Methods and apparatus for treating vertebral fractures

Abstract

Methods and apparatus for treating bones, including, in one or more embodiments, methods and apparatus for treatment of vertebral fractures that include an inflation device for cavity creation and an inflation and containment device for maintaining vertebral height and cement containment. Methods for treating a bone comprising: creating a cavity in the bone; inflating a containment jacket in the cavity; inflating a balloon within the containment jacket so that the balloon occupies a first portion of the containment jacket; introducing a first filler material into a second portion of the containment jacket, wherein the second portion of the containment jacket is not occupied by the balloon; removing the balloon from the containment jacket; and introducing a second filler material into the first portion of the containment jacket.

What is claimed is: 
     
         1 . A method for repairing a vertebral body, said method comprising:
 accessing the vertebral body via a cannula;   creating a cavity within cancellous bone of the vertebral body;   inserting an implantable device into the cavity via the cannula, wherein the implantable device comprises:
 a balloon implant having a neck portion and configured to receive bone cement, wherein the balloon implant has a larger size than the cavity; 
 a shaft rigidly attached to the neck portion at a distal end; 
 a hub attached to shaft at a proximal end; and 
 a filler needle disposed inside the shaft and configured to provide bone cement to the balloon implant; 
   delivering bone cement to the balloon implant;   detaching the balloon implant from the shaft via a detachment device, wherein the detachment device has two or more jaws configured to radially cut the balloon implant when rotated within the shaft.   
     
     
         2 . The method of  claim 1 , wherein the balloon implant and the shaft are bonded together. 
     
     
         3 . The method of  claim 1 , wherein the hub is configured to attach to a handle of the cannula. 
     
     
         4 . The method of  claim 3 , wherein the hub is configured to prevent at least one of rotation and axial movement of the implantable device. 
     
     
         5 . The method of  claim 4 , wherein the hub contains one or more wings to overlap the handle. 
     
     
         6 . The method of  claim 1 , wherein the jaws of the detachment device are driven open by a mandrel inserted in a cannulated portion of the detachment device. 
     
     
         7 . The method of  claim 1 , wherein the filler needle includes markings indicating a depth of the needle into the balloon implant. 
     
     
         8 . The method of  claim 1 , wherein the filler needle is configured to provide a clearance between the filler needle and the shaft to provide venting for air while maintaining liquid within the balloon implant. 
     
     
         9 . An implantable device for repairing a vertebral body, said implantable device comprising:
 a balloon implant having a neck portion and configured to receive bone cement, wherein the balloon implant has a larger size than the cavity;   a shaft rigidly attached to the neck portion at a distal end;   a hub attached to shaft at a proximal end; and   a filler needle disposed inside the shaft and configured to provide bone cement to the balloon implant;   a detachment device having two or more jaws configured to radially cut the balloon implant when rotated within the shaft.   
     
     
         10 . The device of  claim 9 , wherein the balloon implant and the shaft are bonded together. 
     
     
         11 . The device of  claim 9 , wherein the hub is configured to attach to a handle of the cannula. 
     
     
         12 . The device of  claim 11 , wherein the hub is configured to prevent at least one of rotation and axial movement of the implantable device. 
     
     
         13 . The device of  claim 12 , wherein the hub contains one or more wings to overlap the handle. 
     
     
         14 . The device of  claim 9 , wherein the jaws of the detachment device are driven open by a mandrel inserted in a cannulated portion of the detachment device. 
     
     
         15 . The device of  claim 9 , wherein the filler needle includes marking indicating a depth of the needle into the balloon implant. 
     
     
         16 . The device of  claim 9 , wherein the filler needle is configured to provide a clearance between the filler needle and the shaft to provide venting for air while maintaining liquid within the balloon implant. 
     
     
         17 . An implantable device for repairing a vertebral body, said implantable device comprising:
 a balloon implant having a neck portion and configured to receive bone cement, wherein the balloon implant has a larger size than the cavity;   a shaft attached to the neck portion at a distal end;   a hub attached to shaft at a proximal end; and   a filler needle disposed inside the shaft and configured to provide bone cement to the balloon implant.   
     
     
         18 . The device of  claim 17 , wherein the shaft further comprises a pair of steel tubes and the neck portion is disposed between the steel tubes and wherein the balloon implant is released from the shaft by retracting one of the pair of steel tubes. 
     
     
         19 . The device of  claim 17 , wherein the shaft is attached to the neck portion via threaded connection. 
     
     
         20 . The device of  claim 19 , wherein the shaft is configured to rotate to release the balloon implant from the threaded connection.