Percutaneous spinal implants and methods

• US 20070043363A1
• Filed: 06/16/2006
• Published: 02/22/2007
• Est. Priority Date: 02/17/2005
• Status: Active Grant

• Current Assignee: Medtronic Europe SARL (Medtronic Plc)
• Original Assignee: Kyphon SARL (Medtronic Plc)
• Inventors: Malandain, Hugues, Kohm, Andrew, Edidin, Avram
• Granted Patent: US 8,100,943 B2
• Time in Patent Office: Days
• US Class Current: 606/262
• CPC Class Codes: A61B 17/025 Joint distractors
• CPC Class Codes: A61B 17/7062 Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs rib fixation devices A61B17/8076; Tools for such devices
• CPC Class Codes: A61B 17/7065 Devices with changeable shape, e.g. collapsible or having retractable arms to aid implantation; Tools therefor
• CPC Class Codes: A61B 2017/00557 inflatable A61B2017/22051 takes precedence
• CPC Class Codes: A61B 2017/0256 for the spine

Abstract

An apparatus includes an elongate member having a portion configured to be deformed from a first configuration to a second configuration. In one variation, the apparatus includes an outer body, having a collapsed configuration and an expanded configuration, and an inner body. A portion of the outer body is configured to be disposed between adjacent spinous processes. The inner body is disposed within the interior region of the outer body. The inner body has an outer surface in slidable contact with an inner surface of the outer body.

Claims

1. An apparatus, comprising:

an outer body having a collapsed configuration and an expanded configuration, the outer body configured to be disposed between adjacent spinous processes; and

an inner body disposed within an interior area of the outer body, the inner body having an outer surface in slidable contact with an inner surface of the outer body.

2. The apparatus of claim 1, wherein:

the outer body has a first portion, a second portion and a third portion, the second portion being disposed between the first portion and the third portion; and

the inner body having a longitudinal length greater than a longitudinal length of the second portion of the outer body.

3. The apparatus of claim 1, wherein:

the outer body has a first portion, a second portion and a third portion, the second portion being disposed between the first portion and the third portion, the second portion configured to be disposed inside a region between adjacent spinous processes, the first portion and the third portion each being configured to be disposed outside the region between adjacent spinous processes; and

the inner body having a longitudinal length greater than a longitudinal length of the second portion of the outer body, the inner body contacting an inner surface of the second portion when the outer body is in the expanded configuration.

4. The apparatus of claim 1, wherein:

the outer body has a proximal portion, a middle portion and a distal portion, the proximal portion including at least one extension when the outer body is in the expanded configuration, the distal portion including at least one extension when the outer body is in the expanded configuration; and

the inner body having a longitudinal length greater than a longitudinal length of the middle portion of the outer body.

5. The apparatus of claim 1, wherein:

the outer body includes a first slot and a second slot, the first slot and the second slot collectively defining an expandable portion, the expandable portion being substantially elongate in a longitudinal direction when the outer body is in the collapsed configuration, the expandable portion being substantially transverse to the longitudinal direction when the outer body is in the expanded configuration.

6. The apparatus of claim 1, wherein:

the outer body includes a first slot and a second slot, the first slot and the second slot collectively defining an expandable portion, the expandable portion being substantially elongate in a longitudinal direction; and

the expandable portion, when the outer body is in the collapsed configuration, having a radius greater than a radius of a remaining portion of the outer body.

7. An apparatus, comprising:

an outer body having a collapsed configuration and an expanded configuration, the outer body having a longitudinal length along a first direction, the outer body configured to be percutaneously inserted when in the collapsed configuration, the outer body having a portion configured to be disposed between adjacent spinous processes when in the expanded configuration; and

an inner body disposed within an interior area of the outer body, the inner body configured to substantially maintain a shape of the portion of the outer body in a second direction substantially transverse to the first direction.

8. The apparatus of claim 7, wherein:

the inner body has a length along the first direction no less than a length of the portion of outer body along the first direction; and

at least a portion of the inner body having an outer surface substantially contacting an inner surface of the portion of the outer body when the outer body is in the expanded configuration.

