Endovascular aortic repair delivery system with anchor

• US 20070250151A1
• Filed: 04/24/2006
• Published: 10/25/2007
• Est. Priority Date: 04/24/2006
• Status: Abandoned Application

• Current Assignee: Lifeshield Sciences LLC (Acacia Research Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Pereira, Peter
• Application Number:
  US11/409,579
• Publication Number:
  US 20070250151A1
• Time in Patent Office: Days
• US Class Current: 623/1.120
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument

Abstract

A delivery system is provided for deploying a prosthesis in a body lumen, the prosthesis having a radially compressed configuration. The delivery system includes a primary elongated member positioned coaxially within the prosthesis. A secondary elongated member surrounds a portion of the primary elongated member and a portion of the secondary elongated member is positioned coaxially within the prosthesis. The delivery system further includes a proximal anchor attached to the secondary elongated member. The anchor is adapted for engagement with the proximal end of the prosthesis, thereby maintaining the prosthesis in its radially compressed configuration. At least one outer sheath is adapted to be retracted to expose the prosthesis while the prosthesis is maintained in its radially compressed configuration. The primary elongated member and the secondary elongated member are axially movable relative to one another to disengage the prosthesis from the anchor and permit expansion of the radially compressed prosthesis.

Claims

1. A delivery system for deploying a prosthesis in a body lumen, the prosthesis having a proximal end, a distal end, and a radially compressed configuration, said delivery system having a proximal end and a distal end and comprising:

a primary elongated member positioned coaxially within the prosthesis, said primary elongated member comprising a proximal end and a distal end;

a secondary elongated member surrounding a portion of said primary elongated member, a portion of said secondary elongated member positioned coaxially within the prosthesis, said secondary elongated member comprising a proximal end and a distal end;

a proximal anchor attached to said secondary elongated member, said anchor adapted for engagement with the proximal end of the prosthesis, thereby maintaining the prosthesis in its radially compressed configuration; and

at least one outer sheath adapted to be retracted to expose the prosthesis while the prosthesis is maintained in its radially compressed configuration,

wherein said primary elongated member and said secondary elongated member are axially movable relative to one another to disengage the prosthesis from said anchor and permit expansion of the radially compressed prosthesis.

2. The delivery system of claim 1 wherein said proximal anchor comprises prongs adapted for engagement with apertures in the prosthesis.

3. The delivery system of claim 2 wherein said prongs of said proximal anchor extend toward said proximal end of said delivery system.

4. The delivery system of claim 1 further comprising a distal anchor attached to said primary elongated member.

5. The delivery system of claim 4 wherein each of said proximal anchor and said distal anchor comprises prongs adapted for engagement with apertures in the prosthesis.

6. The delivery system of claim 5 wherein said prongs of said proximal anchor extend toward said proximal end of said delivery system, and said prongs of said distal anchor extend toward said distal end of said delivery system.

7. The delivery system of claim 1 wherein said secondary elongated member further comprises a pilot portion proximally adjacent said proximal anchor to facilitate movement of said proximal anchor into said outer sheath.

8. The delivery system of claim 7 wherein said pilot portion is tapered toward a relatively smaller proximal end from a relatively larger cross section.

9. The delivery system of claim 1 wherein each of said primary elongated member and said secondary elongated member comprises a hypotube or single lumen extrusion.

10. The delivery system of claim 1 wherein the prosthesis comprises a stent or a stent-graft.

11. The delivery system of claim 1 wherein the prosthesis comprises a stent having an uncovered portion at its proximal end for receiving said proximal anchor.

12. The delivery system of claim 4 wherein the prosthesis comprises a stent having an uncovered portion at its distal end for receiving said distal anchor.

13. The delivery system of claim 4 wherein the prosthesis comprises a stent having an uncovered portion at each of its proximal end and its distal end for receiving said proximal anchor and said distal anchor, respectively.

14. A method for deploying a prosthesis in a body lumen, the prosthesis having a proximal end, a distal end, and a radially compressed configuration, said method comprising the steps of:

(a) inserting a delivery system into the body lumen, the delivery system having proximal end and a distal end and comprising

a primary elongated member positioned coaxially within the prosthesis, the primary elongated member having a proximal end and a distal end,

a secondary elongated member surrounding a portion of the primary elongated member, a portion of said secondary elongated member positioned coaxially within the prosthesis, the secondary elongated member having a proximal end and a distal end,

a proximal anchor attached to the secondary elongated member and engaged with the proximal end of the prosthesis and a distal anchor attached to the primary elongated member and engaged with the distal end of the prosthesis, and

an outer sheath;

(b) proximally retracting the outer sheath to expose the prosthesis while the prosthesis is maintained in its radially compressed configuration under tension between the proximal and distal anchors; and

(c) distally advancing the secondary elongated member to disengage the proximal end of the prosthesis from the proximal anchor to allow expansion of the proximal end of the prosthesis.

15. The method of claim 14 further comprising the steps of:

(d) proximally retracting the primary elongated member to disengage the distal end of the prosthesis from the distal anchor to allow expansion of the distal end of the prosthesis;

(e) securing the proximal anchor and the distal anchor inside the outer sheath; and

(f) removing the delivery system from the body lumen.

16. A method for deploying a prosthesis in a body lumen, the prosthesis having a proximal end, a distal end, and a radially compressed configuration, said method comprising the steps of:

(a) inserting a delivery system into the body lumen, the delivery system having a proximal end and a distal end and comprising

a primary elongated member positioned coaxially within the prosthesis, the primary elongated member having a proximal end and a distal end,

a secondary elongated member surrounding a portion of the primary elongated member, a portion of the secondary elongated member positioned coaxially within the prosthesis, the secondary elongated member having a proximal end and a distal end,

a proximal anchor attached to the secondary elongated member and engaged with the proximal end of the prosthesis,

a proximal outer sheath, and

a distal outer sheath mated with the proximal outer sheath;

(b) distally advancing the distal outer sheath away from the mating proximal outer sheath to expose the prosthesis to allow expansion of the distal end of the prosthesis while the proximal end of the prosthesis is maintained in its radially compressed configuration; and

(c) distally advancing the secondary elongated member to disengage the proximal end of the prosthesis from the proximal anchor to allow expansion of the proximal end of the prosthesis.

17. The method of claim 16 further comprising the steps of:

(d) securing the proximal anchor inside the proximal outer sheath;

(e) mating the distal outer sheath with the proximal outer sheath; and

(f) removing the delivery system from the body lumen.