Methods and systems for endovascularly clipping and repairing lumen and tissue defects

Abstract

An implantable closure structure is delivered using minimally invasive techniques and inhibits the migration of liquid and particulate matter from inside a physiological cavity or opening, such as an aneurysm or a septal defect, as well as inhibiting the flow of liquid and particulate matter, such as from an associated blood vessel or chamber, into the physiological cavity or opening. The device has a closure structure that covers the neck or opening of a cavity and has one or more anchoring structures for supporting and retaining the closure structure in place across the cavity or opening.

What is claimed is: 
     
         1 . An implantable device for repairing an opening in a target tissue defect, the implantable device being adjustable from a delivery condition comprising a generally small diameter configuration to a deployed condition comprising a larger diameter configuration, the implantable device comprising:
 a closure structure sized to substantially cover the opening or cavity when the device is in the deployed condition; and   first and second sets of anchoring structures projecting from opposite sides of an intermediate collar structure and generally transverse with the closure structure, wherein both sets of anchoring structures bend radially outwardly during the deployed condition to form a substantially circumferential, ring-like structure;   wherein the first and second sets of anchoring structures are substantially atraumatic and constructed to minimize trauma to the target tissue defect contacted in the deployed condition.   
     
     
         2 . The implantable device of  claim 1 , wherein the first and second sets of anchoring structures comprise a generally flattened structure and cross-sectional configuration. 
     
     
         3 . The implantable device of  claim 1 , wherein the first and second sets of anchoring structures comprise substantially the same configuration. 
     
     
         4 . The implantable device of  claim 1 , wherein the first and second sets of anchoring structures comprise a shape change material and form a substantially cylindrical structure in the deployed condition. 
     
     
         5 . The implantable device of  claim 1 , further comprising:
 one or more radiopaque markers proximate ends of the anchoring structures and remote from intermediate collar structure,   wherein the one or more radiopaque markers correspond to distal and proximal ends of the implantable device in the deployed condition.   
     
     
         6 . The implantable device of  claim 1 , wherein the implantable is radically symmetrical. 
     
     
         7 . The implantable device of  claim 1 , wherein the implantable is radically asymmetrical. 
     
     
         8 . The implantable device of  claim 1 , further comprising:
 a plurality of enlarged pads disposed on proximal and/or distal ends of the first and second sets of anchoring structures, the pads being configured promote positioning and deployment of the closure device and to provide a larger diameter contact footprint in areas of tissue contact.   
     
     
         9 . The implantable device of  claim 8 , wherein the pads comprise radiopaque markers marking terminal ends of both sets of anchoring structures during and following deployment. 
     
     
         10 . The implantable device of  claim 1 , wherein the first and second sets of anchoring structures comprise generally triangular structures having an overall length greater than a length of the intermediate collar structure. 
     
     
         11 . The implantable device of  claim 1 , wherein the first and second sets of anchoring structures comprise generally flattened wire structures having an overall length greater than a length of the intermediate collar structure. 
     
     
         12 . The implantable device of  claim 1 , further comprising: a membrane connected to the first and/or second set of more anchoring structures. 
     
     
         13 . The implantable device of  claim 1 , wherein the intermediate collar structure comprises a generally cylindrical reinforcing structure formed from ribs that form a generally cylindrical reinforcing structure and are generally denser than the anchoring structures. 
     
     
         14 . An implantable device for repairing an opening in a target tissue defect, the implantable device being adjustable from a delivery condition comprising a generally small diameter configuration to a deployed condition comprising a larger diameter configuration, the implantable device comprising:
 first and second sets of anchoring structures projecting from opposite sides of an intermediate collar structure and generally transverse with a closure structure,   wherein both sets of anchoring structures bend radially outwardly during the deployed condition;   wherein the first and second sets of anchoring structures are arranged in a substantially staggered or offset configuration.   
     
     
         15 . The implantable device of  claim 14 , wherein the first and second sets of anchoring structures bend radially outwardly during deployment to form a substantially circumferential, ring-like structure in the deployed condition. 
     
     
         16 . The implantable device of  claim 14 , wherein the first and second sets of anchoring structures comprise a shape change material and form a substantially cylindrical structure in the deployed condition. 
     
     
         17 . The implantable device of  claim 14 , further comprising:
 a plurality of pads disposed on proximal and/or distal ends of the first and second sets of anchoring structures, the pads being configured promote positioning and deployment of the closure device and to provide a larger diameter contact footprint in areas of tissue contact.   
     
     
         18 . The implantable device of  claim 14 , wherein the first and second sets of anchoring structures comprise are generally flattened wire structures having an overall length greater than a length of the intermediate collar structure. 
     
     
         19 . An implantable device for repairing an opening in a target tissue defect, the implantable device being adjustable from a delivery condition comprising a generally small diameter configuration to a deployed condition comprising a larger diameter configuration, the implantable device comprising:
 a closure structure sized to substantially cover the opening or cavity when the device is in the deployed condition;   first and second sets of anchoring structures projecting from opposite sides of an intermediate collar structure and generally transverse with the closure structure, wherein both sets of anchoring structures comprise a generally flattened structure and cross-sectional configuration to form a substantially circumferential, ring-like structure;   wherein the first and second sets of anchoring structures are configured to contact generally non-overlapping portions of tissue on opposite sides of the tissue defect being closed by the implantable device.   
     
     
         20 . The implantable device of  claim 19 , further comprising:
 a plurality of pads disposed on proximal and/or distal ends of the first and second sets of anchoring structures, the pads being configured promote positioning and deployment of the closure device and to provide a larger diameter contact footprint in areas of tissue contact.