System and method for mechanically positioning intravascular implants

• US 8,777,978 B2
• Filed: 08/30/2011
• Issued: 07/15/2014
• Est. Priority Date: 04/17/2006
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Strauss, Brian Michael, Slee, Earl Howard, Carrillo, Ramon Torres, Vu, Khoa Dang, Patterson, William Robert, Liang, Jessica, Bein, Richard Stephen, Hewitt, Todd Jeffrey, Faught, Stacy Leon, Divino, Vince, Drysen, Darrell Christopher, Ashby, Mark Philip, Klotz, Justin Arthur, Sanson, Maria De Jesus, Brennan, Scott William, Wilbur, Lawrason Charles, Oestreich, Lester Eugene
• Primary Examiner(s): Erezo, Darwin
• Assistant Examiner(s): HOLLM, JONATHAN A
• Application Number:
  US13/221,852
• Publication Number:
  US 20110313447A1
• Time in Patent Office: 1,050 Days
• Field of Search: 606/1, 606/108, 606/195, 606/200, 623/1.11, 128/831, 128/843
• 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 17/1214 Coils or wires
• CPC Class Codes: A61B 17/12145 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61B 17/12154 having stretch limiting means
• CPC Class Codes: A61B 17/12172 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• 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
• CPC Class Codes: A61B 2017/2913 cams or guiding means
• CPC Class Codes: A61B 2017/2924 Translation movement of handle without rotating movement
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers
• CPC Class Codes: A61F 2/01 Filters implantable into blood vessels
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2230/0006 circular

Abstract

An intravascular implant delivery system carries an implant by retaining an engagement member engaging the implant in a position proximal of an aperture at a distal end of the delivery system. The engagement member is retained proximal to the aperture by a cord that obstructs the movement of the engagement member through the aperture. The engagement member is free to rotate and move within an area defined by the delivery system, allowing the implant to react to forces imparted to the implant by the movement of the delivery system and implant through a delivery catheter. Once the implant is in a desired implant position, the cord is moved away from an aperture and the engagement member is allowed to move away from the delivery system.

Claims

1. An assembly for deploying an implant into an aneurysm in a vessel, comprising:

a distal region of a tubular member having a longitudinal axis, a circumferential wall defining only one lumen along the axis, the lumen having a lumen cross-sectional dimension, and the distal region having only one aperture from the lumen, the aperture being disposed in a distal portion and having an inner cross-sectional dimension less than the lumen cross-sectional dimension, and a distal end;

a coil implant having an enlarged proximal end disposed within the lumen of the distal region, wherein at least a portion of the coil implant extends through the aperture;

a core wire extending within the lumen and contacting (a) the circumferential wall and (b) the enlarged end at a point proximal to the distal portion; and

wherein a length of a line segment extending from an outer surface of the enlarged end, through the point, and to an outer surface of the core wire is greater than the inner cross-sectional dimension, such that the enlarged end is prevented from moving within the lumen distally entirely past the distal end when the core wire and enlarged end are positioned radially adjacent each other within the lumen; and

wherein, when the enlarged end is disposed within the lumen, the core wire extends distally beyond a distal end of the enlarged end to the tubular member distal portion.

2. The assembly of claim 1, wherein the core wire extends beyond a distalmost portion of the lumen.

3. The assembly of claim 1, wherein the coil implant further comprises a coil having a proximal portion and a distal portion.

4. The assembly of claim 3, wherein the coil implant further comprises a stretch-resistant member extending through the coil and having a proximal end and a distal end, the stretch-resistant member distal end coupled to the coil distal portion.

5. The assembly of claim 4, wherein the enlarged proximal end is disposed at the proximal end of the stretch-resistant member and is otherwise free of the proximal portion of the coil.

6. An assembly for deploying an implant into an aneurysm in a vessel, comprising:

a distal region of a tubular member having a longitudinal axis, a circumferential wall defining only one lumen along the axis, the lumen having a lumen cross-sectional dimension, and the distal region having only one aperture from the lumen, the aperture being disposed in a distal portion and having an inner cross-sectional dimension less than the lumen cross-sectional dimension, and a distal end;

a coil implant comprising;

(i) a coil;

(ii) an enlarged proximal end spaced apart from the coil and disposed within the lumen of the distal region, wherein at least a portion of the coil implant extends through the aperture;

a core wire extending within the lumen and contacting (a) the circumferential wall and (b) the enlarged end at a point, the core wire extending into the port; and

wherein a length of a line segment extending from an outer surface of the enlarged end, through the point, and to an outer surface of the core wire is greater than the inner cross-sectional dimension, such that the enlafrged end is prevented from moving within the lumen distally entirely past the distal end when the core wire and enlarged end are positioned radially adjacent each other within the lumen.

