The invention relates to devices and methods for creating a curvilinear cavity within a vertebral body or other body structure. An example method of forming a void in bony structure includes accessing a bony structure with a cannula, inserting a distal end of a combined drill and reaming device thro
The invention relates to devices and methods for creating a curvilinear cavity within a vertebral body or other body structure. An example method of forming a void in bony structure includes accessing a bony structure with a cannula, inserting a distal end of a combined drill and reaming device through the cannula and into the bony structure, manipulating the distal end of the combined drill and reaming device to create a void in the bony structure, and removing the distal end of the combined drill and reaming device from the cannula.
대표청구항▼
1. A method of forming a void in bony structure, the method comprising the steps of: accessing a bony structure with a cannula;inserting a distal end of a combined drill and reaming device through the cannula and into the bony structure, wherein the combined drill and reaming device comprises a knob
1. A method of forming a void in bony structure, the method comprising the steps of: accessing a bony structure with a cannula;inserting a distal end of a combined drill and reaming device through the cannula and into the bony structure, wherein the combined drill and reaming device comprises a knob, a slotted outer tube, a pivotable blade insertable in the slotted outer tube, a drive shaft extending through the slotted outer tube and operably connected to the pivotable blade, wherein the pivotable blade is capable of changing from a non-deployed drill configuration into a deployed ream configuration via rotation of the knob, wherein in the non-deployed drill configuration the pivotable blade is capable of translating proximally and distally while in the deployed ream configuration the pivotable blade is capable of translating only proximally and not distally; wherein in the non-deployed drill configuration the knob is disengaged from a ratcheting mechanism and in the deployed ream configuration the knob is engaged with the ratcheting mechanism;manipulating the distal end of the combined drill and reaming device to create a void in the bony structure; andremoving the distal end of the combined drill and reaming device from the cannula. 2. The method of claim 1, wherein the void formed comprises a curvilinear void. 3. The method of claim 1, wherein the step of manipulating of the distal end of the combined drill and reaming device comprises a simultaneous rotation and curvilinear translation of the pivotable blade. 4. The method of claim 3, wherein the step of manipulating of the distal end of the combined drill and reaming device comprises a simultaneous rotation and curvilinear translation of the pivotable blade away from a proximal end of the combined drill and reaming device while in a non-deployed configuration to drill a curvilinear void having a first effective cross-sectional diameter. 5. The method of claim 4, wherein the step of manipulating of the distal end of the combined drill and reaming device further comprises: pivoting the pivotable blade to a deployed configuration; and a simultaneous rotation and curvilinear translation of the deployed pivotable blade towards a proximal end of the combined drill and reaming device to ream a curvilinear void having a second enlarged effective cross-sectional diameter. 6. The method of claim 1, wherein the cannula is straight. 7. The method of claim 1, wherein the step of manipulating the distal end of the combined drill and reaming device comprises inducing a curvature in the distal end of the flexible drill shaft assembly. 8. The method of claim 7, wherein the flexible drill shaft assembly comprises a lever and cam sub assembly for varying a force used to apply the curvature to the distal end of the flexible drill shaft assembly. 9. The method of claim 8, further comprising the steps of: manipulating at least one lever to a first position to reduce the force on the distal end of the flexible drill shaft assembly prior to inserting the distal end of the combined drill and reaming device through the cannula; andreleasing the at least one lever to a second position to increase the force on the distal end of the flexible drill shaft assembly after inserting the distal end of the combined drill and reaming device through the cannula. 10. The method of claim 9, wherein the distal end of the flexible drill shaft assembly comprises a predetermined curvature when the at least one lever is in a released configuration. 11. The method of claim 9, further comprising the step of: moving the lever to the first position to reduce the force on the distal end of the flexible drill shaft assembly prior to removing the distal end of the combined drill and reaming device from the cannula. 12. A method of forming a void in bony structure, the method comprising the steps of: accessing a bony structure with a cannula;inserting a distal end of a combined drill and reaming device through the cannula and into the bony structure, wherein the combined drill and reaming device comprises a knob, a slotted outer tube, a pivotable blade insertable in the slotted outer tube, a ratcheting mechanism, and a drive shaft extending through the slotted outer tube and operably connected to the pivotable blade, wherein the pivotable blade is capable of changing from a non-deployed drill configuration into a deployed ream configuration via rotation of the knob, wherein in the non-deployed drill configuration the knob is disengaged from the ratcheting mechanism thereby allowing the pivotable blade to translate proximally and distally, and wherein in the deployed ream configuration the knob is engaged with the ratcheting mechanism thereby allowing the pivotable blade to translate only proximally and not distally;manipulating the distal end of the combined drill and reaming device to create a void in the bony structure; andremoving the distal end of the combined drill and reaming device from the cannula. 13. A method of forming a void in bony structure, the method comprising the steps of: accessing a bony structure with a cannula;inserting a distal end of a combined drill and reaming device through the cannula and into the bony structure, wherein the combined drill and reaming device comprises a knob, a slotted outer tube, a pivotable blade insertable in the slotted outer tube, a drive shaft extending through slotted outer tube and operably connected to the pivotable blade, wherein the pivotable blade is capable of changing from a non-deployed drill configuration into a deployed ream configuration via rotation of the knob, wherein in the non-deployed drill configuration the pivotable blade is capable of translating proximally and distally while in the deployed ream configuration the pivotable blade is capable of translating only proximally and not distally, wherein in the non-deployed drill configuration the knob is disengaged from a ratcheting mechanism and in the deployed ream configuration the knob is engaged with the ratcheting mechanism; andmanipulating the distal end of the combined drill and reaming device to create a void in the bony structure.
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