Dual Capture Device for Stent Graft Delivery System and Method for Capturing a Stent Graft

• US 20100030318A1
• Filed: 03/31/2009
• Published: 02/04/2010
• Est. Priority Date: 09/03/2003
• Status: Active Grant

• Current Assignee: Bolton Medical, Inc. (Terumo Corporation)
• Original Assignee: Bolton Medical, Inc. (Terumo Corporation)
• Inventors: Berra, Humberto
• Granted Patent: US 8,500,792 B2
• Time in Patent Office: Days
• US Class Current: 623/1.110
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/86 Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• 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 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/828 Means for connecting a plurality of stents allowing flexibility of the whole structure
• CPC Class Codes: A61F 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
• CPC Class Codes: A61F 2002/9528 for retrieval of stents
• CPC Class Codes: A61F 2230/0054 V-shaped

Abstract

A delivery system for delivering and deploying stents with proximal and distal apices includes first and second hollow lumens and a hollow apex release lumen, the first lumen having a distal end and an interior extending along a longitudinal axis, the second lumen having a distal end and being slidably disposed about the first lumen, and the apex release lumen having a distal end and being slidably disposed about the second lumen. A proximal apex capture device of the delivery system includes a first distal capture portion fixedly connected to the first lumen, the first distal capture portion having a first distal portion with a proximal end and a proximal stopper having a distal side disposed in a plane approximately perpendicular to the longitudinal axis, being disposed at a first proximal distance from the proximal end of the first distal portion, and defining first stopping surface portions. A first proximal capture portion is fixedly connected to the distal end of the apex release lumen and has fingers extending toward the first distal capture portion in a distal direction, the fingers defining a first interior cavity shaped to receive the first proximal stopper therein, the first distal capture portion and the first proximal capture portion being formed to hold the distal apices there between and, together, defining a first stent captured state in which the first proximal stopper is received in the first interior cavity and the first proximal capture portion approximately closes off the first interior cavity along the longitudinal axis.

Claims

1. A delivery system for delivering and deploying stents having proximal and distal apices, the delivery system comprising:

a hollow first lumen having a distal end and an interior extending along a longitudinal axis;

a hollow second lumen having a distal end and being slidably disposed about said first lumen;

a hollow apex release lumen having a distal end and being slidably disposed about said second lumen;

a distal apex capture device, including;

a first distal capture portion fixedly connected to said distal end of said first lumen, said first distal capture portion having;

a first distal portion with a first proximal end; and

a first proximal stopper having a distal side disposed in a plane approximately perpendicular to said longitudinal axis, being disposed at a proximal distance from said proximal end of said first distal portion, and defining first stopping surface portions; and

a first proximal capture portion fixedly connected to said distal end of said second lumen and having fingers extending toward said first distal capture portion in a distal direction, said fingers defining a first interior cavity shaped to receive said first proximal stopper therein, said proximal and distal capture portions being formed to hold said proximal apices therebetween and, together, defining a first stent captured state in which said first proximal stopper is received in said first interior cavity and said first distal capture portion approximately closes off said first interior cavity along said longitudinal axis; and

a proximal apex capture device, including;

a second distal capture portion fixedly connected to said second lumen, said second distal capture portion having;

a second distal portion with a proximal end; and

a second proximal stopper having a distal side disposed in a plane approximately perpendicular to said longitudinal axis, being disposed at a second proximal distance from said proximal end of said second distal portion, and defining second stopping surface portions; and

a second proximal capture portion fixedly connected to said distal end of said apex release lumen and having fingers extending toward said second distal capture portion in the distal direction, said fingers defining a second interior cavity shaped to receive said second proximal stopper therein, said second distal capture portion and said second proximal capture portion being formed to hold the distal apices therebetween and, together, defining a second stent captured state in which said second proximal stopper is received in said second interior cavity and said second proximal capture portion approximately closes off said second interior cavity along said longitudinal axis.

2. The delivery system according to claim 1, wherein:

said proximal end of said first distal portion and said first stopper define a first stent apex cavity; and

said first proximal and said first distal capture portions are formed to hold the proximal apices (32) in said first stent apex cavity.

3. The delivery system according to claim 1, wherein:

said proximal end of said second distal portion and said second stopper define a second stent apex cavity; and

said second proximal and said second distal capture portions are formed to hold the distal apices in said second stent apex cavity.

4. The delivery system according to claim 1, wherein:

said first and second lumens each have distal ends;

said first stent captured state exists when said distal ends of said first and second lumens are moved adjacent one another; and

said second stent captured state exists when said second lumen and said apex release lumen are moved adjacent one another.

5. The delivery system according to claim 1, wherein:

said proximal end of said first distal portion and said first stopper define a first stent apex cavity;

said first proximal and said first distal capture portions are formed to hold the first proximal apices in said first stent apex cavity; and

relative movement of said first and second lumens moves said first proximal and said first distal capture portions with respect to one another to substantially close said first stent apex cavity and, thereby, place said first proximal and said first distal capture portions in said first captured state.

