Implant delivery and detachment system and method

• US 20050149108A1
• Filed: 12/17/2003
• Published: 07/07/2005
• Est. Priority Date: 12/17/2003
• Status: Abandoned Application

• Current Assignee: Microvention Incorporated (Terumo Corporation)
• Original Assignee: Microvention Incorporated (Terumo Corporation)
• Inventors: Cox, Brian J.
• Application Number:
  US10/739,646
• Publication Number:
  US 20050149108A1
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/12113 within an aneurysm
• CPC Class Codes: A61B 17/12145 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61B 17/12168 having a mesh structure A61B17/1214 takes precedence
• CPC Class Codes: A61B 17/1219 expandable in contact with liquids
• CPC Class Codes: A61B 2017/12068 detachable by heat
• CPC Class Codes: A61B 2017/12077 Joint changing shape upon application of heat, e.g. bi-metal or reversible thermal memory

Abstract

The present invention provides for implant device delivery apparatuses and related methods of use. An apparatus of the present invention may include a pusher member selectively engaged to an implant device. The implant device may be, e.g., a coil. A coupling section of the apparatus allows the implant device to be secured to the pusher member via an application of energy. When it is desired to disengage the implant device, such as after locating the implant device at a target cavity site, the application of energy is ceased and the implant device may be disengaged from the pusher member.

Claims

1. An implant device delivery and release apparatus comprising:

an implant device;

a pusher member having a proximal end and a distal end; and

a coupling section configured to attach the implant device to the distal end of the pusher member, the coupling section comprising

a thermally responsive member, and

a coupler adopted to receive the thermally responsive member,

wherein the thermally responsive member is held by the coupler by an application of energy and is released from the coupler by discontinuing the application of energy.

2. The apparatus of claim 1, wherein the coupling section further comprises a resistive heating element in communication with the thermally responsive member.

3. The apparatus of claim 1, wherein the pusher member further comprises a lumen, and the apparatus further comprises a resistive heating element disposed within the lumen of the pusher member and in communication with the thermally responsive member.

4. The apparatus of claim 1, wherein the coupling section further comprises a spring member disposed on distal end of the pusher member, the spring member being configured to forcibly release the thermally responsive member from the coupler after discontinuing the application of energy.

5. The apparatus of claim 1, wherein the coupler is in operable connection with the implant device, and the thermally responsive member is in operable connection with the pusher member.

6. The apparatus of claim 1, wherein the implant device comprises a hydrophilic element.

7. The apparatus of claim 1, wherein the implant device comprises a coil.

8. The apparatus of claim 1, wherein the thermally responsive member is released from the coupler upon cooling to body temperature.

9. A method for delivering an implant device using a pusher member having a proximal end and a distal end, the method comprising:

affixing the implant device to the distal end of the pusher member by applying energy to the pusher member;

introducing the implant device into a body having a target cavity;

advancing the implant device to the target cavity; and

detaching the implant device from the distal end of the pusher member by discontinuing the application of energy to the pusher member.

10. The method of claim 9, wherein affixing the implant device to the pusher member is performed prior to introducing the implant device into the body.

11. The method of claim 9, wherein affixing the implant device is performed using electrical energy.

12. The method of claim 9, wherein the implant device is a coil having a proximal end and a distal end, and affixing the implant device comprises coupling the proximal end of the coil to the distal end of the pusher member prior to applying energy to the pusher member.

13. The method of claim 9, further comprising removing the pusher member from the body after detaching the implant device from the pusher member.

14. An implant device delivery and release apparatus comprising:

an implant device;

a pusher member having a proximal end and a distal end; and

a coupling section configured to couple the implant device to the distal end of the pusher member, the coupling section comprising

a thermally responsive member,

a retaining sleeve surrounding the thermally responsive member, and

a tether detachably engaged between the thermally responsive member and the retaining element,

wherein the implant device is coupled to the pusher member by an application of energy to the coupling section and is released from the pusher member by discontinuing the application of energy.

15. The apparatus of claim 14, wherein the thermally responsive member has a first configuration in which the thermally responsive member engages the tether, and a second configuration in which the thermally responsive member disengages the tether.

16. The apparatus of claim 15, wherein the thermally responsive member is placed in the first configuration by an application of energy to the coupling section.

17. The apparatus of claim 14, wherein the coupling section further comprises a resistive heating element in communication with the thermally responsive member.

18. The apparatus of claim 14, wherein the tether is permanently attached to the implant device.

19. The apparatus of claim 14, wherein the tether comprises a first end and a second end, the first end being permanently engaged between the retaining sleeve and the thermally responsive member, and the second end being releasably engaged between the retaining sleeve and the thermally responsive member.

20. The apparatus of claim 19, wherein the second end of the tether is released from between the retaining sleeve and the thermally responsive member by discontinuing the application of energy.

21. The apparatus of claim 19, wherein the coupling section further comprises an attachment point to which the tether is detachably engaged, the tether being engaged to the attachment point by the application of energy and released from the attachment point by discontinuing the application of energy.

22. The apparatus of claim 21, wherein the implant device comprises a proximal end and a distal end, and the attachment point is disposed on the proximal end of the implant device.

23. The apparatus of claim 14, wherein the implant device comprises a coil.

24. The apparatus of claim 14, wherein the implant device comprises a coil and a hydrophilic element.