Coil shaft

• US 9,084,694 B2
• Filed: 09/09/2005
• Issued: 07/21/2015
• Est. Priority Date: 09/09/2005
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Goodin, Richard, Gunderson, Richard C., Moberg, John R., Prindle, Katherine, Blix, John, Burgmeier, Robert
• Primary Examiner(s): Houston, Elizabeth
• Assistant Examiner(s): David, Shaun L
• Application Number:
  US11/223,370
• Publication Number:
  US 20070060996A1
• Time in Patent Office: 3,602 Days
• Field of Search: 623/1.22, 623/1.23, 623/1.11, 623/1.12, 623 13- 131, 604/103.09, 604/526, 606/157, 606/200, 606/108
• US Class Current: 1/1
• 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: A61M 25/005 with embedded materials for reinforcement, e.g. wires, coils, braids

Abstract

Systems for delivering medical devices, as well as related methods are described.

Claims

1. An implantable medical endoprosthesis delivery system, comprising:

an outer member; and

an inner tubular member disposed within the outer member, the inner tubular member defining a guidewire lumen and having a distal tip with a distal opening in fluid communication with the guidewire lumen, the inner tubular member comprising a coil having a proximal coil portion and a distal coil portion, the distal coil portion including windings having a spacing therebetween that differs from a spacing, if any, between windings of the proximal coil portion,

wherein;

the spacing between the windings of the distal coil portion is greater than the spacing, if any, between windings of the proximal coil portion;

at least some of the windings of the distal coil portion surround the guidewire lumen of the system;

the windings of the distal coil portion have an outer diameter that is smaller than an outer diameter of the windings of the proximal coil portion; and

an implantable medical endoprosthesis is disposed radially between the outer member and the windings of the distal coil portion.

2. The implantable medical endoprosthesis delivery system of claim 1, wherein an average distance between adjacent windings of the distal coil portion is at least about 20% of an average width of the windings of the distal coil portion.

3. The implantable medical endoprosthesis delivery system of claim 2, wherein the average distance between adjacent windings of the distal coil portion is at least about 30% of the average width of the windings of the distal coil portion.

4. The implantable medical endoprosthesis delivery system of claim 1, wherein the proximal coil is defined by a plurality of windings and an average distance between adjacent windings of the distal coil is at least about 2 times greater than an average distance between adjacent windings of the proximal coil.

5. The implantable medical endoprosthesis delivery system of claim 4, wherein the average distance between adjacent windings of the distal coil is at least about 10 times greater than the average distance between adjacent windings of the proximal coil.

6. The implantable medical endoprosthesis delivery system of claim 1, further comprising a polymeric coating that contacts an outer surface of the coil.

7. The implantable medical endoprosthesis delivery system of claim 6, further comprising a tube at least partially surrounded by the coil, wherein the polymeric coating secures at least some of the windings of the distal coil portion with respect to the tube.

8. The implantable medical endoprosthesis delivery system of claim 6, wherein the polymeric coating is formed from a material having a durometer of about 50 D or less.

9. An implantable medical endoprosthesis delivery system, comprising:

an outer member; and

an inner member disposed within the outer member, the inner member comprising a coil having a proximal coil portion and a distal coil portion, the distal coil portion including a plurality of windings spaced apart a distance different than a distance, if any, spacing apart windings of the proximal coil portion,

wherein;

wherein the spacing between the windings of the distal coil portion is greater than the spacing, if any, between winding of the proximal coil portion;

the windings of the distal coil portion have an outer diameter that is smaller than an outer diameter of the windings of the proximal coil portion;

at least some of the windings of the distal coil portion surround a tube at least partially defining a guidewire lumen of the system; and

an implantable medical endoprosthesis is disposed radially between the outer member and the windings of the distal coil portion.