Stretch resistant embolic coil delivery system with mechanical release mechanism

• US 7,371,251 B2
• Filed: 06/02/2005
• Issued: 05/13/2008
• Est. Priority Date: 06/02/2005
• Status: Active Grant

• Current Assignee: Codman & Shurtleff Incorporated (Johnson & Johnson)
• Original Assignee: Cordis Neurovascular, Inc. (Johnson & Johnson)
• Inventors: Mitelberg, Vladimir, Jones, Donald K., Lorenzo, Juan A.
• Primary Examiner(s): Ho; (Jackie) Tan-Uyen
• Assistant Examiner(s): RYCKMAN, MELISSA K
• Application Number:
  US11/143,052
• Publication Number:
  US 20060276824A1
• Time in Patent Office: 1,076 Days
• Field of Search: 606/142, 606/151, 606/191, 606/200, 606/213, 623/1.1, 623/1.11
• 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 17/12154 having stretch limiting means
• CPC Class Codes: A61B 2017/1205 Introduction devices
• CPC Class Codes: A61B 2017/12054 Details concerning the detachment of the occluding device from the introduction device

Abstract

A medical device for placing an embolic device at a predetermined site within a vessel of the body including a delivery catheter and a flexible pusher member having a lumen therethrough and being slidably disposed within the lumen of the catheter. A stretch resistant embolic device is retained within the delivery catheter by a mechanical interlocking mechanism which includes an engagement member which is attached to the distal end of the pusher member and extends through a retaining ring at the proximal end of the embolic device. A detachment member extends through an aperture at the distal end of the engagement member thereby locking the embolic device onto the pusher member. The engagement member engages a retaining ring on the embolic device. When the embolic device is advanced to the predetermined site within the vessel, the detachment member is withdrawn from the aperture to thereby release the embolic device at the treatment site.

Claims

1. A vasooclusive embolic device deployment system for use in placing an embolic device at a predetermined site within a vessel comprising:

an elongated flexible deployment catheter having a lumen extending therethrough and having proximal and distal ends;

an elongated pusher member having a lumen extending therethrough and having proximal and distal ends and being slidably disposed within the lumen of the deployment catheter;

an embolic device which takes the form of an embolic coil defining a central lumen extending between proximal and distal sections of the coil, a stretch resistant member having first and second ends, said first end of the stretch resistant member is attached to the distal section of the coil and the second end of the stretch resistant member is attached to a retaining ring;

an engagement member fixedly attached to the distal end of the pusher member and having an aperture extending through the distal end thereof, said engagement member extending through said retaining ring; and

,

an elongated detachment member extending from a position proximal of the proximal end of the pusher member, through the lumen of the pusher member and through the aperture of the engagement member such that when the detachment member is pulled proximally the distal end of the detachment member is withdrawn from the aperture of the engagement member to thereby release the embolic device.

2. A vasooclusive embolic device deployment system as defined in claim 1, wherein said stretch resistant member is formed of a wire.

3. A vasooclusive embolic device deployment system as defined in claim 1, wherein said stretch resistant member is formed of a fiber.

4. A vasooclusive embolic device deployment system as defined in claim 1, wherein said stretch resistant member is formed of a polymer.

5. A vasooclusive embolic device deployment system as defined in claim 1, wherein said engagement member is of an L-shaped configuration so as to form first and second legs, said first leg being attached to said pusher member and said second leg extending through said retaining ring.

6. A vasooclusive embolic device deployment system as defined in claim 5, wherein said aperture extends through a distal end of said second leg such that when said detachment member extends through said aperture said retaining ring of said embolic device is interlocked onto said engagement member until the detachment member is withdrawn from said aperture.

7. A vasooclusive embolic device deployment system as defined in claim 6, wherein said stretch resistant member is formed of a wire.

8. A vasooclusive embolic device deployment system as defined in claim 6, wherein said stretch resistant member is formed of a fiber.

