IP Library › Granted Patent US 12,318,294
Granted Patent B2
US 12,318,294 · App. 17/974,357 · Granted Jun 3, 2025

Tissue grasping devices and related methods

Inventors: Raghuveer Basude (Fremont, CA); Shri Krishna Basude (Fremont, CA)
A61F2/246A61F2/2463A61F2/2466A61F2210/0014A61F2220/0008A61F2250/0003A61F2250/0051
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Quick Facts
Patent No.
US 12,318,294
App. No.
17/974,357
Granted
Jun 3, 2025
Kind
B2
Abstract

A prosthetic device for sealing a native heart valves to prevent or reduce regurgitation comprises a spacer having one or more anchors. The spacer may also have atrial support structures, ventricular support structures, or both atrial and ventricular support structures In some cases, the spacer has anchors that attach to the leaflets as well as atrial and ventricular support. In some cases, the spacer straddles the annulus and is located by anchors, and in some cases the support structures can be implanted within the native heart valve. In some cases, the prosthetic device reduces the annulus diameter when implanted within the native heart vasculature. In some cases, the prosthetic device cinches the annulus when implanted within the native heart vasculature.

Claims (28)

1. A method comprising:

providing a prosthetic sealing device comprising:

a leaf-spring having an atrial leaf spring segment and a ventricular leaf spring segment, the segments being joined at a base and configured to open in response to an opening force to form a leaflet-receiving gap and to resiliently close toward each other when the opening force is removed, and

a body attached to the base of the leaf spring, wherein the body is configured to expand to inhibit the flow of blood through the body;

positioning a delivery port of a delivery catheter cannula adjacent to a target heart valve in a patient;

advancing a ventricular segment of the prosthetic sealing device distally through the delivery port of the delivery catheter;

positioning the ventricular segment of the prosthetic sealing device on one side of a target valve leaflet;

advancing an atrial segment of the prosthetic sealing device distally through the delivery port of the delivery catheter to form the leaflet-receiving gap;

positioning the leaflet-receiving gap over the target valve leaflet;

further advancing the prosthetic sealing device from the delivery port such that the leaf-spring segments resiliently close over and capture the target valve leaflet; and

expanding the body to inhibit a flow of blood therethrough.

2. The method of claim 1 , wherein the body of the prosthetic sealing device comprises a self-expanding structure.

3. The method of claim 1 , wherein the body of the prosthetic sealing device comprises a balloon expandable structure.

4. The method of claim 1 , wherein the body of the prosthetic sealing device comprises a balloon.

5. The method of claim 1 , wherein the body of the prosthetic sealing device comprises a solid, flexible body.

6. The method of claim 1 , wherein the leaf-spring of the prosthetic sealing device comprise atraumatic barbs to securely grasp leaflets.

7. The method of claim 1 , wherein the leaf-spring and body of the prosthetic sealing device comprise one or more of a shape memory or super-elastic material.

8. The method of claim 7 , wherein the shape memory or super-elastic material comprises a nickel-titanium alloy.

9. A method as in claim 1 , wherein the target heart valve is a mitral valve.

10. A method as in claim 9 , wherein the target valve leaflet is a posterior leaflet.

11. A method as in claim 9 , wherein the target valve leaflet is an anterior leaflet.

12. A method as in claim 1 , wherein a non-captured leaflet remains free to function after the prosthetic sealing device has been implanted.

13. A method as in claim 1 , further comprising capturing a second valve leaflet with a second set of leaf springs on the prosthetic sealing device.

14. A method as in claim 1 , wherein the target heart valve is a tricuspid valve.

15. The method of claim 14 , wherein the prosthetic sealing device further comprises a second set of leaf-spring segments configured to secure any one of the three tricuspid valve leaflets, with the body attached in between or at a side of the second set of leaf-spring segments.

16. The method of claim 1 , wherein the prosthetic sealing device further comprises a second set of leaf-springs configured to secure any two of the three tricuspid valve leaflets, with the body attached in between or at a side of the second set of leaf-springs.

17. The method of claim 1 , wherein the prosthetic sealing device further comprises a second and a third set of leaf-springs configured to secure each of the three tricuspid valve leaflets, with the body attached in between or at a side of the second and third sets of leaf-springs.

18. The method of claim 1 , wherein the prosthetic sealing device further comprises a retrieval mechanism configured to allow for one or more of repositioning, recapture, or retrieval of the prosthetic sealing device during or after implantation.

Continuity (8)
Continuation 16735419 · Jan 6, 2020
Continuation PCTUS2018041016 · Jul 6, 2018
Provisional Application 62529373 · Jul 6, 2017
Provisional Application 62529389 · Jul 6, 2017
Provisional Application 62529380 · Jul 6, 2017
Provisional Application 62529392 · Jul 6, 2017
Provisional Application 62529384 · Jul 6, 2017
Related Publication 20230233325A1 · Jul 27, 2023
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