6. The delivery system according to claim 1, wherein:

said proximal end of said second distal portion and said second proximal stopper define a second stent apex cavity;

said second proximal and said second distal capture portions are formed to hold the second proximal apices in said second stent apex cavity; and

relative movement of said second and said apex release lumen moves said second proximal and said second distal capture portions with respect to one another to substantially close said second stent apex cavity and, thereby, place said second proximal and said second distal capture portions in said second captured state.

7. The delivery system according to claim 1, wherein:

said first lumen has a proximal end;

said second lumen has a proximal end; and

an apex release assembly operatively connects said proximal end of said first lumen to said proximal end of said second lumen.

8. The delivery system according to claim 7, wherein said apex release assembly has:

a first release part connected to said first lumen;

a second release part connected to said second lumen; and

a locking part that selectively locks said first release part with respect to said second release part to, thereby, selectively secure said first lumen to said second lumen along said longitudinal axis.

9. The delivery system according to claim 8, wherein said locking part secures said first and second lumens in a form-locking connection.

10. The delivery system according to claim 8, wherein movement of said first and second release parts with respect to one another causes a corresponding movement of said first proximal and said first distal capture portions with respect to one another to, thereby, release or capture the proximal apices inside said distal apex capture device.

11. The delivery system according to claim 10, wherein:

a separating movement of said first and second release parts causes a corresponding movement of said first proximal and said first distal capture portions with respect to one another to, thereby, substantially close said first interior cavity of said fingers of said first proximal capture portion; and

an adjoining movement of said first and second release parts causes a corresponding movement of said first proximal and said first distal capture portions with respect to one another to, thereby, open said first interior cavity of said fingers of said first proximal capture portion.

12. The delivery system according to claim 10, wherein:

a separating movement of said first and second release parts causes a corresponding movement of said first proximal and said first distal capture portions with respect to one another to, thereby, capture the proximal apices; and

an adjoining movement of said first and second release parts causes a corresponding movement of said first proximal and said first distal capture portions with respect to one another to, thereby, release the proximal apices.

13. The delivery system according to claim 8, wherein said locking part is one of a lever and a clip.

14. The delivery system according to claim 1, wherein:

a stent to be deployed has a given number of the proximal apices and given number of distal apices;

a number of said fingers of said proximal apex capture device is equal to a number of the proximal apices; and

a number of said fingers of said second proximal capture device is equal to a number of the distal apices.

15. The delivery system according to claim 1, wherein:

said second stopper has extensions extending in a radial direction away from said longitudinal axis;

a number of said extensions of said second stopper is equal to said number of said second stopping surface portions; and

each of said second extensions includes one of said second stopping surface portions.

16. The delivery system according to claim 1, wherein said second distal capture portion has an intermediate portion connecting said second distal portion to said second stopper at a proximal distance from said proximal end of said second distal portion.

17. A delivery system for delivering and deploying stents with proximal and distal apices, the delivery system comprising:

at least first and second hollow lumens and a hollow apex release lumen, the first lumen having a distal end and an interior extending along a longitudinal axis, the second lumen having a distal end and being slidably disposed about the first lumen, and the apex release lumen having a distal end and being slidably disposed about said second lumen;

a distal apex capture device; and

a proximal apex capture device including;

a first distal capture portion fixedly connected to said first lumen, said first distal capture portion having;

a first distal portion with a proximal end; and

a proximal stopper having a distal side disposed in a plane approximately perpendicular to said longitudinal axis, being disposed at a first proximal distance from said proximal end of said first distal portion, and defining first stopping surface portions; and

a first proximal capture portion fixedly connected to said distal end of said apex release lumen and having fingers extending toward said first distal capture portion in a distal direction, said fingers defining a first interior cavity shaped to receive said first proximal stopper therein, said first distal capture portion and said first proximal capture portion being formed to hold the distal apices therebetween and, together, defining a first stent captured state in which said first proximal stopper is received in said first interior cavity and said first proximal capture portion approximately closes off said first interior cavity along said longitudinal axis.

18. The delivery system according to claim 17, wherein the distal apex capture device comprises:

a second distal capture portion fixedly connected to said distal end of said second lumen, said second distal capture portion having;

a second distal portion with a second proximal end; and

a second proximal stopper having a distal side disposed in a plane approximately perpendicular to said longitudinal axis, being disposed at a proximal distance from said proximal end of said second distal portion, and defining second stopping surface portions; and

a second proximal capture portion fixedly connected to said distal end of said second lumen and having fingers extending toward said second distal capture portion in the distal direction, said fingers defining a second interior cavity shaped to receive said second proximal stopper therein, said proximal and distal capture portions being formed to hold said proximal apices therebetween and, together, defining a second stent captured state in which said second proximal stopper is received in said second interior cavity and said second distal capture portion approximately closes off said second interior cavity along said longitudinal axis.