Septal defect closure device

Abstract

A device for closing a septal defect of a patient comprising a covering member and at least one retaining leg. The covering member has a first configuration for delivery and a second configuration for placement on the first side of the defect. The at least one retaining leg is configured to contact tissue on the second side of the defect to retain the covering member and has a first configuration for delivery and a second configuration for placement on the second side of the defect.

What is claimed is: 
     
         1 - 12 . (canceled) 
     
     
         13 . A method of closing a septal defect comprising:
 providing a covering member for delivery to a distal side of the septal defect, the covering member having a dimension at least equal to a size of the defect to cover the defect;   delivering the covering member in a collapsed position to the distal side of the septal defect, the covering member moving to a an expanded placement configuration to cover the distal side of the defect; and   delivering at least one retaining member in an elongated position to a proximal side of the defect, the retaining member moving to a placement position to engage tissue on the proximal side of the defect to retain the covering member on the distal side of the defect.   
     
     
         14 . The method of  claim 13 , wherein the step of delivering the covering member occurs prior to movement of the covering member to the expanded placement configuration. 
     
     
         15 . The method of  claim 13 , wherein the covering member has an expandable wire positioned therein composed of shape memory material so that upon delivery the wire expands to expand the covering member to the placement configuration. 
     
     
         16 . The method of  claim 15 , wherein the wire is delivered to the covering member is situ. 
     
     
         17 . The method of  claim 13 , wherein the at least one retaining member is composed of shape memory material so that upon delivery the retaining member automatically moves to a curved placement position. 
     
     
         18 . The method of  claim 15 , wherein the wire is substantially ring-shaped in a shape memorized position. 
     
     
         19 . The method of  claim 13 , wherein the at least one retaining member includes two curved legs, and wherein movement to the placement position enables the legs to curve toward the covering member. 
     
     
         20 . The method of  claim 16 , wherein the wire is delivered in an elongated configuration. 
     
     
         21 . The method of  claim 20 , wherein the wire moves to a substantially ring-shaped shape memorized position when delivered to the covering member. 
     
     
         22 . The method of  claim 13 , wherein the at least one retaining member is composed of a different material than the covering member. 
     
     
         23 . The method of  claim 19 , wherein the legs have free ends and when released from a delivery member to move to a placement position, the free ends curve toward the covering member. 
     
     
         24 . The method of  claim 13 , wherein a first pusher advances the covering member to the placement configuration. 
     
     
         25 . The method of  claim 24 , further comprising the step of releasing the first pusher from attachment to the covering member. 
     
     
         26 . The method of  claim 24 , further comprising the step advancing a wire into the covering member by advancing a second pusher through a lumen in the first pusher. 
     
     
         27 . The method of  claim 26 , wherein the at least one retaining member is released from a delivery member to move to the placement position after the step of advancing the wire into the covering member.