Prosthesis delivery apparatus and methods

Patent metadata

Field	Value
Publication number	US-9301863-B2
Application number	US-40086709-A
Country	US
Kind code	B2
Filing date	Mar 10, 2009
Priority date	Mar 10, 2009
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

A self-expanding prosthesis delivery system having an outer tubular structure and an inner tubular structure adapted for tracking over a guidewire and disposed in the outer tubular structure where the outer tubular structure and inner tubular structure form a fluid fillable space, which when filled with a fluid forms a fluid column that provides column strength from the delivery system handle to the stop of the delivery system.

First claim

What is claimed is:

1. A self-expanding prosthesis delivery system comprising:
an outer tubular structure having a proximal end and a distal end configured to receive a self-expanding prosthesis;
an inner tubular member adapted for tracking over a guidewire, having a proximal end portion fixed to a handle and a distal end portion, and being disposed in said outer tubular structure, at least a portion of said outer tubular structure being movable relative to said inner tubular member such that at least a portion of said outer tubular structure can be retracted, while said inner tubular member is held in a fixed position relative to said outer tubular structure, said outer tubular structure and inner tubular member being radially spaced from one another so as to form a fluid fillable space having first and second ends;
a first sealing member fixedly secured to said inner tubular member at a location proximal to said distal end portion of said inner tubular member to fluidly seal said first end of said fluid fillable space, said first sealing member extending from said inner tubular member to said outer tubular structure and being in sealing engagement with said outer tubular structure even during deployment of a self-expanding prosthesis therefrom; and
a second seal arranged at said second end of said fluid fillable space formed by said handle to fluidly seal said second end of said fluid fillable space,
wherein said outer tubular structure, inner tubular member, first sealing member, and said second seal form a fluid fillable chamber, which has a constant volume that remains constant when said outer tubular structure is retracted a sufficient distance relative to said inner tubular member to deploy a self-expanding prosthesis.

2. The system of claim 1 wherein said fluid fillable space is includes a bladder lining said fluid fillable space.

3. The system of claim 2 wherein said bladder includes at least two longitudinal movement accommodating expansion sections operably coupled to said outer tubular structure by a movable section of said bladder,
wherein said at least two longitudinal movement accommodating expansion sections are longitudinally expandable relative to said inner tubular member to thereby accommodate longitudinal movement between said outer tubular structure and said inner tubular member without sliding occurring between said outer tubular structure and said moveable section of said bladder, and
wherein said movable section of said bladder moves in unison with said outer tubular structure and is disposed between said at least two longitudinal movement accommodating expansion sections.

4. The system of claim 1 wherein said fluid fillable chamber is filled with a liquid.

5. The system of claim 4 wherein said liquid is a saline solution.

6. The system of claim 1 further including a fluid inlet port extending from said outer tubular structure and being fluidly coupled to said fluid fillable chamber.

7. The system of claim 6 further including a fluid source coupled to said inlet port.

8. The system of claim 1 wherein said fluid fillable chamber is without another tubular member extending parallel to and between said inner tubular member and said outer tubular structure.

9. The system of claim 1 further including a self-expanding prosthesis disposed in said outer tubular structure in the region of said distal end portion of said inner tubular member and abutting said first sealing member.

10. The system of claim 9 wherein said self-expanding prosthesis is a stent.

11. The system of claim 9 wherein said self-expanding prosthesis is a stent-graft.

12. The system of claim 9 wherein said fluid fillable chamber in a deployment configuration has a constant length when at least a portion of said outer tubular structure is moved relative to said inner tubular member to deploy the self-expanding prosthesis.

13. The system of claim 1 wherein said fluid fillable chamber has a length, wherein during retraction of the outer tubular structure the sufficient distance to deploy a self-expanding prosthesis from the outer tubular structure when the fluid fillable chamber is filled with a liquid, the length of the fluid fillable chamber remains constant.

14. The system of claim 1 wherein the first sealing member is closer to the distal end of the outer tubular structure than the proximal end of the outer tubular structure.

15. A prosthesis delivery system comprising:
an outer tubular structure;
an inner tubular member adapted for tracking over a guidewire, having a proximal end portion fixed to a handle and a distal end portion, and being disposed in said outer tubular structure, at least a portion of said outer tubular structure being movable relative to said inner tubular member such that at least a portion of said outer tubular structure can be retracted to deploy a prosthesis, while said inner tubular member is held in a fixed position, said outer tubular structure and inner tubular member being radially spaced from one another so as to form a fluid fillable space having first and second sealable ends; and
a tube extending from said outer tubular structure and being fluidly coupled to said fluid fillable space for filling said fluid fillable space with a fluid,
wherein said first and second sealable ends of said fluid fillable space are sealed and said outer tubular structure, inner tubular member, and first and second sealed ends form a fluid fillable chamber which has a constant length when the at least a portion of said outer tubular structure is moved relative to said inner tubular member.

16. The system of claim 15 further including a first seal fixedly secured to said inner tubular member at a location proximal to said distal end portion to define said first sealed end of said fluid fillable chamber, said first seal extending from said inner tubular member to said outer tubular structure and being in sealing engagement with said outer tubular structure, said first seal having a first surface facing said distal end portion of said inner tubular member and a second surface facing said fluid fillable chamber.

17. The system of claim 16 further including a second seal as part of said handle to define said second sealed end of said fluid fillable chamber.

18. The system of claim 17 further including a prosthesis disposed in said outer tubular structure in the region of said distal end portion of said inner tubular member.

19. A prosthesis delivery system comprising:
an outer tubular structure;
an inner tubular member adapted for tracking over a guidewire, having a proximal end portion fixed to a handle and a distal end portion fixed to a first sealing member, and being disposed in said outer tubular structure, said outer tubular structure being movable relative to said first sealing member and said inner tubular member such that at least a portion of said outer tubular structure can be retracted, while said first sealing member and said inner tubular member are held in a fixed position, said outer tubular structure and inner tubular member being radially spaced from one another so as to form a fluid fillable space having first and second ends;
an annular bladder positioned within said outer tubular structure and outside said inner tubular member to fluidly seal said fluid fillable space between said first sealing member extending from said inner tubular member to said outer tubular structure and being in sliding contact with said outer tubular structure, said first sealing member having a first surface facing said distal end po

Assignees

• Punga Karan
• Bingham Christopher
• Medtronic Vascular Inc

Inventors

• Punga Karan
• Bingham Christopher

Classifications

• A61F2/9517

  handle assemblies therefor · CPC title

• A61F2/95 Primary

  Instruments specially adapted for placement or removal of stents or stent-grafts · CPC title

• A61F2/966

  with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod · CPC title

• A61F2002/9517

  Human Necessities · mapped topic