Transcatheter delivery system with wheel actuation

Patent metadata

Field	Value
Publication number	US-10898324-B2
Application number	US-201815976282-A
Country	US
Kind code	B2
Filing date	May 10, 2018
Priority date	May 15, 2017
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

A delivery device 1010 for a collapsible prosthetic heart valve 200, the delivery device including an inner shaft 1026, a distal sheath 1024 disposed about a portion of the inner shaft and forming a compartment 1023 with the inner shaft, the compartment being adapted to receive the prosthetic heart valve, the inner shaft and the distal sheath being movable relative to one another, and a handle 1020 including a frame 1030 having a longitudinal axis, a proximal end and a distal end, the handle further including a deployment actuator 1021 and a hub 1100, each of the deployment actuator and the hub being independently capable of opening and closing the compartment, the hub further including a hub actuator 1600 coupled to the inner shaft.

First claim

The invention claimed is:

1. A delivery device for a collapsible prosthetic heart valve, the delivery device comprising:
an inner shaft;
a distal sheath disposed about a portion of the inner shaft to form a compartment sized to receive the prosthetic heart valve, the inner shaft and the distal sheath being movable relative to one another via a deployment actuator; and
a handle including a frame having a longitudinal axis, and the deployment actuator operatively connected to the distal sheath, the deployment actuator including a clutch that rotationally couples the deployment actuator to the distal sheath in a first condition and rotationally decouples the deployment actuator from the distal sheath in a second condition, wherein the clutch comprises a clutch plate rotationally locked to a wheel shell of the deployment actuator in both a first rotational direction and second rotational direction opposite the first rotational direction; and
a compression spring disposed between the clutch plate and the wheel shell.

2. The delivery device of claim 1 , wherein the clutch includes a drive nut assembled within the wheel shell.

3. The delivery device of claim 2 , wherein the drive nut includes a plurality of first teeth, each having a sloped portion.

4. The delivery device of claim 3 , wherein the clutch plate includes a plurality of second teeth, complementary to the first teeth, the second teeth being meshed with the plurality of first teeth of the drive nut.

5. The delivery device of claim 2 , further wherein the compression spring exerts a force pushing the clutch plate against the drive nut.

6. The delivery device of claim 5 , wherein the force exerted by the compression spring pushes the clutch plate against the drive nut in an axial direction.

7. The delivery device of claim 5 , wherein the clutch plate is configured to be disposed circumferentially around a threaded rod.

8. The delivery device of claim 5 , wherein the compression spring is concentrically engaged with the drive nut within the wheel shell.

9. The delivery device of claim 2 , wherein the clutch plate is engaged with the drive nut assembled within the wheel shell.

10. The delivery device of claim 2 , wherein the drive nut includes a plurality of first teeth, each having a perpendicular portion.

11. The delivery device of claim 2 , wherein the drive nut is freely rotatable relative to the wheel shell in the second condition.

12. A clutch in a delivery device for a collapsible prosthetic heart valve, the clutch comprising:
a wheel shell configured to retract a distal sheath of the delivery device;
a clutch plate assembled within the wheel shell and rotationally locked to the wheel shell in both a first rotational direction and second rotational direction opposite the first rotational direction;
a compression spring disposed between the clutch plate and the wheel shell; and
a drive nut positioned adjacent to the clutch plate, wherein the compression spring provides an engagement force that pushes the clutch plate against the drive nut, and wherein the clutch is configured to rotationally couple the wheel shell to the distal sheath in a first condition and to rotationally decouple the wheel shell from the distal sheath in a second condition.

13. The clutch of claim 12 , wherein the drive nut has a center opening configured to receive a threaded rod.

14. The clutch of claim 12 , wherein the drive nut includes a plurality of first teeth, each having a sloped portion.

15. The clutch of claim 14 , wherein the clutch plate includes a plurality of second teeth complementary to the first teeth, the second teeth being meshed with the plurality of first teeth of the drive nut.

Assignees

• St Jude Medical Cardiology Div Inc

Inventors

• Morrissey Michael Shane
• Frohman Bruce Edward
• Metz Michael William
• Skujins Janis Paulis
• Copeland David John
• Brown Spencer Patrick

Classifications

• A61F2/95 Primary

  Instruments specially adapted for placement or removal of stents or stent-grafts · CPC title

• A61F2/9517

  handle assemblies therefor · CPC title

• A61F2/2436 Primary

  Deployment by retracting a sheath · CPC title

• A61F2/2418

  Scaffolds therefor, e.g. support stents · CPC title