9. A vasooclusive embolic device deployment system as defined in claim 1, wherein the first end of said stretch-resistant member is attached to the distal end of the embolic coil.

10. A vasooclusive embolic device deployment system for use in placing an embolic device at a predetermined site within a vessel comprising:

an elongated flexible deployment catheter having a lumen extending therethrough and having proximal and distal ends;

an elongated pusher member having proximal and distal ends and being slidably disposed within the lumen of the deployment catheter;

an embolic device which takes the form of an embolic coil defining a central lumen extending between proximal and distal sections of the coil, a stretch resistant member having first and second ends, said first end of the stretch resistant member is attached to the distal section of the coil and the second end of the stretch resistant member is attached to a retaining ring;

an engagement member fixedly attached to the distal end of the pusher member and having an aperture extending through the distal end thereof;

said engagement member extending through said retaining ring of the embolic device; and

,

an elongated detachment member extending from a position proximal of the deployment catheter, through the lumen of the catheter and through the aperture of the engagement member such that when the detachment member is pulled proximally the distal end of the detachment member is withdrawn from the aperture of the engagement member to thereby release the embolic device.

11. A vasooclusive embolic device deployment system as defined in claim 10, wherein said engagement member is of an L-shaped configuration so as to form first and second legs, said first leg being attached to said pusher member and said second leg extending through said retaining ring.

12. A vasooclusive embolic device deployment system as defined in claim 11, wherein said aperture extends through the distal end of said second leg such that when said detachment member extends through said aperture said retaining ring of said embolic device is interlocked onto said engagement member until the detachment member is withdrawn from said aperture.

13. A vasooclusive embolic device deployment system as defined in claim 12, wherein a central axis of said aperture extends substantially at a right angle to a central axis of said retaining ring.

14. A vasooclusive embolic device deployment system as defined in claim 13, wherein said embolic device takes the form of an embolic coil comprised of multiple turns.

15. A vasooclusive embolic device deployment system as defined in claim 14, wherein said embolic device takes the form of a helically wound embolic coil.

16. A vasooclusive embolic device deployment system as defined in claim 15, wherein said central axis of said retaining ring extends substantially at a right angle to a central axis of said helically wound embolic coil.

17. A vasooclusive embolic device deployment system as defined in claim 16, wherein said helically wound embolic coil is comprised of a plurality of turns of which one of said plurality of turns has a central axis which extends substantially at a right angle to a central axis of the other turns and forms the retaining ring.

18. A vasooclusive embolic device deployment system as defined in claim 10, including a retaining clamp having a lumen extending therethrough and being mounted on the proximal end of the pusher member, and wherein said detachment member extends from a position proximal of said clamp and through the lumen of the clamp so that said detachment member may be clamped into a fixed position prior to the release of the clamp and withdrawal of the detachment member from the aperture of the engagement member.

19. A vasooclusive embolic device deployment system for use in placing an embolic device at a predetermined site within a vessel comprising:

an elongated flexible deployment catheter having a lumen extending therethrough and having proximal and distal ends;

an elongated pusher member having a lumen extending therethrough and having proximal and distal ends and being slidably disposed within the lumen of the deployment catheter;

an embolic device which takes the form of an embolic coil, a stretch resistant member having first and second ends, said first end of the stretch resistant member is attached to the distal section of the coil and the second end of the stretch-resistant member is attached to the proximal section of the coil, and the proximal end of said embolic coil is attached to a retaining ring;

an engagement member fixedly attached to the distal end of the pusher member and having an aperture extending through the distal end thereof, said engagement member extending through said retaining ring; and

,

an elongated detachment member extending from a position proximal of the proximal end of the pusher member, through the lumen of the pusher member and through the aperture of the engagement member such that when the detachment member is pulled proximally the distal end of the detachment member is withdrawn from the aperture of the engagement member to thereby release the embolic device.

20. A vasooclusive embolic device deployment system as defined in claim 19, wherein said embolic device takes the form of an embolic coil.

