PIVOT OPERATED VASCULAR INTERVENTION DEVICE DELIVERY SYSTEM

• US 20160074189A1
• Filed: 06/24/2015
• Published: 03/17/2016
• Est. Priority Date: 09/15/2014
• Status: Active Grant

• Current Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Original Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Inventors: Cummins, Sean
• Granted Patent: US 9,820,876 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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

Abstract

A vascular intervention device delivery system, such as for implanting a self expanding stent, includes a thumbwheel rotatably mounted in a handle. The thumbwheel includes a radially outward thumb surface and a radially outward toothed surface that may be moved into and out of contact with a catch by mounting the thumbwheel on a pivot plate within the handle. The pivot plate may be pivoted with respect to the handle between a locked position to prevent rotation of the thumbwheel, and an unlocked position that permits rotation of the thumbwheel. A catheter has a proximal end attached to the handle, and a distal carrier segment for mounting a vascular intervention device thereon. A retractable sheath is movable from a first position covering the distal carrier segment to a second position retracted proximally uncovering the distal carrier segment. A pull extends between the thumbwheel and the retractable sheath.

Claims

1. A vascular intervention device delivery system comprising:

a handle that includes a catch positioned therein;

a pivot plate mounted in the handle, and being pivotable about a first axis with respect to the handle between a locked position and an unlocked position, and the pivot plate supporting an axle that defines a second axis;

a thumbwheel rotatably mounted on the axle and having a radially outward thumb surface and a radially outward toothed surface;

wherein the radially outward toothed surface is in contact with the catch when the pivot plate is at the locked position to prevent rotation of the thumbwheel in a forward direction, and the radially outward toothed surface is out of contact with the catch when the pivot plate is at the unlocked position to permit rotation of the thumbwheel in a reverse direction;

a catheter with a proximal end attached to the handle, and a distal carrier segment for mounting a vascular intervention device thereon;

a retractable sheath movable from a first position covering the distal carrier segment, to a second position retracted proximally uncovering the distal carrier segment;

a pull extending between the thumbwheel and the retractable sheath; and

the retractable sheath moving responsive to rotation of the thumbwheel in the reverse direction.

2. The vascular intervention device delivery system of claim 1 including a spring operably positioned to bias the pivot plate toward the locked position;

and

the radially outward toothed surface includes a plurality of teeth in each of four ninety degree rotation angles.

3. The vascular intervention device delivery system of claim 2 wherein the radially outward toothed surface includes at least thirty teeth.

4. The vascular intervention device delivery system of claim 3 wherein the catch is shaped to receive at least one tooth of the radially outward toothed surface when the pivot plate is at the locked position.

5. The vascular intervention device delivery system of claim 4 wherein the first axis is parallel to the second axis;

and

the first axis is separated for the second axis by a distance that is greater than a diameter of the thumbwheel.

6. The vascular intervention device delivery system of claim 5 wherein both the first axis and the second axis are oriented perpendicular to the pull.

7. The vascular intervention device delivery system of claim 6 wherein the pull includes a metallic band.

8. The vascular intervention device of claim 1 including a self expanding stent positioned radially between the sheath and the distal carrier segment of the catheter.

9. The vascular intervention device delivery system of claim 8 including a spring operably positioned to bias the pivot plate toward the locked position.

10. The vascular intervention device delivery system of claim 9 wherein the catch is shaped to receive at least one tooth of the gear when the pivot plate is at the locked position;

the first axis is parallel to the second axis; and

the first axis is separated for the second axis by a distance that is greater than a diameter of the thumbwheel.

11. The vascular intervention device delivery system of claim 1 including a lock movable between a locked position and an unlocked position;

the lock includes a latch positioned in the handle and moveable along a line between the locked position at which the latch engages the radially outward thumb surface, and the unlocked position at which the latch is out of contact with the radially outward thumb surface; and

a pusher at least partially positioned outside the handle and being operably coupled to move the latch from the locked position to the unlocked position.

12. The vascular intervention device delivery system of claim 11 wherein the pusher includes a surface that engages a post that is attached to the latch and oriented perpendicular to the line.

13. The vascular intervention device delivery system of claim 12 including a spring operably positioned to bias the pivot plate toward the locked position.

14. The vascular intervention device delivery system of claim 13 wherein the catch is shaped to receive at least one tooth of the gear when the pivot plate is at the locked position;

the first axis is parallel to the second axis; and

the first axis is separated for the second axis by a distance that is greater than a diameter of the thumbwheel.

15. A method of operating a vascular intervention device delivery system that includes a thumbwheel rotatably mounted in the handle and having a radially outward thumb surface and a radially outward toothed surface;

the handle includes a catch positioned therein;

a pivot plate mounted in the handle, and being pivotable about a first axis with respect to the handle between a locked position and an unlocked position, and the pivot plate including an axle that defines a second axis;

the radially outward toothed surface is in contact with the catch when the pivot plate is at the locked position to prevent rotation of the thumbwheel in a forward direction, and the radially outward toothed surface is out of contact with the catch when the pivot plate is at the unlocked position to permit rotation of the thumbwheel in a reverse direction;

a catheter with a proximal end attached to the handle, and a distal carrier segment for mounting a vascular intervention device thereon;

a retractable sheath movable from a first position covering the distal carrier segment, to a second position retracted proximally uncovering the distal carrier segment;

a pull extending between the thumbwheel and the retractable sheath;

, and the retractable sheath moving responsive to rotation of the thumbwheel in a reverse direction, and the method comprising the steps of;

pivoting the pivot plate from the locked position to the unlocked position;

rotating the thumbwheel in the reverse direction to build up tension in the retractable sheath and pull without moving the retractable sheath relative to the distal carrier segment of the catheter;

uncovering a portion, which is less than all, of the distal carrier segment by continuing to rotate the thumbwheel in the reverse direction;

pausing rotation of the thumbwheel in the reverse direction;

pivoting the pivot plate from the unlocked position to the locked position;

maintaining tension in the pull and the retractable sheath by preventing rotation of the thumbwheel in the forward direction;

pivoting the pivot plate again from the locked position to the unlocked position; and

uncovering a remaining portion of the distal carrier segment by resuming rotation of the thumbwheel in the reverse direction.

16. The method of claim 15 wherein the steps of pivoting the pivot plate from the locked position to the unlocked position are performed by pushing the thumbwheel into the handle against the action of a spring.

17. The method of claim 16 wherein the step of pivoting the pivot plate from the unlocked position to the locked position is performed responsive to a force from the spring.

18. The method of claim 15 including a step of enabling operation of the thumbwheel by moving a lock from a locked position to an unlocked position.

19. The method of claim 18 wherein the step of moving a lock includes pushing a pusher to move a latch from engagement with the radially outward thumb surface to being out of contact with the radially outward thumb surface.