DEVICE AND METHOD FOR PERCUTANEOUS INTRAVERTEBRAL OSTEOTOMY

摘要

A device (10) for percutaneously forming an osteotomy cavity (18) within a vertebral body (7) includes a working cannula (8) having a passage extending therethrough from a proximal end to a distal end thereof, and a membrane (16) releasably attached to the distal end of an insertion member (12, 144) received within the cannula such as to direct the membrane to the distal end of the cannula and into the osteotomy cavity formed within the vertebral body. The membrane is at least partially cement-impermeable and displaceable between a contracted position, wherein the membrane is configured to fit through the passage of the cannula (8) and into the cavity (18), and an extended position, wherein the membrane (16) extends to at least partially enclose the osteotomy cavity (18) and to thereby limit egress of bone cement out of the cavity (18) within the vertebral body (7).