Catch member for PFO occluder

• US 8,636,765 B2
• Filed: 04/05/2013
• Issued: 01/28/2014
• Est. Priority Date: 03/18/2005
• Status: Active Grant

• Current Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Original Assignee: WL Gore and Associates Incorporated (W.L. Gore and Associates)
• Inventors: Callaghan, David J., Glaser, Erik N.
• Primary Examiner(s): TYSON, MELANIE RUANO
• Application Number:
  US13/857,527
• Publication Number:
  US 20130226228A1
• Time in Patent Office: 298 Days
• Field of Search: 606151-158, 606/200, 606/213, 606/215, 623 2372- 2376
• US Class Current: 606/213
• CPC Class Codes: A61B 17/0057 Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect sutures A61B17/04; closing rectum or urethra near body surface A61F2/0009
• CPC Class Codes: A61B 17/12122 within the heart for closing a cardiac septal defect A61B17/0057
• CPC Class Codes: A61B 17/12145 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61B 17/50 Instruments, other than pincettes or toothpicks, for removing foreign bodies from the human body locating otherwise A61B5/06; locating by radiation A61B6/00; removing calculi A61B17/22; from the eyes A61F9/00709
• CPC Class Codes: A61B 2017/00575 for closure at remote site, e.g. closing atrial septum defects
• CPC Class Codes: A61B 2017/00592 Elastic or resilient implements
• CPC Class Codes: A61B 2017/00606 Implements H-shaped in cross-section, i.e. with occluders on both sides of the opening
• CPC Class Codes: A61B 2017/00619 Locking means for locking the implement in expanded state
• CPC Class Codes: A61B 2017/00623 Introducing or retrieving devices therefor
• CPC Class Codes: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014

Abstract

Delivery (and recovery) devices and techniques for delivering an implant into a desired location within the body and catch systems for such implants. The devices and techniques relate particularly to, but are not limited to, a patent foramen ovale (PFO) occluder made from a polymer tube. A catch system maintains an occluder in a deployed configuration by holding it in a reduced axial length position. Some embodiments have a compressible tip. Some embodiments have temporary catching mechanisms.

Claims

1. A collapsible medical device for occluding an aperture in a body, the medical device having a first configuration as a reduced profile and a second configuration as an expanded profile, the medical device being adapted to be delivered through a delivery system into a desired delivery location, the medical device comprising:

a bioresorbable occluder portion movable between the first and the second configuration, wherein the occluder portion comprises a proximal end, a distal end, and an axial passage between the proximal end and the distal end, the axial passage having a first inner diameter at the proximal end and a second inner diameter at the distal end;

a catch member adapted to be disposed in the axial passage of the occluder portion, wherein the catch member comprises a catch body having a proximal portion and a distal flange,

wherein the distal flange of the catch member engages the distal end of the occluder portion,

wherein the catch body has a tapered or graduated cylindrical profile composed of a distal section having a first diameter D₁ and a proximal section having a second diameter D₂ joined by a sloped section, wherein diameter D₂ is similar to the first inner diameter of the axial passage of the occluder portion; and

,

wherein the proximal portion of the catch body of the catch member further comprises two compressible prongs each comprising a proximal tip and a proximal ridge on a surface of the prong, wherein the proximal tip is adapted for connection to a delivery system; and

the proximal ridge is adapted to pass through the axial passage of the occluder portion while the compressible prongs are held in a compressed position and to engage the proximal end of the occluder portion thereby holding the medical device in the second configuration.

2. The collapsible medical device of claim 1, wherein the occluder portion is a bioresorbable polymer.

3. The collapsible medical device of claim 2, wherein the bioresorbable polymer is poly-4-hydroxy-butyrate (P4HB).

4. The collapsible medical device of claim 1, wherein the occluder portion is a bioresorbable metal.

5. The collapsible medical device of claim 1, wherein further the proximal collapsible tip is threaded.

6. A collapsible medical device for occluding an aperture in a body, the medical device having a first configuration as a reduced profile and a second configuration as an expanded profile, the medical device being adapted to be delivered through a delivery system into a desired delivery location, the medical device comprising:

a bioresorbable occluder portion movable between the first and the second configuration, wherein the occluder portion comprises a proximal end and proximal portion having a proximal axial passage therethrough with an inner diameter, a distal end and a distal portion having a distal axial passage therethrough with an inner diameter, and a central tube between the proximal end and the distal end; and

a catch member adapted to be disposed in the axial passages of the occluder portion, wherein the catch member comprises a catch body having an outer surface;

a proximal section comprising a proximal collapsible tip, a proximal ridge adjacent the proximal collapsible tip and a slot disposed at the proximal collapsible tip to render it collapsible; and

a distal section comprising a distal flange;

wherein the distal flange of the catch member engages the distal end of the occluder portion,

wherein the catch body has a tapered or graduated cylindrical profile composed of the distal section having a first outer diameter D₁ and the proximal section having a second outer diameter D₂ joined by a sloped section, wherein diameter D₂ is similar to the inner diameter of the proximal axial passage of the occluder portion; and

,

wherein the proximal collapsible tip is adapted for connection to a delivery system; and

the proximal ridge is adapted to pass through the proximal axial passage of the occluder portion while the proximal collapsible tip is held in a collapsed position to enable delivery and deployment of the occluder.

7. The collapsible medical device of claim 6, wherein the occluder portion is a bioresorbable polymer.

8. The collapsible medical device of claim 7, wherein the bioresorbable polymer is poly-4-hydroxy-butyrate (P4HB).

9. The collapsible medical device of claim 6, wherein the occluder portion is a bioresorbable metal.

10. The collapsible medical device of claim 6, wherein further the proximal collapsible tip is threaded.