7. The assembly of claim 6, wherein the coil further comprises a proximal portion and a distal portion.

8. The assembly of claim 7, wherein the coil implant further comprises a stretch-resistant member extending through the coil and having a proximal end and a distal end, the stretch-resistant member distal end coupled to the coil distal portion.

9. The assembly of claim 8, wherein the enlarged proximal end is disposed at the proximal end of the stretch-resistant member and is otherwise free of the proximal portion of the coil.

10. The assembly of claim 6, wherein, when the core wire and enlarged proximal end are positioned radially adjacent each other relative to the axis, the enlarged proximal end abuts the wall.

11. The assembly of claim 6, wherein, at the distal portion, the wall comprises at least one section extending at least partially through the wall.

12. The assembly of claim 11, wherein, the at least one section is selected from the group consisting of a skived section, a slot, a gap, a hole, a spiral cut, and a reduced thickness in the tubular wall.

13. An assembly for deploying an implant into an aneurysm in a vessel, comprising:

a distal region of a tubular member having a longitudinal axis, a wall defining only one lumen along the axis, and the distal region having only one aperture from the lumen, the aperture being disposed in a distal portion and having an inner cross-sectional dimension and a distal end;

a coil implant comprising;

(i) a coil disposed entirely outside the lumen;

(ii) an enlarged proximal end disposed within the lumen of the distal region, wherein at least a portion of the coil implant extends through the aperture;

a core wire extending within the lumen and contacting (a) the circumferential wall and (b) the enlarged end at a point proximal to the distal portion; and

wherein a length of a line segment extending from an outer surface of the enlarged end, through the point, and to an outer surface of the core wire is greater than the inner cross-sectional dimension, such that the enlarged end is prevented from moving within the lumen distally entirely past the distal end when the core wire and enlarged end are positioned radially adjacent each other within the lumen;

wherein the lumen has a lumen cross-sectional dimension and the tubular member comprises a reduced portion proximal to the enlarged proximal end, having an opening receiving a portion of the core wire, the opening having a reduced cross-sectional dimension less than the lumen cross-sectional dimension.

14. The assembly of claim 13, wherein the coil further comprises a proximal portion and a distal portion.

15. The assembly of claim 14, wherein the coil implant further comprises a stretch-resistant member extending through the coil and having a proximal end and a distal end, the stretch-resistant member distal end coupled to the coil distal portion.

16. The assembly of claim 15, wherein the enlarged proximal end is disposed at the proximal end of the stretch-resistant member and is otherwise free of the proximal portion of the coil.

17. The assembly of claim 13, wherein, when the core wire and enlarged proximal end are positioned radially adjacent each other relative to the axis, the enlarged proximal end abuts the wall.

18. The assembly of claim 13, wherein, at the distal portion, the wall comprises at least one section extending at least partially through the wall.

19. The assembly of claim 18, wherein, the at least one section is selected from the group consisting of a skived section, a slot, a gap, a hole, a spiral cut, and a reduced thickness in the tubular wall.

20. An assembly for deploying an implant into an aneurysm in a vessel, comprising:

a distal region of a tubular member having a longitudinal axis, a wall defining only one lumen along the axis, and the distal region having only one aperture from the lumen, the aperture being disposed in a distal portion and having an inner cross-sectional dimension and a distal end;

a coil implant comprising;

(i) a coil having a proximal portion and a distal portion;

(ii) a stretch-resistant member extending through the coil and having a proximal end and a distal end, the stretch-resistant member distal end coupled to the coil distal portion;

(iii) an enlarged proximal end disposed at the proximal end of the stretch-resistant member and otherwise free of the proximal portion of the coil and disposed within the lumen of the distal region, wherein at least a portion of the coil implant extends through the aperture;

a core wire extending within the lumen and contacting (a) the circumferential wall and (b) the enlarged end at a point; and

wherein a length of a line segment extending from an outer surface of the enlarged end, through the point, and to an outer surface of the core wire is greater than the inner cross-sectional dimension, such that the enlarged end is prevented from moving within the lumen distally entirely past the tubular member distal end when the core wire and enlarged end are positioned radially adjacent each other within the lumen;

wherein the lumen has a lumen cross-sectional dimension and the tubular member comprises a reduced portion proximal to the enlarged proximal end, having an opening receiving a portion of the core wire, the opening having a reduced cross-sectional dimension less than the lumen cross-sectional dimension.

21. The assembly of claim 20, wherein, when the core wire and enlarged end are positioned radially adjacent each other relative to the axis, the enlarged proximal end abuts the wall.

22. The assembly of claim 20, wherein, at the distal portion, the wall comprises at least one section extending at least partially through the wall.

23. The assembly of claim 22, wherein, the at least one section is selected from the group consisting of a skived section, a slot, a gap, a hole, a spiral cut, and a reduced thickness in the tubular wall.