Pushable Implant Delivery System

• US 20170079820A1
• Filed: 09/19/2016
• Published: 03/23/2017
• Est. Priority Date: 09/18/2015
• Status: Active Grant

• Current Assignee: Terumo Corporation
• Original Assignee: Microvention Incorporated (Terumo Corporation)
• Inventors: Lam, Cang, Vong, Shirley, Kelley, Greg
• Granted Patent: US 10,322,020 B2
• Time in Patent Office: Days
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• 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
• CPC Class Codes: A61F 2002/9665 with additional retaining means
• CPC Class Codes: A61F 2230/0069 cylindrical

Abstract

An implant delivery system is described, having a distal tip and outer sheath that remain in a fixed position during implant delivery. A pusher mechanism within the sheath pushes an implant out of a gap between a distal end of the sheath and the distal tip.

Claims

1. A vascular implant delivery device comprising:

an elongated member sized for delivery within a vascular system and having a distal end and a proximal end;

a pusher element connected to and sliding relative to said elongated member; and

,

an implant releasably connected to said pusher element;

wherein said pusher element is configured to slide towards said distal end of said elongated member to deploy said implant while said distal end of said elongated member maintains a fixed position within said vascular system.

2. The vascular implant delivery device of claim 1, further comprising a tubular sheath disposed around said elongated member and said pusher element;

wherein said tubular sheath is fixed from longitudinal movement relative to said elongated member.

3. The vascular implant delivery device of claim 2, wherein a distal end of said tubular sheath is spaced proximally from said distal end of said elongated member so as to create a circumferential gap through which said implant is pushed through.

4. The vascular implant delivery device of claim 1, wherein said pusher element is disposed around said elongated member.

5. The vascular implant delivery device of claim 1, wherein said pusher element further comprises a plurality of depressions that are each sized to contain a bulb member fixed to said implant.

6. The vascular implant delivery device of claim 1, wherein said pusher element is connected to a pusher rod;

said pusher rod extending to a proximal end of said vascular implant delivery device to allow hand-actuated axial movement of said pusher element.

7. The vascular implant delivery device of claim 1, wherein said distal end of said elongated member has a proximally tapered portion and a distally tapered portion.

8. The vascular implant delivery device of claim 1, further comprising a passage opening at said proximal end and said distal end of said elongated member;

said passage being sized to accommodate a guidewire.

9. A vascular implant delivery device comprising:

an elongated member sized for delivery within a vascular system and having a distal end and a proximal end;

a pusher element connected to and sliding relative to said elongated member; and

,

an implant releasably connected to said pusher element;

a tubular sheath disposed over said elongated tubular member and said pusher element;

wherein said elongated member maintains a fixed position relative to said tubular sheath and within said vascular system.

10. The vascular implant delivery device of claim 9, wherein said implant is a stent having a plurality of bulb members that are releasably engaged in a plurality of depressions on an outer surface of said pusher element;

said stent extending at least partially between said pusher element and said distal end of said elongated member.

11. The vascular implant delivery device of claim 10, wherein said pusher element is disposed around said elongated member and is connected to a pusher rod that extends to a proximal end of said vascular implant delivery device.

12. The vascular implant delivery device of claim 11, wherein said elongated member further comprises a guidewire passage.

13. The vascular implant delivery device of claim 12, wherein said distal end of said elongated member further comprises a proximally conical surface and a distally conical surface.

14. The vascular implant delivery device of claim 9, further comprising a gap between a distal end of said tubular sheath and said distal end of said elongated member;

said gap sized for passage of said implant when distally pushed through by said pusher element.

15. The vascular implant delivery device of claim 9, further comprising a distal end member that is slidable at said distal end of said elongated member and is releasably connected with a distal end of said implant.

16. A method of deploying an implant, comprising:

advancing a pusher element distally within a delivery device while maintaining a fixed position of a distal end of said delivery device; and

,

pushing an implant out of said distal end of said delivery device.

17. The method of claim 16, wherein said maintaining a fixed position of said distal end of said delivery device further comprises maintaining a fixed position of an outer sheath and an inner tubular member position within said outer sheath.

18. The method of claim 17, wherein said pushing said implant out of said distal end of said delivery device is followed by retracting said implant back into said delivery device.

19. The method of claim 17, wherein said pushing said implant out of said delivery device includes disengaging said implant from said pusher element.