Transcatheter Valve Prosthesis Delivery System With Recapturing Feature and Method

• US 20140128963A1
• Filed: 11/02/2012
• Published: 05/08/2014
• Est. Priority Date: 11/02/2012
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Quill, Jason, Rothstein, Paul, Secord, Thomas, Johnson, Byron
• Granted Patent: US 9,675,456 B2
• Time in Patent Office: Days
• US Class Current: 623/2.11
• 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 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2250/0093 Ultrasound system, e.g. for inducing coagulation during eye surgery

Abstract

A delivery system for percutaneously deploying a valve prosthesis. The system includes a catheter assembly including a delivery sheath capsule and a handle having an oscillating device. The capsule is configured to compressively retain the valve prosthesis during implantation. After the valve prosthesis is partially exposed during implantation, the oscillating device can create a vibratory motion to reduce the friction between the valve prosthesis and the delivery sheath capsule in order to recapture the valve prosthesis.

Claims

1. A delivery device comprising:

a sheath;

an oscillator configured to transmit vibratory motion to the sheath at a defined frequency;

an inner shaft assembly including an intermediate portion providing a coupling structure configured to selectively engage a valve prosthesis, the inner shaft assembly being coupled to the body; and

a sheath capsule connected to the sheath, the capsule being slidably disposed over the inner shaft assembly and configured to compressively contain the valve prosthesis engaged with the coupling structure.

2. The delivery device of claim 1, further comprising a handle including a body coupled to the sheath, the body being attached to the oscillator.

3. The delivery device of claim 2, wherein the oscillator is positioned on the handle.

4. The delivery device of claim 1, wherein the oscillator includes a piezoelectric material.

5. The delivery device of claim 1, wherein the oscillator includes a magnet.

6. The delivery device of claim 5, wherein the oscillator includes a rotating surface configured to have an alternating charge.

7. The delivery device of claim 1, wherein the oscillator includes a motor attached to the body.

8. The delivery device of claim 7, wherein the oscillator includes a rotating cam attached to a motor output shaft.

9. The delivery device of claim 8, wherein the rotating cam is connected to the sheath.

10. The delivery device of claim 1, wherein the oscillator includes a motor attached to the body.

11. The delivery device of claim 10, wherein the oscillator includes a rotating cam attached to a motor output shaft.

12. The delivery device of claim 11, wherein the rotating cam is connected to the inner shaft assembly.

13. The delivery device of claim 1, wherein the inner shaft assembly includes a motion converter located proximal to the coupling structure, and

wherein the motion converter is configured to expand and contract with axial motion transmitted by the oscillator to impart radial motion onto the inner surface of the capsule.

14. The delivery device of claim 1, wherein the handle is coupled to the inner shaft assembly through a slider assembly.

15. A percutaneous valve prosthesis delivery system comprising:

a sheath configured to deliver the valve prosthesis to a native heart valve; and

an ultrasonic device configured to transmit ultrasonic energy at a defined frequency to the sheath to induce a vibratory motion.

16. A method of treating a valve disorder in a patient'"'"'s heart, comprising:

delivering a compressed valve prosthesis attached to a delivery device to an implantation site, the delivery device including a capsule that compressively contains the valve prosthesis;

proximally retracting the capsule relative to the compressed valve prosthesis to expose a region of the valve prosthesis such that the exposed region expands to an uncompressed state;

applying a vibration to the capsule and proximally advancing the valve prosthesis relative to the delivery device to cause the exposed region of the valve prosthesis to transition toward a compressed arrangement within an interior area of the capsule; and

proximally retracting the capsule relative to the compressed valve prosthesis to deploy the valve prosthesis at the implantation site.

17. The method of claim 16, further comprising rotating a cam connected to the delivery device to apply the vibration.

18. The method of claim 16, further comprising applying a voltage to a piezoelectric material attached to the delivery device to apply the vibration.

19. The method of claim 16, further comprising placing an ultrasonic device in proximity to the capsule and transmitting ultrasonic energy to the capsule at a specified frequency to apply the vibration.

20. The method of claim 16, further comprising rotating a surface having an alternating charge about a stationary magnet to apply the vibration.

21. The method of claim 16, further comprising:

activating an oscillator connected to the delivery device to induce an alternating axial motion along a shaft of the delivery system; and

converting the alternating axial motion to alternating radial motion to apply the vibration to the capsule.