PROSTHESIS DEPLOYMENT SYSTEM

• US 20110054585A1
• Filed: 12/22/2006
• Published: 03/03/2011
• Est. Priority Date: 12/23/2005
• Status: Active Grant

• Current Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Original Assignee: Cook Incorporated (Cook Group Incorporated)
• Inventors: Osborne, Thomas A.
• Granted Patent: US 8,709,060 B2
• Time in Patent Office: Days
• US Class Current: 623/1.11
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61F 2002/9665 with additional retaining means

Abstract

A trigger wire release mechanism is disclosed that includes a control member for selectively releasing a trigger wire (22, 44) from a prosthesis retaining device. The control member includes an elongate body member (36) and a guide member (24, 25, 93, 94) slidably disposed on the elongate body member. The trigger wire 1 (22, 44) includes a distal end coupled to the prosthesis retaining device and a proximal end coupled to the guide member. The guide member (24, 25, 93, 94) can be moved from a distal end of the elongate body (36) to a proximal end of the elongate body, thereby disengaging the trigger wire (22, 44) from the retaining device. The control member may include a locking mechanism (120) for limiting the axial position of the guide member (24, 25, 93, 94) along the elongate body member (36). A prosthesis control member (81) is also disclosed. The prosthesis control member (81) is adapted to control the position of the prosthesis during deployment.

Claims

1. A trigger wire release mechanism for releasing a retained end of a prosthesis, the trigger wire release mechanism comprising:

a prosthesis retaining device arranged to engage an end of the prosthesis;

a trigger wire having a distal end and a proximal end, the distal end being arranged to selectively couple the prosthesis retaining device to the prosthesis;

a control mechanism comprising an elongate body member and a guide member, the elongate body member having a proximal end and a distal end, an exterior surface, and an interior surface, the interior surface defining a chamber extending longitudinally with the elongate body member;

wherein the trigger wire proximal end is operably coupled to the guide member in the chamber and the guide member is slidably disposed between a generally distal position and a generally proximal position along the elongate body member to selectively disengage the prosthesis retaining device from the prosthesis.

2. The trigger wire release mechanism of claim 1 wherein the control mechanism further comprises a locking mechanism to limit axial movement of the guide member along the elongate body member.

3. The trigger wire release mechanism of claim 2 wherein the locking mechanism allows the guide member to move from the distal end of the elongate body member to the proximal end of the elongate body member.

4. The trigger wire release mechanism of claim 3 wherein the locking mechanism prevents the guide member from moving from the proximal end of the elongate body member to the distal end of the elongate body member.

5. The trigger wire release mechanism of claim 2, wherein the locking mechanism comprises a stay that extends through an aperture formed in the elongate body member, the stay being coupled to the elongate body member by a biasing member that biases the stay so that a portion of the stay extends radially outwardly from the exterior surface of the elongate body member to limit the axial movement of the guide member, wherein radial compression of the biasing member causes the stay to retract through the aperture allowing the guide member to traverse the stay.

6. The trigger wire release mechanism of claim 2, wherein the locking mechanism releasably fixes the guide member to the elongate body member.

7. The trigger wire release mechanism of claim 2, wherein the locking mechanism comprises an engageable member on one of the wire guide and the elongate body member and a receiving member on the other of the elongate body member and the wire guide, the receiving member adapted to selectively receive the engageable member to fix the guide member to the elongate body member.

8. The trigger wire release mechanism of claim 1 wherein the guide member comprises a knob radially disposed about the elongate body member.

9. The trigger wire release mechanism of claim 8 wherein the knob comprises a body portion and a head portion, the trigger wire release mechanism further comprising a locking mechanism having an engageable member disposed on one of the head portion and the elongate body member and a receiving member disposed on the other of the elongate body member and the head portion, the head portion rotatably coupled to the body portion about a longitudinal axis of the elongate body member, wherein rotation of the head portion about the elongate body member selectively engages the engageable member and the receiving member, thereby preventing the knob from sliding along the elongate body member.

10. The trigger wire release mechanism of claim 1 wherein the control mechanism comprises a stop disposed on the proximal end of the elongate body member for retaining the guide member on the elongate body member.

11. The trigger wire release mechanism of claim 1 wherein the control mechanism further comprises a locking mechanism releasably fixing the guide member to the elongate body member and comprising an engageable member on one of the wire guide and the elongate body member and a receiving member on the other of the elongate body member and the wire guide, the receiving member adapted to selectively receive the engageable member to axially fix the guide member to the elongate body member.

12. The trigger wire release mechanism claim 1 comprising first and second trigger wires attached to respective first and second prosthesis retaining devices located at opposite ends of the prosthesis.