9. The apparatus of claim 7, wherein:

at least a portion of the inner body has an outer surface substantially contacting an inner surface of the portion of the outer body when the outer body is in the expanded configuration; and

the inner body is configured to bear a load applied to the outer body by the adjacent spinous processes in the second direction when the outer body is in the expanded configuration and disposed between the adjacent spinous processes.

10. The apparatus of claim 7, wherein:

at least a portion of the inner body having an outer surface substantially contacting an inner surface of the portion of the outer body when the outer body is in the collapsed configuration; and

the inner body is configured to oppose a force applied to the outer body in the second direction by tissue through which a percutaneous path is defined when the outer body is in the collapsed configuration and is being percutaneously inserted.

11. The apparatus of claim 7, wherein:

the inner body has a length along the first direction less than a length of the outer body along the first direction when in the collapsed configuration; and

the length of the inner body is substantially equal to the length of the outer body along the first direction when in the expanded configuration.

12. The apparatus of claim 7, wherein:

a distal portion of the inner body is fixedly coupled to the outer body;

a proximal portion of the inner body is configured to receive a distal end of an insertion tool such that at least a portion of the insertion tool and the inner body collectively have an outer surface substantially contacting an inner surface of the outer body when the outer body is in the collapsed configuration; and

the portion of the insertion tool and the inner body collectively have a length along the first direction no less than a length of the outer body along the first direction.

13. An apparatus, comprising:

an outer body having a collapsed configuration and an expanded configuration, the outer body configured to be percutaneously inserted when in the collapsed configuration, a portion of the outer body configured to be maintained between adjacent spinous processes when in the expanded configuration; and

an inner body disposed within an interior area of the outer body and fixedly coupled to the outer body, the inner body having a length along a longitudinal direction less than a length of the outer body along the longitudinal direction.

14. The apparatus of claim 13, wherein:

the length of the inner body is no less than a length of the portion of the outer body along the longitudinal direction; and

at least a portion of the inner body has an outer surface substantially contacting an inner surface of the portion of the outer body when the outer body is in the expanded configuration.

15. The apparatus of claim 13, wherein:

at least a portion of the inner body having an outer surface substantially contacting an inner surface of the portion of the outer body when the outer body is in the expanded configuration; and

the inner body configured to bear a load applied to the outer body by the adjacent spinous processes in a direction substantially transverse to the longitudinal direction when the outer body is in the expanded configuration and disposed between the adjacent spinous processes.

16. The apparatus of claim 13, wherein:

at least a portion of the inner body having an outer surface substantially contacting an inner surface of the portion of the outer body when the outer body is in the collapsed configuration; and

the inner body configured to oppose a force applied to the outer body in the second direction by tissue through which a percutaneous path is defined when the outer body is in the collapsed configuration and is being percutaneously inserted.

17. The apparatus of claim 13, wherein:

the length of the inner body is less than a length of the outer body along the longitudinal direction when in the collapsed configuration; and

the length of the inner body is substantially equal to the length of the outer body along the longitudinal direction when in the expanded configuration.

18. The apparatus of claim 13, wherein:

a distal portion of the inner body is fixedly coupled to the outer body;

a proximal portion of the inner body is configured to receive a distal end of an insertion tool such that at least a portion of the insertion tool and the inner body collectively have an outer surface substantially contacting an inner surface of the outer body when the outer body is in the collapsed configuration; and

the portion of the insertion tool and the inner body collectively have a length along the longitudinal direction no less than the length of the outer body along the longitudinal direction.

19. An apparatus, comprising:

an outer body having a collapsed configuration and an expanded configuration, the outer body including a first slot and a second slot collectively defining an expandable portion, the expandable portion being substantially elongate in a longitudinal direction and having a radius greater than a remaining portion of the outer body when the outer body is in the collapsed configuration, at least a portion of the outer body configured to be maintained between adjacent spinous processes when in the expanded configuration.

20. The apparatus of claim 19, further comprising:

an inner body disposed within an interior area of the outer body and fixedly coupled to the outer body, the inner body having an outer surface in slidable contact with an inner surface of the outer body.