21. A vasooclusive embolic device deployment system as defined in claim 20, wherein said embolic device takes the form of a helically wound embolic coil.

22. A vasooclusive embolic device deployment system as defined in claim 19, wherein said stretch resistant member is formed of a wire.

23. A vasooclusive embolic device deployment system as defined in claim 19, wherein said stretch resistant member is formed of a fiber.

24. A vasooclusive embolic device deployment system as defined in claim 19, wherein said stretch resistant member is formed of a polymer.

25. A vasooclusive embolic device deployment system as defined in claim 19, wherein said engagement member is of an L-shaped configuration so as to form first and second legs, said first leg being attached to said pusher member and said second leg extending through said retaining ring.

26. A vasooclusive embolic device deployment system as defined in claim 25, wherein said aperture extends through the distal end of said second leg such that when said detachment member extends through said aperture said retaining ring of said embolic device is interlocked onto said engagement member until the detachment member is withdrawn from said aperture.

27. A vasooclusive embolic device deployment system as defined in claim 26, wherein said stretch resistant member is formed of a wire.

28. A vasooclusive embolic device deployment system as defined in claim 26, wherein said stretch resistant member is formed of a fiber.

29. A vasooclusive embolic device deployment system as defined in claim 19, wherein the first end of said stretch-resistant member is attached to the distal end of the embolic coil.

30. A vasooclusive embolic device deployment system for use in placing an embolic device at a predetermined site within a vessel comprising:

an elongated flexible deployment catheter having a lumen extending therethrough and having proximal and distal ends;

an elongated pusher member having proximal and distal ends and being slidably disposed within the lumen of the deployment catheter;

an embolic device which takes the form of an embolic coil defining a central lumen extending between the proximal and distal sections of the coil, a stretch resistant member having first and second ends, said first end of the stretch resistant member is attached to the distal section of the coil and the second end of the stretch resistant member is attached to a retaining ring;

an engagement member fixedly attached to the distal end of the pusher member and having an aperture extending through the distal end thereof;

said engagement member extending through said retaining ring of the embolic device; and

,

an elongated detachment member extending from a position proximal of the deployment catheter, through the lumen of the catheter and through the aperture of the engagement member such that when the detachment member is pulled proximally the distal end of the detachment member is withdrawn from the aperture of the engagement member to thereby release the embolic device.

31. A vasooclusive embolic device deployment system as defined in claim 30, wherein said engagement member is of an L-shaped configuration so as to form first and second legs, said first leg being attached to said pusher member and said second leg extending through said retaining ring.

32. A vasooclusive embolic device deployment system as defined in claim 31, wherein said aperture extends through the distal end of said second leg such that when said detachment member extends through said aperture said retaining ring of said embolic device is interlocked onto said engagement member until the detachment member is withdrawn from said aperture.

33. A vasooclusive embolic device deployment system as defined in claim 32, wherein a central axis of said aperture extends substantially at a right angle to a central axis of said retaining ring.

34. A vasooclusive embolic device deployment system as defined in claim 33, wherein said embolic device takes the form of an embolic coil.

35. A vasooclusive embolic device deployment system as defined in claim 34, wherein said embolic device takes the form of a helically wound embolic coil.

36. A vasooclusive embolic device deployment system as defined in claim 35, wherein said central axis of said retaining ring extends substantially at a right angle to a central axis of said helically wound embolic coil.

37. A vasooclusive embolic device deployment system as defined in claim 36, wherein said helically wound embolic coil is comprised of a plurality of turns of which one of said plurality of turns has a central axis which extends substantially at a right angle to a central axis of the other turns and forms the retaining ring.

38. A vasooclusive embolic device deployment system as defined in claim 30, including a retaining clamp having a lumen extending therethrough and being mounted on the proximal end of the pusher member, and wherein said detachment member extends from a position proximal of said clamp and through the lumen of the clamp so that said detachment member may be clamped into a fixed position prior to the release of the clamp and withdrawal of the detachment member from the aperture of the engagement member.