmetric.

15. The prosthetic valve of claim 1, wherein the valve structure includes three leaflets.

16. The prosthetic valve of claim 7, wherein the first baffle member is a solid plate.

17. The prosthetic valve of claim 7, wherein the first baffle member is a perforated plate.

18. The prosthetic valve of claim 1, wherein the lumen defines a central axis and the first baffle member has an orientation that is generally perpendicular to the central axis.

19. A prosthetic mitral valve having an inflow end opposite an outflow end, the prosthetic valve comprising:

a stent frame having an inflow end, an outflow end and defining a lumen, the stent frame configured for placement within a native mitral valve annulus;

wherein the lumen defines a central axis;

a valve structure disposed within the lumen and configured to define an inflow side and an outflow side opposite the inflow side;

wherein an outflow track is established within the lumen downstream of the outflow side and along which fluid flow from the valve structure progresses; and

a baffle structure having a first baffle member connected to the stent frame downstream of the outflow side and configured to induce vortical flow;

wherein the outflow track has a diameter;

and further wherein the first baffle member has an attached end connected to a side of the stent frame and a free end opposite the attached end;

and further wherein the first baffle member has an orientation that is generally perpendicular to the central axis;

and even further wherein a size of the first baffle member is such that a distance from the attached end to the free end is less than the diameter of the outflow track.

20. The prosthetic valve of claim 19, wherein the first baffle member is positioned entirely between the inflow end and the outflow end.

21. The prosthetic valve of claim 19, wherein the baffle structure includes a perforated plate.