13. An introducer for a prosthesis, the introducer comprising a trigger wire release mechanism according to claim 1.

19. The introducer of claim 14 wherein the introducer comprises a trigger wire release mechanism according to claim 1.

23. The trigger wire release mechanism of claim 1, further comprising any two or more of the following:

the control mechanism further comprises a locking mechanism to limit axial movement of the guide member along the elongate body member;

the locking mechanism allows the guide member to move from the distal end of the elongate body member to the proximal end of the elongate body member;

the locking mechanism prevents the guide member from moving from the proximal end of the elongate body member to the distal end of the elongate body member;

the locking mechanism comprises a stay that extends through an aperture formed in the elongate body member, the stay being coupled to the elongate body member by a biasing member that biases the stay so that a portion of the stay extends radially outwardly from the exterior surface of the elongate body member to limit the axial movement of the guide member, wherein radial compression of the biasing member causes the stay to retract through the aperture allowing the guide member to traverse the stay;

the locking mechanism releasably fixes the guide member to the elongate body member;

the locking mechanism comprises an engageable member on one of the wire guide and the elongate body member and a receiving member on the other of the elongate body member and the wire guide, the receiving member adapted to selectively receive the engageable member to fix the guide member to the elongate body member;

the guide member comprises a knob radially disposed about the elongate body member;

the knob comprises a body portion and a head portion, the trigger wire release mechanism further comprising a locking mechanism having an engageable member disposed on one of the head portion and the elongate body member and a receiving member disposed on the other of the elongate body member and the head portion, the head portion rotatably coupled to the body portion about a longitudinal axis of the elongate body member, wherein rotation of the head portion about the elongate body member selectively engages the engageable member and the receiving member, thereby preventing the knob from sliding along the elongate body member;

the control mechanism comprises a stop disposed on the proximal end of the elongate body member for retaining the guide member on the elongate body member;

the control mechanism further comprises a locking mechanism releasably fixing the guide member to the elongate body member and comprising an engageable member on one of the wire guide and the elongate body member and a receiving member on the other of the elongate body member and the wire guide, the receiving member adapted to selectively receive the engageable member to axially fix the guide member to the elongate body member; and

first and second trigger wires attached to respective first and second prosthesis retaining devices located at opposite ends of the prosthesis.

24. The introducer of claim 14, further comprising any two or more of the following:

the control member comprises a generally deformable tubular body disposed about the elongate pusher, the tubular body comprising an inner lumen surface adapted to grip the elongate pusher, wherein the inner lumen surface has a smooth surface finish;

the control member comprises a generally deformable tubular body disposed about the elongate pusher, the tubular body comprising an inner lumen surface and an outer surface, wherein the inner lumen surface has a rough surface finish;

the control member is slidably disposed on the proximal portion of the elongate pusher;

the control member comprises silicone rubber;

a trigger wire release mechanism according to claim 1;

a haemostatic valve assembly radially disposed about a proximal end of the flexible sheath, wherein the haemostatic valve assembly comprises a disc valve and an iris-type valve; and

the flexible sheath comprises a portion comprising an elongate inner tube having a passageway extending longitudinally therethrough;

a coil having a plurality of longitudinally-positioned turns defining a plurality of spaces therebetween, the coil disposed radially about the inner tube; and

an elongate outer tube positioned around the coil and the inner tube, the outer tube connected to the inner tube through the plurality of spaces between the turns.

14. An introducer for a prosthesis, the introducer comprising:

an elongate pusher having a distal end in communication with a proximal end of the prosthesis;

a flexible sheath slidably disposed over the elongate pusher, the flexible sheath releasably covering the prosthesis in a compressed state, wherein the prosthesis is arranged to be released by withdrawing the flexible sheath proximally over the elongate pusher while controlling the position of the prosthesis; and

a control member disposed on a proximal portion of the elongate pusher capable of transferring a force between an operator and the elongate pusher, for controlling the position of the prosthesis while the sheath is withdrawn from the prosthesis.

15. The introducer of claim 14 wherein the control member comprises a generally deformable tubular body disposed about the elongate pusher, the tubular body comprising an inner lumen surface adapted to grip the elongate pusher, wherein the inner lumen surface has a smooth surface finish.

16. The introducer of claim 14 wherein the control member comprises a generally deformable tubular body disposed about the elongate pusher, the tubular body comprising an inner lumen surface and an outer surface, wherein the inner lumen surface has a rough surface finish.

17. The introducer of claim 14 wherein the control member is slidably disposed on the proximal portion of the elongate pusher.

18. The introducer of claim 14 wherein the control member comprises silicone rubber.

20. The introducer according to claim 14 further comprising a haemostatic valve assembly radially disposed about a proximal end of the flexible sheath, wherein the haemostatic valve assembly comprises a disc valve and an iris-type valve.

21. The introducer of claim 14 wherein the flexible sheath comprises a portion comprising:

an elongate inner tube having a passageway extending longitudinally therethrough;

a coil having a plurality of longitudinally-positioned turns defining a plurality of spaces therebetween, the coil disposed radially about the inner tube; and

an elongate outer tube positioned around the coil and the inner tube, the outer tube connected to the inner tube through the plurality of spaces between the turns.

22. (canceled)