Spinal correction construct and method
AssigneeWarsaw Orthopedic, Inc.
InventorsJoshua W. Simpson, William Alan Rezach, Richard Quinn Brown, Rodney R. Ballard
Life of this patent
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Abstract
A method for treating a spinal disorder includes the steps of: disposing an expandable spinal construct in a selected configuration; fixing the spinal construct in the selected configuration with a member; attaching a first end of the spinal construct with tissue; attaching a second end of the spinal construct with tissue; and disengaging the member from the spinal construct to release the spinal construct from the selected configuration. Implants, surgical instruments, systems and methods are disclosed.
Claims21
1-20. (canceled)
A spinal construct comprising:
- a sleeve extending between opposite first and second ends;
- a first rod comprising opposite first and second ends, the first end of the first rod being fixed to the first end of the first sleeve;
- and
- a second rod comprising opposite first and second ends, the first end of the second rod being movably positioned in the sleeve, the first end of the second rod being configured for connection with a biasing member, the biasing member comprising first and second chambers and fluid positioned in the first chamber, the biasing member being configured to move the fluid from the first chamber to the second chamber to maintain a constant force to the first end of the second rod.
A spinal construct comprising:
- a sleeve extending between opposite first and second ends, the sleeve defining a first chamber and a second chamber, the spinal construct comprising a fluid in the first chamber, the sleeve comprising a valve configured to allow the fluid to moves from the first chamber to the second chamber and to prevent the fluid from moving from the second chamber to the first chamber;
- a first rod comprising opposite first and second ends, the first end of the first rod being permanently fixed to the first end of the first sleeve;
- and
- a second rod comprising opposite first and second ends, the first end of the second rod being movably positioned in the sleeve and connected with the biasing member,
- wherein the biasing member is configured to move the fluid from the first chamber to the second chamber to maintain a constant force to the first end of the second rod.
A spinal construct comprising:
- a sleeve extending between opposite first and second ends, the sleeve defining a high pressure chamber and a low pressure chamber, the spinal construct comprising a fluid in the high pressure chamber, the sleeve comprising a one-way valve configured to allow the fluid to moves from the high pressure chamber to the low pressure chamber and to prevent the fluid from moving from the low pressure chamber to the high pressure chamber;
- a first rod comprising opposite first and second ends, the first end of the first rod being permanently fixed to the first end of the first sleeve, an end surface of the first end of the first rod defining a portion of the high pressure chamber;
- and
- a second rod comprising opposite first and second ends, the first end of the second rod being movably positioned in the sleeve and connected with the biasing member such that the low pressure chamber is positioned between the high pressure chamber and the second rod, the spinal construct comprising a wall, the wall being fixed to the first end of the second rod, the wall defining a portion of the low pressure chamber,
- wherein the biasing member is configured to move the fluid from the first chamber to the second chamber to maintain a constant force to the first end of the second rod and
- wherein the second chamber increases in volume as the fluid moves from the first chamber to the second chamber.
Dependencies are inferred from the claim text.