Devices and methods for vertebrostenting
First Claim
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1. An apparatus for forming a curvilinear void in bony structure comprising:
- a handle comprising a rotatable element and a handle spring;
a drill shaft extending from a distal end of the handle, the drill shaft having a flexible portion at a distal end of the drill shaft;
a cutting tip located at a distal end of a torqued tube, the cutting tip adapted to form the curvilinear void by simultaneous rotation and curvilinear translation of the cutting tip upon rotation of the rotatable element;
a feed screw;
a compression spring, wherein the compression spring is positioned distally from the feed screw and nearer to the distal end of the drill shaft; and
a band coupled at a distal end proximate to the cutting tip and at a proximal end to the compression spring that is different from the handle spring,wherein the torqued tube is configured to provide rotation of the cutting tip, wherein the torqued tube is configured to go through the drill shaft and the feed screw, andwherein, in an initial configuration, the flexible portion of the drill shaft is pretensioned to have a predetermined amount of flex.
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Abstract
The invention relates to methods of creating and/or enlarging a curvilinear cavity within a vertebral body or other body structure. The invention also relates to devices that may be used to perform the steps to create and/or enlarge the curvilinear cavity. In various embodiments, an apparatus for creating and/or enlarging a curvilinear cavity includes a handle and a flexible shaft assembly including a cutting tip or blade, a flexible rotatable drive shaft, and a flexible, moveable and non-rotatable housing.
616 Citations
25 Claims
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1. An apparatus for forming a curvilinear void in bony structure comprising:
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a handle comprising a rotatable element and a handle spring; a drill shaft extending from a distal end of the handle, the drill shaft having a flexible portion at a distal end of the drill shaft; a cutting tip located at a distal end of a torqued tube, the cutting tip adapted to form the curvilinear void by simultaneous rotation and curvilinear translation of the cutting tip upon rotation of the rotatable element; a feed screw; a compression spring, wherein the compression spring is positioned distally from the feed screw and nearer to the distal end of the drill shaft; and a band coupled at a distal end proximate to the cutting tip and at a proximal end to the compression spring that is different from the handle spring, wherein the torqued tube is configured to provide rotation of the cutting tip, wherein the torqued tube is configured to go through the drill shaft and the feed screw, and wherein, in an initial configuration, the flexible portion of the drill shaft is pretensioned to have a predetermined amount of flex. - View Dependent Claims (2, 3)
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4. An apparatus for enlarging a curvilinear void created in a body structure comprising:
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a handle having a handle spring located therein; a drill shaft extending from a distal end of the handle, the drill shaft having a flexible portion at a distal end of the drill shaft; a pivotable reaming blade located at a distal end of the flexible portion of the drill shaft; a band coupled at a distal end proximate to the reaming blade and at a proximal end to a compression spring that is different from the handle spring; a feed screw; and a torqued tube configured to couple with the reaming blade for pivotably adjusting the reaming blade with respect to a central elongate axis of the shaft, wherein the torqued tube is configured to go through the drill shaft and the feed screw, wherein the torqued tube is axially constrained in the drill shaft and advances with a pitch of the feed screw, and wherein, in an initial configuration, the flexible portion of the drill shaft is pretensioned to have a predetermined amount of flex. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for creating and enlarging a curvilinear void in a bony structure comprising:
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a handle having a handle spring; and a drill shaft extending from a distal end of the handle, the drill shaft having a flexible portion at a distal end of the drill shaft; a pivotable and elastically deflectable blade located at a distal end of the flexible portion of the drill shaft; a feed screw; a compression spring, wherein the compression spring is positioned distally from the feed screw and nearer to the distal end of the drill shaft; a band coupled at a distal end proximate to the blade and at a proximal end to the compression spring that is different from the handle spring; a torqued tube configured to couple with the deflectable blade for providing rotation of the deflectable blade, wherein the torqued tube is configured to go through the drill shaft and the feed screw, and a circumferentially partially slotted outer tube, wherein the slots enable the distal end of the drill shaft to bend in a predetermined direction. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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Specification