SYSTEMS AND METHODS FOR FORMING A CAVITY IN CANCELLOUS BONE
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Abstract
A cavity creating device having a cavity creating axis is introduced through a percutaneous access path into a cancellous bone volume, e.g., within a vertebral body. The cavity creating device is manipulated to form a cavity in the cancellous bone volume. The manipulation includes deflecting the cavity creating device along the cavity creating axis relative to the axis of the access path. A material, such as bone cement, can be conveyed into the cavity.
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Citations
26 Claims
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1-14. -14. (canceled)
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15. An instrument for forming a cavity in cancellous bone comprising:
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a generally straight catheter tube having a proximal end, a distal end, a first lumen and a second lumen; an expandable structure disposed at the distal end of the catheter tube, the expandable structure having a distal end and communicating with the first lumen of the catheter tube; and a generally straight stiffening stylet inserted into the second lumen of the catheter tube; wherein the second lumen extends through the first lumen of the catheter tube to the distal end of the expandable structure.
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20. An instrument for forming a cavity in cancellous bone comprising:
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a generally straight outer catheter tube including a distal end and a first lumen; a generally straight inner catheter tube extending within the outer catheter tube and including a distal end and a second lumen, wherein the distal end of the inner catheter tube extends beyond the distal end of the outer catheter tube; an expandable structure communicating with the first lumen; and a generally straight stiffening stylet sized for insertion into the second lumen. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification