Systems and methods treating a vertebral body related applications

• US 20080132934A1
• Filed: 10/25/2007
• Published: 06/05/2008
• Est. Priority Date: 01/26/1994
• Status: Abandoned Application

• Current Assignee: Orthophoenix, LLC (Marathon Patent Group, Inc.)
• Original Assignee: Kyphon Incorporated (Medtronic Plc)
• Inventors: Scholten, Arie, Reiley, Mark A., Talmadge, Karen
• Application Number:
  US11/977,608
• Publication Number:
  US 20080132934A1
• Time in Patent Office: Days
• US Class Current: 606/192
• CPC Class Codes: A61B 17/8855 inflatable, e.g. kyphoplasty balloons
• CPC Class Codes: A61B 2017/0256 for the spine
• CPC Class Codes: A61F 2/28 Bones joints A61F2/30
• CPC Class Codes: A61F 2/441 made of inflatable pockets or chambers filled with fluid, e.g. with hydrogel
• CPC Class Codes: A61F 2/4601 for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/30535 Special structural features of bone or joint prostheses not otherwise provided for
• CPC Class Codes: A61F 2250/0058 Additional features; Implant or prostheses properties not otherwise provided for
• CPC Class Codes: A61M 2210/02 Bones
• CPC Class Codes: A61M 2210/1003 Spinal column
• CPC Class Codes: A61M 25/10 Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00
• CPC Class Codes: A61M 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence
• CPC Class Codes: A61M 29/02 Dilators made of swellable material balloon catheters for angioplasty A61M25/104

Abstract

A vertebral body is selected for treatment. The vertebral body has a cortical wall enclosing a cancellous bone volume. The vertebral body has at least one cortical plate that is depressed due to fracture. At least one maximum dimension for the cancellous bone volume is ascertained. An expandable device is provided having an expanded configuration and an unexpanded configuration. The expandable device has a predefined dimension when substantially expanded that is less than the maximum dimension. The expandable device is introduced into the vertebral body through a percutaneous access path while in the unexpanded condition. The expandable device is expanded while disposed within the cancellous bone volume from the unexpanded configuration toward the expanded configuration to move the fractured cortical plate toward a desired anatomic position.

Claims

1. A method comprising:

selecting a vertebral body for treatment, the vertebral body having a cortical wall enclosing a cancellous bone volume, the vertebral body having at least one cortical plate that is depressed due to fracture,

ascertaining a maximum anterior-to-posterior dimension for the vertebral body measured between anterior and posterior cortical walls,

providing an expandable device including an expanded configuration and an unexpanded configuration, the expandable device having a predefined dimension when substantially expanded that is less than the maximum anterior-to-posterior dimension,

introducing the expandable device into the vertebral body through a percutaneous access path while in the unexpanded condition, and

expanding the expandable device while disposed within the cancellous bone volume from the unexpanded configuration toward the expanded configuration to move the fractured cortical plate toward a desired anatomic position.

2. A method according to claim 1

further including placing a volume of filling material within the cancellous bone volume.

3. A method according to claim 2

wherein the filling material hardens within the vertebral body.

4. A method according to claim 2

wherein the filling material comprises bone cement.

5. A method according to claim 1

wherein, during the expanding, the expandable device expands more in an inferior-to-superior direction than in a lateral direction.

6. A method according to claim 1

wherein the expandable device expands by inflation.

7. A method according to claim 1

wherein the expandable device comprises a balloon.

8. A method according to claim 1

further including removing the expandable device from the vertebral body.

9. A method comprising

selecting a vertebral body for treatment, the vertebral body having a cortical wall enclosing a cancellous bone volume, the vertebral body having at least one cortical plate that is depressed due to fracture,

ascertaining a maximum lateral dimension for the vertebral body measured between lateral cortical walls, providing an expandable device including an expanded configuration and an unexpanded configuration, the expandable device having a predefined dimension when substantially expanded that is less than the maximum lateral dimension,

introducing the expandable device into the vertebral body through a percutaneous access path while in the unexpanded condition, and

expanding the expandable device while disposed within the cancellous bone volume from the unexpanded configuration toward the expanded configuration to move the fractured cortical plate toward a desired anatomic position.

10. A method according to claim 9

further including placing a volume of filling material within the cancellous bone volume.

11. A method according to claim 10

wherein the filling material hardens within the vertebral body.

12. A method according to claim 10

wherein the filling material comprises bone cement.

13. A method according to claim 9

wherein, during the expanding, the expandable device expands more in an inferior-to-superior direction than in a lateral direction.

14. A method according to claim 9

wherein the expandable device expands by inflation.

15. A method according to claim 9

wherein the expandable device comprises a balloon.

16. A method according to claim 9

further including removing the expandable device from the vertebral body.

17. A method comprising

selecting a vertebral body for treatment, the vertebral body having a cortical wall enclosing a cancellous bone volume, the vertebral body having at least one cortical plate that is depressed due to fracture,

ascertaining a maximum anterior-to-posterior dimension for the vertebral body measured between anterior and posterior cortical walls,

ascertaining a maximum lateral dimension for the vertebral body measured between lateral cortical walls,

providing an expandable device including an expanded configuration and an unexpanded configuration, the expandable device having a predefined dimension when substantially expanded that is less than the maximum anterior-to-posterior dimension and less than the maximum lateral dimension,

introducing the expandable device into the vertebral body through a percutaneous access path while in the unexpanded condition, and

expanding the expandable device while disposed within the cancellous bone volume from the unexpanded configuration to the expanded configuration to move the fractured cortical plate toward a desired anatomic position.

18. A method according to claim 17

further including placing a volume of filling material within the cancellous bone volume.

19. A method according to claim 18

wherein the filling material hardens within the vertebral body.

20. A method according to claim 18

wherein the filling material comprises bone cement.

21. A method according to claim 17

wherein, during the expanding, the expandable device expands more in an inferior-to-superior direction than in a lateral direction.

22. A method according to claim 17

wherein the expandable device expands by inflation.

23. A method according to claim 17

wherein the expandable device comprises a balloon.

24. A method according to claim 17

further including removing the expandable device from the vertebral body.

25. A method comprising

selecting a vertebral body for treatment, the vertebral body having a cortical wall enclosing a cancellous bone volume, the vertebral body having at least one cortical plate that is depressed due to fracture,

ascertaining at least one maximum dimension for the cancellous bone volume,

providing an expandable device including an expanded configuration and an unexpanded configuration, the expandable device having a predefined dimension when substantially expanded that is less than the maximum dimension,

introducing the expandable device into the vertebral body through a percutaneous access path while in the unexpanded condition, and

expanding the expandable device while disposed within the cancellous bone volume from the unexpanded configuration toward the expanded configuration to move the fractured cortical plate toward a desired anatomic position.