Crimping device and method of use

• US 8,479,380 B2
• Filed: 08/27/2010
• Issued: 07/09/2013
• 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., Weston, Matthew W.
• Primary Examiner(s): Hong, John C
• Application Number:
  US12/870,593
• Publication Number:
  US 20110056064A1
• Time in Patent Office: 1,047 Days
• Field of Search: 294/46, 297/60, 295/15, 295/25, 292/82, 292/37, 297/51, 292/35, 295/08, 604/159, 604/510, 606/1, 623/1.12
• US Class Current: 29/760
• CPC Class Codes: A61F 2/2412 with soft flexible valve members, e.g. tissue valves shaped like natural valves check valves with flexible valve members in general F16K15/14
• CPC Class Codes: A61F 2/2427 Devices for manipulating or deploying heart valves during implantation
• 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
• CPC Class Codes: Y10T 29/49925 Inward deformation of aperture or hollow body wall
• CPC Class Codes: Y10T 29/53265 with work-holder for assembly
• CPC Class Codes: Y10T 29/53657 to apply or remove a resilient article [e.g., tube, sleeve, etc.]

Abstract

A crimping tool for crimping a stented heart valve comprises a housing having a front wall and a back wall, a compression assembly disposed between the front wall and the back wall and including a stent receiving chamber therewithin for receiving a stented heart valve, and a delivery device holder slidably coupled to the front wall of the housing. The compression assembly is movable between an uncrimped position and a crimped position to reduce the diameter of the stented heart valve.

Claims

1. A crimping tool comprising:

a housing having a front wall and a back wall;

a drive wheel movably positioned within the housing, the drive wheel including an actuation lever for moving the wheel between a first position and a second position;

a plurality of bars operably coupled to the drive wheel and having a proximal end and a distal end, the distal end of the bars including a chamfered leading edge and an opposing planar surface and the proximal end of the bars including first and second legs forming a proximal opening therebetween;

a chamber defined by the planar surfaces at the distal ends of the bars, the chamber being reducible in size from a first enlarged size to a second reduced size as the actuation lever moves from the first position to the second position; and

a delivery device holder mounted on the front wall, the delivery device holder comprising a sliding plate slidably coupled to the front wall via at least one engagement member that extends from the front wall through a corresponding horizontal slot of the sliding plate.

2. The crimping tool of claim 1, wherein the chamfered leading edge of each of the bars lies adjacent to the planar surface of an adjacent bar.

3. The crimping tool of claim 2, wherein the drive wheel is positioned within the proximal openings of the bars.

4. The crimping tool of claim 3, wherein each of the bars includes a drive pin slot and a guide pin slot.

5. The crimping tool of claim 4, wherein the drive wheel includes a plurality of drive wheel slots, the drive wheel operably coupled to the bars with a plurality of drive pins extending between the drive pin slots in the bars and the drive wheel slots.

6. The crimping tool of claim 5 further comprising:

a first plurality of radially extending slots in the front wall; and

a second plurality of radially extending slots in the back wall;

wherein each of the bars is operably coupled to the housing with a guide pin extending through the guide pin slot and into a corresponding one of the radially extending slots in the front wall and the back wall.

7. The crimping tool of claim 6, wherein the drive pin slot and the guide pin slot are positioned along an axis extending through a center plane of the bar.

8. The crimping tool of claim 1, wherein the delivery device holder comprises a seat member structured to receive a delivery device.

9. The crimping tool of claim 8, wherein the delivery device holder is slidable between a first position and a second position, the seat member being substantially aligned with a center axis of the chamber in the second position.

10. The crimping tool of claim 1, wherein the at least one delivery device holder engagement member is movable between a first position in which the delivery device holder is slidable relative to the front wall and a second position in which the delivery device holder is fixed relative to the front wall.