Containment sleeve and deployment device

• US 20080132879A1
• Filed: 11/30/2007
• Published: 06/05/2008
• Est. Priority Date: 11/30/2006
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Incorporated (Cook Group Incorporated), William Cook Europe ApS (Cook Group Incorporated)
• Inventors: Rasmussen, Erik E., Nimgaard, Lars S.
• Granted Patent: US 8,066,756 B2
• Time in Patent Office: Days
• US Class Current: 604/526
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/97 the outer sleeve being splittable

Abstract

A deployment device for deploying stents, stent-grafts and other implants into a patient includes a catheter (112) with a containment sheath (116). Held onto the catheter (112) is a stent-graft structure (120). The containment sheath (116) extends over the entirety of the stent graft section (122) so as to constrain it in its entirety on the catheter (112), until the sheath (116) is removed. The containment sheath (116) extends from the distal position (126) of the stent graft section (122) to the tip (114) and then into the central lumen (128) of the catheter (112). It may extend throughout the lumen (128) to the proximal end of the deployment device (10), in other words to the external manipulation section of the delivery device (10). The sheath (116) is withdrawn by pulling towards the external manipulation section of the delivery device. As this is effected, the containment sheath (116) is pulled over the end (114) of the catheter and into the central lumen (128) of the catheter (112). As this occurs the containment sheath (116) is in effect withdrawn into the catheter (112), thereby releasing the stent-graft section (122) gradually. Continued pulling will gradually pull the entirety of the containment sheath (116) into the open end of the catheter (112), thereby releasing the entirety of the stent-graft section (122).

Claims

1. A delivery device for delivering an implant into a patient, including a catheter provided with a distal region for holding a device to be located within a patient;

the catheter including an internal lumen therewithin;

a containment sheath being provided to contain an implant at or proximate the distal end of the catheter, wherein the containment sheath is drawable through the inner lumen of the catheter during delivery of the implant.

2. A delivery device according to claim 1, wherein at least a section of the containment sheath extends into the lumen of the catheter to an external manipulation portion of the delivery device.

3. A delivery device according to claim 1, including a drawing element attached to or integral with the containment sheath and operable to draw the containment sheath through the inner passage of the catheter.

4. A delivery device according to claim 3, wherein the drawing element is a wire or thread.

5. A delivery device according to claim 1, wherein the sheath is drawn through the tip of the catheter.

6. A delivery device according to claim 1, wherein the sheath is drawn directly towards an external manipulation section of the delivery device.

7. A delivery device according to claim 6, wherein the catheter is provided with an aperture therein at an intermediate position along its length, through which the sheath is made to pass during its removal.

8. A delivery device according to claim 1, wherein the containment sheath is made from a non-compliant material.

9. A delivery device according to claim 8, wherein the sheath is made from:

nylon, PTFE, PET, polyethylene or a polycaprolactam or any combination thereof.

10. A delivery device according to claim 1, wherein the distal end of the catheter is provided with an end member for smooth passage of the containment sheath as it is withdrawn into the inner passage of the catheter.

11. A delivery device according to claim 10, wherein the end portion is in the form of an enlarged head.

12. A delivery device according to claim 10, wherein the end portion is made of metal or other substantially rigid material.

13. A delivery device according to claim 10, wherein the end portion is rotatable relative to the catheter.

14. A delivery device according to claim 1, wherein the containment sheath is provided with longitudinal strengthening elements therewithin.

15. A delivery device according to claim 14, wherein the longitudinal strengthening elements are strands or wires of enforcement material.

16. A delivery device according to claim 1, including a handle at the proximal end of the delivery device coupled to at least one of the sheath or a pulling member attached to the sheath.

17. A delivery device according to claim 11, wherein the end portion is made of metal or other substantially rigid material.

18. A delivery device according to claim 11, wherein the end portion is rotatable relative to the catheter.

19. A delivery device according to claim 18, wherein the end portion is rotatable relative to the catheter.

20. A delivery device according to claim 10, including a handle at the proximal end of the delivery device coupled to at least one of the sheath or a pulling member attached to the sheath.