Occlusive medical device with fixation members

Abstract

An example occlusive implant is disclosed. The example occlusive implant includes an expandable framework configured to shift between a collapsed configuration and an expanded configuration, wherein the expandable framework includes a plurality of strut members circumferentially spaced around a longitudinal axis of the expandable framework, wherein one or more of the plurality of strut members includes a first twisted portion and a face portion. The occlusive implant also includes a plurality of fixation members disposed along the face portion of one or more of the plurality of strut members.

1 . A medical implant, comprising:
 an expandable framework having a plurality of struts disposed about a central longitudinal axis, the plurality of struts being joined at a proximal hub and a distal hub, wherein the expandable framework includes a distal shoulder region extending from the distal hub to a distal shoulder region end point; and   a membrane disposed along an outer surface of the expandable framework, wherein the membrane extends along the outer surface of the expandable framework from the proximal hub to a membrane end point, and wherein the expandable framework includes a plurality of straight struts extending between the membrane end point and the distal shoulder region end point.   
     
     
         2 . The medical implant of  claim 1 , wherein the expandable framework further includes a proximal shoulder region, wherein the proximal shoulder region includes a first grouping of cells adjacent to the proximal hub and defining a first row, and wherein a first cell in the first row of cells includes a first strut segment and a second strut segment joined at a first distal node. 
     
     
         3 . The medical implant of  claim 2 , wherein the first row of cells extends circumferentially around the central longitudinal axis of the expandable framework. 
     
     
         4 . The medical implant of  claim 3 , wherein the expandable framework further includes a second grouping of cells defining a second row adjacent to the first row. 
     
     
         5 . The medical device of  claim 4 , wherein the width of at least one cell of the second grouping of cells is different than the width of the cells defining the first grouping of cells. 
     
     
         6 . The medical device of  claim 5 , wherein the width of at least one cell of the second grouping of cells is wider than the width of the cells defining the first grouping of cells. 
     
     
         7 . The medical implant of  claim 1 , wherein the expandable framework further includes a plurality of fixation members disposed thereon. 
     
     
         8 . The medical implant of  claim 7 , wherein the expandable framework and the plurality of fixation members are formed from a unitary tubular member. 
     
     
         9 . The medical implant of  claim 8 , wherein at least a portion of the plurality of fixation members extend through an aperture formed in the membrane. 
     
     
         10 . The medical implant of  claim 1 , wherein the plurality of struts extending between the proximal hub and the distal hub define an interior volume of the expandable framework, and wherein the proximal hub is located outside the interior volume of the expandable framework and the distal hub is located within the interior volume of the expandable framework. 
     
     
         11 . The medical implant of  claim 1 , wherein the expandable framework is configured to shift between a first unexpanded configuration and an expanded configuration, and wherein when in the expanded configuration, the distal hub is positioned proximal of a distalmost extent of the expandable framework. 
     
     
         12 . An occlusive implant, comprising:
 an expandable framework configured to shift between a collapsed configuration and an expanded configuration, wherein the expandable framework includes a plurality of strut members circumferentially spaced around a longitudinal axis, the plurality of strut members being joined at a proximal hub and a distal hub, and wherein the expandable framework includes a distal shoulder region extending from the distal hub to a distal shoulder region end point;   a membrane disposed along an outer surface of the expandable framework, wherein the membrane extends along the outer surface of the expandable framework from the proximal hub to a membrane end point, and wherein the expandable framework includes a plurality of straight struts extending between the membrane end point and the distal shoulder region end point; and   a plurality of fixation members disposed along the expandable framework.   
     
     
         13 . The occlusive implant of  claim 12 , wherein the expandable framework further includes a proximal shoulder region including a first grouping of cells adjacent to the proximal hub and defining a first row, and wherein a first cell in the first row of cells includes a first strut segment and a second strut segment joined at a first distal node. 
     
     
         14 . The medical implant of  claim 13 , wherein the expandable framework further includes a second grouping of cells defining a second row adjacent to the first row. 
     
     
         15 . The medical device of  claim 14 , wherein the width of at least one cell of the second grouping of cells is different than the width of the cells defining the first grouping of cells. 
     
     
         16 . The occlusive implant of  claim 15 , wherein the plurality of fixation members and the expandable framework are formed from a unitary tubular member. 
     
     
         17 . The occlusive implant of  claim 12 , wherein the membrane extends circumferentially around the outer surface of the expandable framework. 
     
     
         18 . The occlusive implant of  claim 12 , wherein at least a portion of the plurality of fixation members extend through an aperture formed in the membrane. 
     
     
         19 . The medical implant of  claim 18 , wherein the plurality of struts extending between the proximal hub and the distal hub define an interior volume of the expandable frame, and wherein the proximal hub is located outside the interior volume of the expandable frame and the distal hub is located within the interior volume of the expandable frame. 
     
     
         20 . A method for occluding a left atrial appendage of a patient, the method comprising:
 positioning an occlusive implant adjacent the left atrial appendage, the occlusive implant including;
 an expandable framework having a plurality of struts disposed about a central longitudinal axis, the plurality of struts being joined at a proximal hub and a distal hub, wherein the expandable framework includes a distal shoulder region extending from the distal hub to a distal shoulder region end point; and 
 a membrane disposed along an outer surface of the expandable framework, wherein the membrane extends along the outer surface of the expandable framework from the proximal hub to a membrane end point, and wherein the expandable framework includes a plurality of straight strut extending between the membrane end point and the distal shoulder region end point; and 
   expanding the occlusive implant within the left atrial appendage such that the membrane extends across an ostium of the left atrial appendage.