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    • 9. 发明申请
    • PERCUTANEOUS TECHNIQUE AND IMPLANT FOR EXPANDING THE SPINAL CANAL
    • 经皮技术和种植扩大脊髓管
    • WO2003079914A1
    • 2003-10-02
    • PCT/US2003/008565
    • 2003-03-19
    • DEPUY ACROMED, INC.ANDERSON, Greg, D.
    • ANDERSON, Greg, D.
    • A61B17/70
    • A61B17/8685A61B17/149A61B17/1617A61B17/1631A61B17/1637A61B17/1671A61B17/7071A61B17/8004A61B2017/22038A61B2090/037
    • The present invention expands a spinal (3) canal by drilling a cylindrical passage (7) in each pedicle (2) of a vertebra (1), making a circumferential pedicle cut (osteotomy) (11) through each pedicle (2) from within the passage (7), separating each pedicle cut (11) by inserting an implant (16) into the passage (7) which distracts the pedicle cut (11) to expand the spinal canal (3), and securing each pedicle cut (11), allowing the vertebra (1) to heal with the spinal canal (3) expanded. The implant (16) includes an outer sleeve (17), an inner bolt (18), and expandable flanges (21). The outer sleeve (17) includes an upper portion (19) and a lower portion (20), with the expandable flanges (21) connected to the lower portion (20) and housed within the upper portion (19). Rotation of the inner bolt (18) causes the upper and lower portions (19, 20) of the outer sleeve (17) to separate, causing the pedicle cut (11) to widen and the expandable flanges (21) to radially extend into and stabilize the widened pedicle cut (11) to effectuate expansion of the spinal canal (3).
    • 本发明通过在椎骨(1)的每个椎弓根(2)中钻出圆柱形通道(7)来扩张脊髓(3)管道,从而进行圆周椎弓根切割(截骨术)(11) 通过从通道(7)内穿过每个椎弓根(2),通过将植入物(16)插入通道(7)来分离每个椎弓根切口(11),通道(7)分开椎弓根切口(11)以扩张椎管(3) 并固定每个椎弓根切口(11),使得椎骨(1)在椎管(3)扩张的情况下愈合。 植入物16包括外套筒17,内螺栓18和可膨胀凸缘21。 外套筒17包括上部分19和下部分20,可膨胀凸缘21连接到下部分20并容纳在上部分19内。 内螺栓(18)的旋转导致外套筒(17)的上部分和下部分(19,20)分离,导致椎弓根切口(11)变宽,并且可膨胀凸缘(21)径向延伸进入 稳定扩大的椎弓根切口(11)以实现椎管(3)的扩张。