Implant delivery system with interlocked RX port orientation

• US 20060259120A1
• Filed: 05/12/2006
• Published: 11/16/2006
• Est. Priority Date: 05/12/2005
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: ev3, Inc. (Medtronic Plc)
• Inventors: Hashw, Adel, Vongphakdy, Khamla, Wang, Lixiao, Wang, Huisun
• Granted Patent: US 8,597,276 B2
• Time in Patent Office: Days
• US Class Current: 623/1.110
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• 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 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
• CPC Class Codes: A61F 2002/9583 Means for holding the stent on the balloon, e.g. using protrusions, adhesives or an outer sleeve
• CPC Class Codes: A61F 2002/9665 with additional retaining means
• CPC Class Codes: A61M 25/09 Guide wires
• CPC Class Codes: Y10T 29/49938 Radially expanding part in cavity, aperture, or hollow body

Abstract

A medical implant delivery system maintains an orientation between a guidewire lumen of an inner member of the system and a rapid-exchange port in an outer member. The medical device is disposed intermediate the inner and outer members and in friction or pressure-fit contact with the outer member. Once the guidewire lumen of the inner member and the rapid exchange port of the outer member are oriented, the friction or pressure-fit operates to maintain the orientation until deployment of the medical implant. Orientation is further maintained by a telescoping coupling of the guide wire lumen with the rapid exchange port.

Claims

1. A system for delivering a medical device within a body lumen comprising:

a tubular catheter having proximal and distal ends and comprising an outer shaft member slidably disposed about an inner shaft member;

a medical device disposed intermediate the inner and outer shaft members;

a guide wire lumen extending at least partially through each of the inner shaft member and the outer shaft member, the guide wire lumen opening exterior of the outer shaft member at a location distal of the catheter proximal end; and

an alignment mechanism maintaining alignment of the guide wire lumen relative to the outer shaft member and the inner shaft member.

2. The system of claim 1 wherein the outer shaft member is tubular and the alignment mechanism comprises:

a contact surface disposed about an inner circumference of the outer shaft member, said surface in contact with at least a portion of the medical device.

3. The system of claim 2 wherein the contact surface further comprises:

a plurality of axial ridges disposed along the inner circumference of the outer shaft member.

4. The system of claim 2 wherein the medical device comprises a tubular self-expanding stent having first and second ends.

5. The system of claim 4 wherein the first end of the self-expanding stent frictionally engages the contact surface on the inner circumference of the outer shaft member.

6. The system of claim 4 wherein the first end of the self-expanding stent is releaseably coupled to the inner shaft member.

7. The system of claim 1 wherein the alignment mechanism comprises:

a tubular inner shaft extension coupled to the inner shaft member and communicating with the portion of the guide wire lumen extending at least partially through the inner shaft member.

8. The system of claim 7 wherein the alignment mechanism further comprises:

a tubular outer shaft extension defining the portion of the guide wire lumen extending at least partially through the outer shaft member and communicating with the exterior of the outer shaft member.

9. The system of claim 8 wherein the inner shaft extension is slidably coupled to and in communication with the outer shaft extension.

10. The system of claim 9 wherein the relative position of the inner shaft member to the outer shaft member defines a usable length of the guide wire lumen within the catheter.

11. The system of claim 9 wherein the inner shaft extension has an outer diameter less than an inner diameter of the outer shaft extension and is slidably received within the outer shaft extension.

15. The system of claim 2 wherein the first length of the inner shaft guide wire lumen and the first length of the outer shaft guide wire lumen are sized so that the inner shaft guide wire lumen remains slidably disposed within the outer shaft guide wire lumen during relative movement of the outer shaft member to the inner shaft member.

12. A system for delivering a medical device within a body lumen comprising:

a tubular inner shaft member having a proximal end and a distal end and defining an inner shaft guide wire lumen extending at least partially therethrough;

a tubular outer shaft member having a proximal end and a distal end and defining an outer shaft guide wire lumen extending at least partially therethrough and opening exterior of the outer shaft member at a location proximal of the distal end of the outer shaft member, the outer shaft member slidably disposed about the inner shaft member;

a medical device disposed intermediate the inner and outer shaft members; and

an alignment mechanism maintaining rotational alignment and communication between the portions of the guide wire lumen extending at least partially through the inner shaft member and the outer shaft member.

13. The system of claim 12 wherein the alignment mechanism comprises:

a first length of the inner shaft guide wire lumen slidably coupled with a first length of the outer shaft guide wire lumen.

14. The system of claim 13 wherein the first length of the inner shaft guide wire lumen has an outer diameter less than an inner diameter of the first length of the outer shaft guide wire lumen and is slidably received within the outer shaft guide wire lumen.

16. The system of claim 12 wherein the alignment mechanism comprises:

a contact surface disposed about an inner circumference of the outer shaft member, said surface in contact with at least a portion of the medical device.

17. The system of claim 16 wherein the contact surface further comprises:

a plurality of axial ridges disposed along the inner circumference of the outer shaft member.

18. The system of claim 16 wherein the medical device comprises a tubular self-expanding stent having first and second ends.

19. The system of claim 18 wherein the first end of the self-expanding stent frictionally engages the contact surface on the inner circumference of the outer shaft member.

20. The system of claim 18 wherein the first end of the self-expanding stent is releaseably coupled to the inner shaft member.

21. A system for delivering an implant, the system comprising:

an inner member comprising an implant receiving portion, and a guidewire lumen extending through the inner member, and a guidewire lumen extension portion; and

an outer member comprising a port opening and a port opening extension portion coupled to the guidewire lumen extension portion, the outer member disposed about the inner member and sized to provide friction contact with an implant to be mounted on the inner member,

wherein the inner member is configured to be rotationally fixed with respect to the outer member as a function of a friction contact of an implant to be mounted on the inner member against the outer member.

22. The system of claim 21, wherein:

an alignment of the guidewire lumen extension portion and the port opening extension portion is configured to be also fixed as a function of a friction contact of an implant to be mounted on the inner member against the outer member.