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US20030004517A1 Expired / Lapsed US ⏱️ 0.0 years remaining

Percutaneous technique and implant for expanding the spinal canal

Assignee: ANDERSON MD DAVID GREG
•
Filing: 2002-03-19
•
Granted: —
•
Expires: 2022-03-19
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Abstract

Abstract The present invention expands a spinal canal by drilling a cylindrical passage in each pedicle of a vertebra, making a circumferential pedicle cut (osteotomy) through each pedicle from within the passage, separating each pedicle cut by inserting an implant into the passage which distracts the pedicle cut to expand the spinal canal, and securing each pedicle cut, allowing the vertebra to heal with the spinal canal expanded. The implant includes an outer sleeve, an inner bolt, and expandable flanges. The outer sleeve includes an upper portion and a lower portion, with the expandable flanges connected to the lower portion and housed within the upper portion. Rotation of the inner bolt causes the upper and lower portions of the outer sleeve to separate, causing the pedicle cut to widen and the expandable flanges to radially extend into and stabilize the widened pedicle cut to effectuate expansion of the spinal canal.

Inventors

  • 👤 D. Anderson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 06:31
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/70; A61B17/84; A61B17/86; A61B17/8685; A61B17/14; A61B17/149; A61B17/16; A61B17/1613; A61B17/1615; A61B17/1617; A61B17/1662; A61B17/1671; A61B17/7071; A61B17/1631; A61B17/1637; A61B17/80; A61B17/8004; A61B17/22; A61B2017/22038; A61B90/00; A61B90/03; A61B2090/037

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 49 words
1 . A method for expanding a spinal canal, comprising: cutting a vertebra through to the spinal canal in at least one location; widening each vertebral cut to expand the spinal canal; and securing each separated vertebral cut to allow the vertebra to heal with the spinal canal expanded.
Claim 2
Dependent Claim 49 words
1 . A method for expanding a spinal canal, comprising: cutting a vertebra through to the spinal canal in at least one location; widening each vertebral cut to expand the spinal canal; and securing each separated vertebral cut to allow the vertebra to heal with the spinal canal expanded.
Claim 3
Dependent Claim 43 words
2 . An implant for expanding a spinal canal, comprising: an outer sleeve; an inner bolt in communication with the outer sleeve, wherein movement of the inner bolt in relation to the outer sleeve widens a vertebral cut to expand the spinal canal.
Claim 4
Dependent Claim 43 words
2 . An implant for expanding a spinal canal, comprising: an outer sleeve; an inner bolt in communication with the outer sleeve, wherein movement of the inner bolt in relation to the outer sleeve widens a vertebral cut to expand the spinal canal.

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