Radially expandable spinal interbody device and implantation tool

Patent metadata

Field	Value
Publication number	US-12048634-B2
Application number	US-202217679494-A
Country	US
Kind code	B2
Filing date	Feb 24, 2022
Priority date	Mar 29, 2007
Publication date	Jul 30, 2024
Grant date	Jul 30, 2024

Abstract

A spinal interbody device includes a base link comprising a first end and a second end, the base link including a cutout extending through the base link between the first end and the second end; a linkage including a first link having a first end coupled to the first end of the base link and a second end, the first link including a first aperture extending through the first link and defining a first longitudinal axis; and a second link having a first end coupled to the second end of the first link and a second end coupled to the second end of the base link, the second link including a second aperture extending through the second link and defining a second longitudinal axis. The base link and the first and second links define top and bottom surfaces configured to engage adjacent portions of bone, and first and second sides extending between the top and bottom surfaces. When the linkage is movable relative to the base link between a collapsed position and an expanded position, wherein when in the expanded position, an unobstructed line of sight is provided through the cutout and the first aperture along the first longitudinal axis and through the cutout and the second aperture along the second longitudinal axis.

First claim

What is claimed is:

1. An expandable implant comprising:
a base link comprising a first end, a second end, and a base link aperture extending through the base link from a first side of the base link to a second side of the base link, the first side of the base link being on a first side of the implant;
a first link comprising a first end coupled to the first end of the base link, a second end, and a first link aperture extending from a first side of the first link to a second side of the first link, the second side of the first link being on a second side of the implant; and
a second link comprising a first end coupled to the second end of the first link, a second end coupled to the second end of the base link, and a second link aperture extending from a first side of the second link to a second side of the second link, the second side of the second link being on the second side of the implant;
wherein when the implant is in an expanded configuration, a first line of sight is provided through the base link aperture and the first link aperture from the first side of the implant to the second side of the implant, and a second line of sight is provided through the base link aperture and the second link aperture from the first side of the implant to the second side of the implant.

2. The expandable implant of claim 1 , wherein when the implant is in a fully collapsed configuration, no line of sight is provided through the base link aperture and the first link aperture from the first side of the implant to the second side of the implant, and no line of sight is provided through the base link aperture and the second link aperture from the first side of the implant to the second side of the implant.

3. The expandable implant of claim 1 , wherein the base link, the first link, and the second link are configured such that as the expandable implant is moved from a collapsed position to an expanded position, a first cross-sectional area of the first line of sight changes and a second cross-sectional area of the second line of sight varies.

4. The expandable implant of claim 3 , wherein the base link, the first link, and the second link are made of a radiographic material.

5. The expandable implant of claim 1 , wherein at least one of the first link aperture and the second link aperture is cylindrical in shape.

6. The expandable implant of claim 1 , wherein the first end of the base link comprises a slot; and
wherein the first end of the first link defines a pivot point, wherein the first link pivots about the pivot point and the pivot point translates along a path defined by the slot.

7. The expandable implant of claim 1 , further comprising an adjustment member received by the base link; wherein manipulation of the adjustment member causes the expandable implant to move between a collapsed configuration and the expanded configuration.

8. The expandable implant of claim 7 , wherein the second end of the second link comprises a plurality of gears configured to engage the adjustment member, wherein rotation of the adjustment member causes the expandable implant to move between the collapsed configuration and the expanded configuration.

9. A method of implanting an expandable device, comprising:
positioning an expandable device in a desired location, the expandable device comprising a base link comprising a base link void and a first link comprising a first link void;
positioning an imaging device at a predetermined orientation relative to the expandable device;
adjusting the expandable device to a first degree of expansion;
acquiring an image portion using the imaging device, the image portion resulting from a first line of sight existing from the imaging device through the base link void and through the first link void;
determining a degree of expansion of the expandable device based on the image portion; and
adjusting the expandable device to a second degree of expansion.

10. The method of claim 9 , wherein the expandable device further comprises a second link comprising a second link void, and wherein the image portion further resulting from a second line of sight existing from the imaging device through the base link void and through the second link void.

11. The method of claim 9 , further comprising positioning the expandable device and the imaging device relative to one another such that as the expandable device is adjusted, the image portion acquired by the imaging device and resulting from the first line of sight changes in shape.

12. The method of claim 9 , wherein the expandable device further comprises a second link, wherein a first end of the first link is coupled to a first end of the base link, a second end of the first link is pivotally coupled to a first end of the second link, and a second end of the second link is coupled to a second end of the base link.

13. The method of claim 12 , wherein the first end of the base link comprises a slot;
wherein the first end of the first link pivots about a pivot point; and
wherein the pivot point translates along a path defined by the slot.

14. The method of claim 9 , wherein the expandable device further comprises:
an adjustment member received by the base link, wherein manipulation of the adjustment member causes the expandable device to move between a collapsed configuration and an expanded configuration; and
a second link, wherein a second end of the second link comprises a plurality of gears configured to engage the adjustment member, wherein rotation of the adjustment member causes the expandable device to move between the collapsed configuration and the expanded configuration.

15. An expandable implant comprising:
a base link comprising a first end, a second end, and a base link aperture positioned between the first end of the base link and the second end of the base link and extending through the base link from a first side of the base link to a second side of the base link, the first side of the base link being on a first side of the implant;
a first link comprising a first end coupled to the first end of the base link, a second end, and a first link aperture positioned between the first end of the first link and the second end of the first link and extending from a first side of the first link to a second side of the first link, the second side of the first link being on a second side of the implant;
a second link comprising a first end coupled to the second end of the first link, a second end coupled to the second end of the base link, and a second link aperture positioned between the first end of the second link and the second end of the second link and extending from a first side of the second link to a second side of the second link, the second side of the second link being on the second side of the implant;
wherein when the implant is in an expanded configuration, a first axis extends through the base link aperture from the first side of the base link to the second side of the base link and the first link aperture from the first side of the first link to the second side of the first link, and a second axis extends through the base link aperture from the first side of the base link to the second side of the base link and the second link aperture from the first side of the second link to the second side of the second link.

16. The expandable implant of claim 15 , wherein the first link aperture and the second link aperture are cylindrical in shape.

17. The expandable implant of claim 15 , wherein the base link, the first link, and the second link are made of radiographic material.

18. The

Assignees

• Life Spine Inc

Inventors

• Butler Michael S
• Predick Daniel
• Salinas Alexander Allen

Classifications

• A61F2002/30593

  hollow · CPC title

• A61F2002/3055

  for adjusting length · CPC title

• A61F2002/30471

  connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type · CPC title

• A61F2002/3008

  radio-opaque, e.g. radio-opaque markers · CPC title

• A61F2002/4627

  with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument · CPC title