Delivery Systems and Methods for PFO Closure Device with Two Anchors

Abstract

A device closes septal openings, such as a patent foramen ovale (PFO). The device includes two anchors and a flexible connector. Tension applied to one or more strings attached to the device causes the device to collapse into a reduced profile form for withdrawal into a delivery catheter, thereby facilitating retrieval of the device after insertion into a septal opening.

What is claimed is: 
     
         1 . A septal occluder comprising:
 a proximal anchor member for deployment proximate a first side of a septal defect, the proximal anchor having a substantially cylindrical shape cut out to form;   a flat axial face over a portion of the length at one end and a flat radial face and a radial passage extending along a diameter of the proximal anchor;   a distal anchor member for deployment proximate a second side of the septal defect;   a flexible connector connecting the proximal and distal anchor members; and   a first ball and a second ball disposed at opposite ends of the radial passage of the proximal anchor, the second ball being larger in diameter than the passage, wherein the first and second balls are connected to one another by a removal string for retrieving the device from its intended delivery location.   
     
     
         2 . The occluder of  claim 1 , wherein the balls are spherical. 
     
     
         3 . The occluder of  claim 2 , wherein the balls are coupled to a wire in conjunction with a holder that can push or pull them. 
     
     
         4 . The occluder of  claim 3 , wherein the holder is a grappling hook. 
     
     
         5 . The occluder of  claim 1 , wherein the balls are coupled to a hemispheric piece to serve as a stop. 
     
     
         6 . The occluder of  claim 1 , wherein a tension applied to the removal string causes the ball stop to pass through the radial passage, thereby causing the occluder to collapse into a form suitable for withdrawal into a delivery sheath.