Implant retrieval system

Abstract

Disclosed is an adjustable occlusion device for use in a body lumen such as the left atrial appendage. The occlusion device is removably carried by a deployment catheter. The device may be enlarged or reduced to facilitate optimal placement or removal. Methods are also disclosed.

1 . (canceled) 
     
     
         2 . An implantable occlusion device comprising:
 a proximal occluding member having a compressed configuration and a radially expanded configuration, the occluding member being biased to the radially expanded configuration;   a distal stabilizing member having a compressed configuration and a radially expanded configuration, the stabilizing member being biased to the radially expanded configuration;   a hinge element disposed between the proximal occluding member and the distal stabilizing member; and   a plurality of axially-extending struts disposed between the proximal occluding member and the distal stabilizing member;   wherein the occluding member includes a barrier disposed on a frame.   
     
     
         3 . The implantable occlusion device of  claim 2 , wherein the hinge element is disposed adjacent the proximal occluding member and the plurality of axially-extending struts is disposed between the hinge element and the distal stabilizing member. 
     
     
         4 . The implantable occlusion device of  claim 2 , wherein the distal stabilizing member includes a plurality of legs, wherein in the radially expanded configuration, the plurality of legs is inclined radially outwardly in a proximal direction. 
     
     
         5 . The implantable occlusion device of  claim 4 , wherein the plurality of legs each terminate at an atraumatic proximal end. 
     
     
         6 . The implantable occlusion device of  claim 4 , wherein the plurality of legs and the plurality of axially-extending struts are each formed from a single piece of tubular material. 
     
     
         7 . The implantable occlusion device of  claim 2 , wherein the hinge element is configured to orient a longitudinal axis of the occluding member at a non-coincident angle relative to a longitudinal axis of the stabilizing member. 
     
     
         8 . The implantable occlusion device of  claim 2 , wherein the hinge element includes a coil member. 
     
     
         9 . The implantable occlusion device of  claim 8 , wherein the coil member and the plurality of axially-extending struts are each formed from a single piece of tubular material. 
     
     
         10 . The implantable occlusion device of  claim 2 , wherein the barrier comprises a first layer of porous polymer material and a second layer of porous polymer material. 
     
     
         11 . The implantable occlusion device of  claim 10 , wherein the barrier comprises a third porous layer disposed between the first layer and the second layer. 
     
     
         12 . The implantable occlusion device of  claim 2 , wherein when the occluding member is in the radially expanded configuration, the occluding member has a diameter and a length, wherein the diameter is greater than the length. 
     
     
         13 . A method of manufacturing an implantable occlusion device, comprising:
 obtaining a single tubular member;   laser cutting the single tubular member to form a proximal expandable frame, a hinge element disposed distally of the frame, a plurality of axially-extending struts disposed distally of the hinge element, and a distal hub disposed at a distal end of the struts;   modifying the frame to include a self-bias towards a radially expanded orientation; and   attaching a barrier to the frame.   
     
     
         14 . The method of  claim 13 , further including laser cutting the single tubular member to form a plurality of legs extending proximally from the distal hub. 
     
     
         15 . The method of  claim 14 , wherein the plurality of legs is circumferentially interspersed between the plurality of axially-extending struts. 
     
     
         16 . The method of  claim 14 , further including modifying the plurality of legs to include a self-bias towards a radially expanded orientation in which the plurality of legs is inclined radially outwardly in a proximal direction. 
     
     
         17 . The method of  claim 14 , wherein the plurality of legs include different lengths. 
     
     
         18 . The method of  claim 13 , wherein the expandable frame includes a plurality of spokes and the barrier includes a first porous layer bonded to a second porous layer around the plurality of spokes. 
     
     
         19 . The method of  claim 18 , wherein the plurality of spokes each terminate at an end contained within the barrier. 
     
     
         20 . The method of  claim 18 , wherein the plurality of spokes each terminate at an end extending beyond the barrier.