Implant delivery device

• US 9,561,125 B2
• Filed: 04/06/2011
• Issued: 02/07/2017
• Est. Priority Date: 04/14/2010
• Status: Active Grant

• Current Assignee: Microvention Incorporated (Terumo Corporation)
• Original Assignee: Microvention Incorporated (Terumo Corporation)
• Inventors: Bowman, Heath, Le, Jake, Fitz, Matthew
• Primary Examiner(s): YABUT, DIANE D
• Application Number:
  US13/081,275
• Publication Number:
  US 20110301686A1
• Time in Patent Office: 2,134 Days
• Field of Search: 606/200
• US Class Current: 1/1
• CPC Class Codes: A61B 17/12027 Type of occlusion A61B17/12113 takes precedence
• CPC Class Codes: A61B 17/12099 characterised by the location of the occluder
• CPC Class Codes: A61B 17/12113 within an aneurysm
• CPC Class Codes: A61B 17/12122 within the heart for closing a cardiac septal defect A61B17/0057
• CPC Class Codes: A61B 17/1214 Coils or wires
• CPC Class Codes: A61B 17/12154 having stretch limiting means
• CPC Class Codes: A61B 2017/00119 alarm; indicating an abnormal situation
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/00734 battery operated
• CPC Class Codes: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61B 2017/12054 Details concerning the detachment of the occluding device from the introduction device
• CPC Class Codes: A61B 2017/12068 detachable by heat
• CPC Class Codes: A61B 2017/12072 the heat created by laser light
• CPC Class Codes: A61B 2017/12077 Joint changing shape upon application of heat, e.g. bi-metal or reversible thermal memory
• CPC Class Codes: A61B 2017/1209 detachable by electrical current or potential, e.g. electroactive polymer
• CPC Class Codes: A61B 2017/4233 Operations on Fallopian tubes, e.g. sterilization A61B2017/1125 takes precedence
• CPC Class Codes: A61B 2090/3966 Radiopaque markers visible in an X-ray image
• 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
• CPC Class Codes: A61M 2025/0042 Microcatheters, cannula or the like having outside diameters around 1 mm or less
• CPC Class Codes: A61M 25/0021 : characterised by the form of the tubing A61M25/0054 takes precedence

Abstract

A system for delivering an implant within a patient is described. The activation of the heater coil causes the degradation, melting or reduction of a component that brings the heater coil into or out of electrical contact with another component, or causes the individual loops of the coil to contact each other, thereby resulting a notable change in resistance in the circuit supplying the heater coil with electricity. A core wire terminates prior to the distal end of the device, allowing for greater flexibility.

Claims

1. A delivery device comprising:

an elongated tubular member;

an implant retention mechanism located within said tubular member and releasably securing an implant at a distal end of said tubular member;

a core wire for strengthening said elongated tubular member;

said core wire at least partially located within said tubular member;

said core wire having a distal end terminating between about 2 cm and about 4 cm from said distal end of said tubular member;

a support coil located between a proximal end of a heater coil and a distal end of said core wire;

a non-insulated wire electrically connected to said core wire at a first and second location, and further connected to said heater coil.

2. The delivery device of claim 1, wherein said distal end of said core wire terminates at about 3 cm from said distal end of said tubular member.

3. The delivery device of claim 1, further comprising an electrical connector located at a proximal end of said device and said heater coil located within said distal end of said tubular member.

4. The delivery device of claim 3, wherein said heater coil is spaced apart from said core wire.

5. The delivery device of claim 1, further comprising an insulated wire connected to said electrical connector and said heater coil.

6. The delivery device of claim 1, wherein said non-insulated wire is electrically connected near a proximal end of said core wire and near a distal end of said core wire.

7. The delivery device of claim 1, wherein said support coil further comprises a first coil region having a first coil density and a second coil region having a second coil density, said second coil density being less than said first coil density.

8. A delivery device comprising:

an elongated tubular member;

an implant releasably connected to a distal end of said delivery device;

a heater coil located at said distal end of said delivery device;

a core wire at least partially fixed within said tubular member for providing support;

said core wire having a distal end terminating between about 2 cm and 4 cm from said distal end of said delivery device; and

,

a support coil located between said distal end of said core wire and a proximal end of said heater coil;

a bare wire connected to and in electrical communication with said core wire at both a first location and at a second location;

said bare wire further connected to and in electrical communication with said heater coil.

9. The delivery device of claim 8, wherein said support coil further comprises a densely-coiled region a spread-apart coil region.

10. The delivery device of claim 9, further comprising an insulated wire in electrical communication with a heater coil at a distal end of said delivery device.

11. The delivery device of claim 10, wherein said bare wire comprises about 99.99% silver and has a diameter of about 0.002 inches.

12. The delivery device of claim 10, wherein said insulated wire is in electrical communication with a conductive band located near a proximal end of said delivery device.

13. A delivery device comprising:

an implant retention mechanism located near a distal end of said delivery device for selectively releasing an implant;

a core wire at least partially located within an elongated tubular member of said delivery device for providing resistance to bending;

said core wire having a distal end terminating between about 2 cm and 4 cm from said distal end of said delivery device; and

,

a support coil connected to a distal end of said core wire and extending to said distal end of said distal end of said delivery device;

an insulated wire and a bare wire arranged to selectively supply electricity to a heater coil of said implant retention mechanism;

wherein said bare wire is electrically connected to said core wire at a first and second location.

14. The delivery device of claim 13, further comprising a tether fixed to said core wire and positioned through said heater coil to retain an implant.

15. The delivery device of claim 13, wherein said distal end of said core wire terminates at about 3 cm from said distal end of said delivery device.

16. A delivery device comprising:

an elongated tubular member;

an implant retention mechanism located within said tubular member and releasably securing an implant at a distal end of said tubular member;

a core wire for strengthening said elongated tubular member;

said core wire at least partially located within said tubular member;

said core wire having a distal end terminating between about 2 cm and about 4 cm from said distal end of said tubular member;

a non-insulated wire electrically connected to said core wire at a first and second location, and further connected to a heater coil.