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US 5,782,831 AGranted
Method an device for spinal deformity reduction using a cable and a cable tensioning system
AssigneeSDGI Holdings, Inc.
InventorsMichael C. Sherman, Troy D. Drewry
Life of this patent
Estimating the term…
Abstract
A reduction system and method is disclosed for reducing a displaced vertebra between adjacent vertebrae. The system can include an anchor 60 placed in the displaced vertebra 70b, a cable 11 attached to the anchor 60 and a clamping member 50 which can selectively engage or disengage the cable 11 to maintain its position. The clamping member can be seated in a rod connector 58 attached to a rod 80 running along the longitudinal axis of the spinal column. A tensioning force can be applied to the cable 11 to pull vertebra 70b toward the rod 80. Once the vertebra 70b is pulled into the desired position, the anchor can be secured to the rod to maintain the position of the vertebra and the reduction apparatus is removed.
Claims31
An apparatus for use in reducing a displaced vertebra in the spine, said apparatus comprising:
- a longitudinal member positionable along the longitudinal axis of a spine;
- an anchor configured to be secured to a displaced vertebra;
- an elongated member having a first portion attached to said anchor and a second portion;
- a clamping member positionable along said longitudinal member adjacent the displaced vertebra said clamping member defining a channel for receiving said second portion of said elongated member, said clamping member operable between an open configuration permitting movement of said elongated member through said channel and a clamping configuration engaging said elongated member to prevent movement of said elongated member through said channel;
- and
- means for pulling said elongated member through said channel, whereby the displaced vertebra can be pulled toward said longitudinal member.
3 more elements
An apparatus for reducing a displaced vertebra in the spine, said apparatus comprising:
- a longitudinal member positionable along the longitudinal axis of a spine;
- an anchor configured to be secured to a displaced vertebra;
- an elongated member having a first end attached to said anchor and a second end;
- a clamping member positionable along said longitudinal member adjacent the displaced vertebrae and engaging a portion of said elongated member between said first end and said second end, said clamping member operable to selectively clamp said elongated member;
- means for pulling said elongated member toward said clamping member, whereby the displaced vertebra can be pulled toward said longitudinal member;
- and
- said clamping member includes a lever for operating said clamping member between an open position permitting free movement of said elongated member and a clamping position clamping said elongated member in a stationary position.
4 more elements
An apparatus for use in reducing a displaced vertebra of the spine, said apparatus comprising:
- a longitudinal member positionable along the longitudinal axis of the spine;
- means for engaging a displaced vertebrae;
- a flexible elongated member having a first portion connected to said engaging means and a second portion;
- means for securing said flexible elongated member positionable along said longitudinal member adjacent the displaced vertebra, said means for securing having a channel for slidably receiving said flexible elongated member and operable to selectively engage said second portion of said elongated member to prevent movement of the vertebrae away from said longitudinal member;
- and
- means for pulling said elongated member through said channel, thereby the displaced vertebra can be pulled toward said longitudinal member.
3 more elements
An apparatus for use in reducing a displaced vertebra in the spine, said apparatus comprising:
- a longitudinal member positionable along the longitudinal axis of the spine;
- an anchor secured to a displaced vertebra;
- a flexible elongated member attached to said anchor;
- and
- a tensioning tool positionable along said longitudinal member adjacent the displaced vertebra, said tensioning tool including a gripping portion for gripping said elongated member and a bearing portion for bearing against said longitudinal member, said gripping portion moveable with respect to said bearing portion.
2 more elements
An apparatus for use in reducing a displaced vertebra in the spine, said apparatus comprising:
- a longitudinal member positionable along the longitudinal axis of the spine;
- means for engaging a vertebra;
- a flexible elongated member attached to said engaging means;
- and p1 means for pulling said elongated member, said means including a gripping portion for gripping said elongated member and a bearing portion for bearing against said longitudinal member, said gripping portion moveable with respect to said bearing portion, whereby movement of said gripping portion with respect to said bearing portion pulls said engaging means towards said longitudinal member.
1 more element
A method for aligning a displaced vertebra, comprising the steps of:
- connecting a flexible elongated member to an anchoring element;
- attaching the anchoring element to a displaced vertebra;
- positioning a longitudinal member along the longitudinal axis of the spine;
- positioning a clamping device having a channel to bear against the longitudinal member;
- threading an end of the elongated member opposite the anchoring element through the channel of the clamping device;
- pulling the elongated member to move the elongated member through the channel of the clamping device, thereby moving the displaced vertebra toward the longitudinal member;
- and
- clamping the elongated member to maintain the vertebra in a desired position.
5 more elements
A method for aligning a displaced vertebra, comprising the steps of:
- connecting an elongated member to an anchoring element;
- attaching the anchoring element to a displaced vertebra;
- positioning a longitudinal member along the longitudinal axis of the spine;
- positioning a clamping device to bear against the longitudinal member;
- threading an end of the elongated member opposite the anchoring element through the clamping device;
- pulling the elongated member to move the elongated member through the clamping device, thereby moving the displaced vertebra toward the longitudinal member;
- clamping the elongated member to maintain the vertebra in a desired position;
- removing the clamping device;
- cutting the elongated member adjacent the anchoring element;
- and
- interconnecting the anchoring element and the longitudinal member to maintain the vertebra in the desired position.
8 more elements
A method for aligning a displaced vertebra, comprising the steps of:
- connecting an elongated member to an anchoring element;
- attaching the anchoring element to a vertebra;
- positioning a longitudinal member along the longitudinal axis of the spine;
- positioning a tensioning tool to bear against the longitudinal member;
- grasping the elongated member with the tensioning tool;
- and
- pulling the elongated member toward the longitudinal member and into a desired position.
4 more elements
An apparatus for use in the spine, said apparatus comprising:
- an elongated rod positionable along the longitudinal axis of a spine;
- an anchor configured to be securable to a vertebra;
- an elongated member having a first portion attached to said anchor and a second portion;
- a rod connector adapted to engage said rod and positionable along said rod adjacent said vertebra;
- a clamping member operable to selectively clamp said elongated member, said clamping member including a threaded end;
- a clamp fixture adapted to engage said rod connector and to maintain said clamping member a spaced distance from said rod connector, said fixture having a lower portion adapted to engage said rod connector and an upper portion having an axial bore therein adapted to receive said clamping member, said clamp fixture defining a central opening between said lower portion and said upper portion;
- means for pulling said elongated member toward said clamping member, thereby pulling the vertebra toward said longitudinal member;
- and
- a threaded nut adapted to engage said threaded end of said clamping member, wherein said threaded end extends through said axial bore into said central opening of said clamping fixture, said threaded nut engages said threaded end to maintain said clamping member in position and said lower portion of said clamp fixture engages said rod connector.
6 more elements
Dependencies are inferred from the claim text.