Methods for placing materials into bone

Abstract

Cancellous bone is accessed through a subcutaneous access path in soft tissue. A cavity is formed in cancellous bone by a cavity forming tool that is advanced through the subcutaneous access path into cancellous bone and manipulated to form the cavity. A measured volume of bone filling material is delivered into the cavity through the subcutaneous access path by a nozzle having an interior bore defining an interior volume sized for containing bone filling material, which is advanced through the subcutaneous access path. A nested instrument is formed while clearing residual bone filling material from the interior bore by an auxiliary tool that can be manipulated independently of the nozzle, which is advanced through the interior bore of the nozzle.

22 . A kit comprising:
 an access tool sized and configured to provide an access path through soft tissue to bone having an exterior formed, at least in part, by cortical bone, and an interior volume occupied, at least in part, by cancellous bone;   an elongate tool sized and configured to fit within the access path, and create a passage in the cancellous bone; and   a void forming tool sized and configured to be introduced through the access path and into the passage to form a void in cancellous bone.   
     
     
         23 . The kit of  claim 22 , wherein the access tool comprises a cannula. 
     
     
         24 . The kit of  claim 22 , wherein the elongate tool comprises an obturator. 
     
     
         25 . The kit of  claim 22 , wherein the elongate tool comprises a drill. 
     
     
         26 . The kit of  claim 22 , wherein the void forming tool is carried by an elongate member sized and configured to pass through the access path. 
     
     
         27 . The kit of  claim 26 , wherein the void forming tool comprises an expandable body. 
     
     
         28 . The kit of  claim 27 , wherein the expandable body, when expanded, assumes a non-spherical shape. 
     
     
         29 . The kit of  claim 27 , wherein the elongate member comprises:
 a first catheter defining a first lumen for delivering an inflation fluid to the expandable body; and   a second catheter positioned at least partially within the first lumen.   
     
     
         30 . The kit of  claim 29 , wherein the expandable body possesses a preformed hour-glass or peanut shape. 
     
     
         31 . The kit of  claim 26 , further comprising an inflation source for delivering inflation fluid to the expandable body. 
     
     
         32 . The kit of  claim 22 , further comprising a nozzle sized and configured to be introduced through the access path and deliver filling material to the void.