Surgical delivery device and method of use

• US 9,555,528 B2
• Filed: 08/27/2010
• Issued: 01/31/2017
• Est. Priority Date: 08/28/2009
• Status: Active Grant

• Current Assignee: Medtronic 3F Therapeutics, Inc. (Medtronic Plc)
• Original Assignee: Medtronic 3F Therapeutics, Inc. (Medtronic Plc)
• Inventors: Malewicz, Andrzej M., Elizondo, David, Weston, Matthew W.
• Primary Examiner(s): ANDERSON, GREGORY A
• Application Number:
  US12/870,584
• Publication Number:
  US 20110060404A1
• Time in Patent Office: 2,349 Days
• Field of Search: 623/2.11
• US Class Current: 1/1
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2/2427 Devices for manipulating or deploying heart valves during implantation
• CPC Class Codes: A61F 2/2436 Deployment by retracting a sheath
• CPC Class Codes: A61F 2/2439 Expansion controlled by filaments
• CPC Class Codes: A61F 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument
• CPC Class Codes: B25B 27/10 inserting fittings into hoses

Abstract

A delivery device for a stented heart valve includes a handle, an elongate shaft extending from a distal end of the handle, and a conical housing having a proximal end coupled to the elongate shaft and an open distal end, the conical housing having a conical lumen therein with a first internal diameter adjacent to the proximal end of the conical housing and a larger second internal diameter adjacent to the open distal end of the conical housing.

Claims

1. A delivery device for a stented heart valve comprising:

a handle;

an elongate shaft affixed to and extending from a distal end of the handle; and

a conical housing having a proximal base portion fixed to and disposed about an exterior of the elongate shaft via a central passage defined along the proximal base portion within which the elongate shaft is inserted and an open distal end, the conical housing having a conical lumen therein with a first internal diameter adjacent to the proximal base portion of the conical housing and a larger second internal diameter at the open distal end of the conical housing, wherein the conical lumen has a constant tapering diameter from the open distal end;

wherein the first internal diameter of the conical lumen is larger than a diameter of the central passage.

2. The delivery device of claim 1, wherein the elongate shaft includes a shaft lumen structured to provide a pathway between the conical lumen of the conical housing and an interior of the handle.

3. The delivery device of claim 2, wherein the conical housing is formed from a transparent material.

4. The delivery device of claim 2, wherein the handle includes a handle lumen in a proximal end thereof.

5. The delivery device of claim 4, wherein the handle lumen is substantially aligned with and open to the shaft lumen.

6. The delivery device of claim 5, further comprising an engagement mechanism carried by the handle, the engagement mechanism including a trigger projecting through and to an outside of the handle for moving the engagement mechanism between an engaged position and a disengaged position.

7. The delivery device of claim 6, wherein the trigger is pivotally coupled to a pivot pin attached to the handle.

8. The delivery device of claim 7, wherein the engagement mechanism includes a first elongate gripper on the trigger and a second elongate gripper on the handle, wherein the first and second elongate grippers are located within the interior of the handle between the handle lumen and the shaft lumen such that the first and second elongate grippers selectively clamp a suture passing through the shaft lumen and the handle lumen.

9. The delivery device of claim 8, wherein the second elongate gripper is fixed relative to the handle and the first elongate gripper is movable relative to the second elongate gripper between an engaged position and a disengaged position.

10. The delivery device of claim 9, wherein the first and second elongate grippers are cylindrical in shape.

11. The delivery device of claim 9, further comprising at least one torsion spring operably coupled to the trigger, the torsion spring biasing the engagement mechanism in the engaged position.

12. The delivery device of claim 11, further comprising a retention assembly operable to lock the engagement mechanism in the disengaged position.

13. The delivery device of claim 12, wherein the retention assembly includes a coil spring and a retention pin structured to be received within a retention pin slot in the trigger.

14. The delivery device of claim 13, wherein the handle includes a mating slot that is structured to receive the retention pin to lock the engagement mechanism in the disengaged position.

15. The delivery device of claim 14, further comprising a push button slidably positioned within the mating slot, wherein actuating the push button moves the engagement mechanism from the disengaged position back to the engaged position.

16. The delivery device of claim 1, in combination with a stented heart valve, the stented heart valve comprising:

a support stent having an inflow end and an outflow end;

a replacement heart valve positioned within and coupled to the support stent;

a cloth covering on the inflow end of the support stent, wherein the cloth covering terminates at an edge opposite the inflow end and axially spaced from the outflow end such that the support stent is exposed relative to the cloth covering between the edge and the outflow end; and

a control suture sewn into the cloth covering at a suture engagement location;

wherein the combination is configured to provide a final loaded state in which the outflow end is disposed within the conical housing and the suture engagement location is outside of the conical housing, the final loaded state including the control suture retaining the inflow end in a radially crimped configuration.

17. The delivery device of claim 16, wherein the cloth covering is formed from polyester.

18. The delivery device of claim 16, wherein the support stent is formed from Nitinol.

19. The delivery device of claim 16, wherein the support stent includes a plurality of support posts, each of the support posts including a slot that is structured to receive a commissural tab for coupling the replacement heart valve to the support stent.

20. The delivery device of claim 19, wherein the control suture is threaded through a plurality of suture apertures in the cloth covering.

21. The delivery device of claim 20, wherein the cloth covering includes two suture apertures between each pair of adjacent support posts.

22. The delivery device of claim 16, wherein terminal ends of the control suture are tied together to form a continuous control suture loop.

23. The delivery device of claim 16, wherein the constant tapering diameter of the conical lumen extends from the open distal end to a second end opposite the open distal end, and further wherein an axial length of the conical lumen is defined as an axial distance from the open distal end to the second end, and even further wherein the axial length of the conical lumen is less than an axial length of the stented heart valve, the delivery device in combination with the stented heart valve being configured such that upon final loading of the stented heart valve into the conical housing, at least a portion of the inflow end of the stented heart valve extends distally beyond and outside of the open distal end.

24. The delivery device of claim 16, wherein the combination is configured such that in the final loaded state, an entirety of the support stent is retained in a radially crimped configuration.

25. The delivery device of claim 16, further comprising an engagement mechanism carried by the handle, wherein the final loaded state includes the control suture extending from the stented heart valve, through a lumen of the elongate shaft and to the handle, and the control suture engaged by the engagement mechanism at the handle.