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US 8,771,317 B2Granted
Interspinous process implant and method of implantation
AssigneeWarsaw Orthopedic, Inc.
InventorsMingyan Liu, Jeffrey Zhang, Loic Josse
Life of this patent
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Abstract
Medical devices for the treatment of spinal conditions are described herein. The medical device of this invention includes a spacer that is disposed between adjacent spinous processes and has a proximal retention member and a distal retention member, which may be rotated with respect to the proximal retention member between an initial implantation configuration and a final locked configuration.
Claims16
A device, comprising:
- a first retention member having a central portion defining a longitudinal axis and an upper wing extending outward from the central portion transverse to the longitudinal axis, a lower wing extending outward from the central portion in a direction opposite to the upper wing and transverse to the longitudinal axis wherein the upper wing of the first retention member and the lower wing of the first retention member are configured to be disposed along a first side of a superior spinous process and an inferior spinous process;
- and
- a main body portion extending along the longitudinal axis and having a second retention member including an upper wing extending outward from the main body portion transverse to the longitudinal axis a lower wing extending outward from the main body portion in a direction opposite to the upper wing and transverse to the longitudinal axis wherein the upper wing of the second retention member and the lower wing of the second retention member are configured to be disposed along a second side of a superior spinous process and an inferior spinous process opposite the first side and being rotatable with respect to the first retention member between a first position such that upper and lower wings of the main body are disposed perpendicular to the upper and lower wings of the first retention member and a second position such that upper and lower wings of the main body are disposed parallel to the upper and lower wings of the first retention member,
- wherein the main body portion is rotatable between the first position and the second position.
1 more element
A device, comprising:
- a proximal retention member defining a central lumen therein, the proximal retention member includes a central portion defining a longitudinal axis and an upper wing extending outward from the central portion transverse to the longitudinal axis a lower wing extending outward from the central portion in a direction opposite to the upper wing and transverse to the longitudinal axis wherein the upper wing of the proximal retention member and the lower wing of the proximal retention member are configured to be disposed along a first side of a superior spinous process and an inferior spinous process;
- a main body portion extending along the longitudinal axis and having a distal retention member and a shaft having a proximal portion and a distal portion extending proximally from the distal retention member wherein the proximal portion is disposed in the central lumen, the distal retention member including an upper wing extending outward from the main body portion transverse to the longitudinal axis a lower wing extending outward from the main body portion in a direction opposite to the upper wing and transverse to the longitudinal axis wherein the upper wing of the distal retention member and the lower wing of the distal retention member are configured to be disposed along a second side of a superior spinous process and an inferior spinous process opposite the first side;
- at least one key disposed in the central lumen;
- and
- the proximal portion of the shaft defining at least one slot adapted to engage the at least one key,
- wherein the main body portion is rotatable between a first position such that upper and lower wings of the main body are disposed perpendicular to the upper and lower wings of the first retention member and a second position such that upper and lower wings of the main body are disposed parallel to the upper and lower wings of the first retention member.
3 more elements
Dependencies are inferred from the claim text.