Systems and methods for posterior dynamic stabilization of the spine
First Claim
1. An interspinous device for stabilizing at least one spinal motion segment comprising a first vertebra having a first spinous process and a second vertebra having a second spinous process, the device comprising:
- a member having a length and a diameter and being deployable from a first configuration to a second configuration, wherein one of the length and the diameter of the member in the first configuration is changed when the member is in the second configuration, and wherein the member includes a central section,first and second end portions spaced apart to receive the first and second spinous processes therebetween, wherein the first and second end portions are configured to move along opposite sides of the first spinous process and to move along opposite sides of the second spinous process when the central section is positioned directly between the first and second spinous processes and the member moves from the first configuration to the second configuration, andwherein the central section is configured to be positioned between the first and second end portions such that the first and second end portions extend away from the central section when the member is in the second configuration, and wherein the central section is configured to contact and gradually push apart the first and second spinous processes when the member moves toward the second configuration for distracting the first and second spinous processes and when the central section extends transversely across the first and second spinous processes.
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Abstract
Devices, systems and methods for dynamically stabilizing the spine are provided. The devices include an expandable spacer or member having an unexpanded configuration and an expanded configuration, wherein the expandable member in an expanded configuration has a size, volume and/or shape configured for positioning between the spinous processes of adjacent vertebrae in order to distract the vertebrae relative to each other. The systems include one or more expandable members and a mechanical actuation means for expanding the expandable member. The methods involve the implantation of one or more devices or expandable spacers.
576 Citations
30 Claims
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1. An interspinous device for stabilizing at least one spinal motion segment comprising a first vertebra having a first spinous process and a second vertebra having a second spinous process, the device comprising:
a member having a length and a diameter and being deployable from a first configuration to a second configuration, wherein one of the length and the diameter of the member in the first configuration is changed when the member is in the second configuration, and wherein the member includes a central section, first and second end portions spaced apart to receive the first and second spinous processes therebetween, wherein the first and second end portions are configured to move along opposite sides of the first spinous process and to move along opposite sides of the second spinous process when the central section is positioned directly between the first and second spinous processes and the member moves from the first configuration to the second configuration, and wherein the central section is configured to be positioned between the first and second end portions such that the first and second end portions extend away from the central section when the member is in the second configuration, and wherein the central section is configured to contact and gradually push apart the first and second spinous processes when the member moves toward the second configuration for distracting the first and second spinous processes and when the central section extends transversely across the first and second spinous processes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An interspinous device for stabilizing at least one spinal motion segment comprising a first vertebra having a first spinous process and a second vertebra having a second spinous process, the interspinous device comprising:
a member having a length and a diameter and being deployable from a first configuration to a second configuration, wherein one of the length and the diameter of the member in the first configuration is changed when the member is in the second configuration, and wherein the member includes first and second end portions spaced apart to receive the first and second spinous processes therebetween, wherein the first and second end portions are configured to move along opposite sides of the first spinous process and to move along opposite sides of the second spinous process when the member is positioned between the first and second spinous processes and moves from the first configuration to the second configuration, a central section positioned between the first and second end portions such that the first and second end portions extend away from the central section when the member is in the second configuration, and wherein the central section is configured to contact and space apart the first and second spinous processes when the first and second spinous processes are located directly between the first and second end portions and when the member is in the second configuration such that the central section extends transversely across the first and second spinous processes, and a retaining member circumferentially positioned about a portion of the length of the member, wherein a diameter of the retained portion of the member is less than the diameter of the unretained portion of the member when the member is in the second configuration. - View Dependent Claims (15, 16, 17)
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18. An interspinous device movable from an undeployed configuration to a deployed H-shaped configuration, the interspinous device comprising:
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a first deployable portion configured to move superiorly along a first side of a superior spinous process of a subject and to move inferiorly along a first side of an inferior spinous process when the interspinous device is located between the superior and inferior spinous processes and moves toward the deployed H-shaped configuration; a second deployable portion that moves superiorly along a second side of the superior spinous process and moves inferiorly along a second side of the inferior spinous process when the interspinous device is located between the superior and inferior spinous processes and moves toward the deployed H-shaped configuration; and a central section between the first and second deployable portions, and wherein the central section is positioned to move into contact with and to extend laterally across the superior and inferior spinous processes when the superior and inferior spinous processes are located directly between the first and second deployable portions extending superiorly and inferiorly along the superior and inferior spinous processes, wherein the central section includes a superior portion and an inferior portion that move away from each other when the interspinous device is moved toward the deployed H-shaped configuration, and wherein the superior and inferior portions are configured to move away from each other and to contact the superior and inferior spinous processes, respectively, to push apart the superior and inferior spinous processes when the interspinous device is moved toward the deployed H-shaped configuration. - View Dependent Claims (19, 20, 21, 22)
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23. An interspinous device movable from an undeployed configuration to a deployed H-shaped configuration, the interspinous device comprising:
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a first deployable portion configured to move superiorly along a first side of a superior spinous process of a subject and to move inferiorly along a first side of an inferior spinous process when the interspinous device is located between the superior and inferior spinous processes and moves toward the deployed H-shaped configuration; a second deployable portion that moves superiorly along a second side of the superior spinous process and moves inferiorly along a second side of the inferior spinous process when the interspinous device is located between the superior and inferior spinous processes and moves toward the deployed H-shaped configuration; and a central section between the first and second deployable portions, and wherein the central section is positioned to move into contact with and to extend laterally across the superior and inferior spinous processes when the superior and inferior spinous processes are located directly between the first and second deployable portions extending superiorly and inferiorly along the superior and inferior spinous processes, and wherein the central section expands in superior and inferior directions relative to the subject when the interspinous device is located between the superior and inferior spinous processes and the interspinous device is moved toward the deployed H-shaped configuration.
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24. An interspinous device movable from an undeployed configuration to a deployed H-shaped configuration, the interspinous device comprising:
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a superior U-shaped portion configured to receive a superior spinous process when the interspinous device is in the deployed H-shaped configuration, the superior U-shaped portion including deployable superior portions and a superior central section between the deployable superior portions; and an inferior U-shaped portion configured to receive an inferior spinous process when the interspinous device is in the deployed H-shaped configuration, the inferior U-shaped portion including deployable inferior portions and an inferior central section between the deployable inferior portions, wherein the superior and inferior central sections move away from one another and into contact with the superior and inferior spinous processes of a subject and to distract the superior and inferior spinous processes as the interspinous device moves toward the deployed configuration, and wherein a distance between regions of the superior and inferior central sections for contacting the respective superior and inferior spinous processes increase at least by about 200% when the interspinous device moves from the undeployed configuration to the deployed H-shaped configuration. - View Dependent Claims (25, 26)
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27. An interspinous device movable from an undeployed configuration to a deployed configuration, the interspinous device comprising:
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a superior portion configured to be in a U-shaped configuration for retaining a superior spinous process when the interspinous device is in the deployed configuration, the superior portion including superior end portions and a superior central section between the superior end portions; and an inferior portion configured to be in a U-shaped configuration for retaining an inferior spinous process when the interspinous device is in the deployed configuration, the inferior portion including inferior end portions and an inferior central section between the inferior end portions, wherein the superior and inferior central sections move away from one another to increase a diameter of a member at the central section by 200% such that the superior and inferior central sections push apart the superior and inferior spinous processes as the interspinous device moves toward the deployed configuration to move the superior and inferior end portions along opposite sides of the superior and inferior spinous processes. - View Dependent Claims (28, 29, 30)
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Specification