Methods and devices for treating fractured and/or diseased bone using an expandable stent structure

• US 8,226,717 B2
• Filed: 09/27/2006
• Issued: 07/24/2012
• Est. Priority Date: 08/14/1998
• Status: Expired due to Fees

• Current Assignee: Orthophoenix, LLC (Marathon Patent Group, Inc.)
• Original Assignee: Kyphon SARL (Medtronic Plc)
• Inventors: Osorio, Reynaldo A, Follmer, Marialulu, Layne, Richard W, Boucher, Ryan P, Talmadge, Karen D, Basista, Joseph J
• Primary Examiner(s): Robert, Eduardo C
• Assistant Examiner(s): CARTER, TARA ROSE E
• Application Number:
  US11/528,146
• Publication Number:
  US 20070055285A1
• Time in Patent Office: 2,127 Days
• Field of Search: 606/90, 606 92- 94, 606/105, 623 1711- 1712
• US Class Current: 623/17.11
• CPC Class Codes: A61B 17/1604 Chisels; Rongeurs; Punches; Stamps
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 17/3472 for bones, e.g. intraosseus injections
• CPC Class Codes: A61B 17/8805 for introducing fluid filler into bone or extracting it A61B17/7097, A61B17/8833 take precedence
• CPC Class Codes: A61B 17/8855 inflatable, e.g. kyphoplasty balloons
• CPC Class Codes: A61B 2017/00261 Discectomy
• CPC Class Codes: A61B 2017/00464 for use with different instruments with hole for different instruments A61B2017/22072
• CPC Class Codes: A61B 2017/00539 hydraulically
• CPC Class Codes: A61B 2017/00557 inflatable A61B2017/22051 takes precedence
• CPC Class Codes: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61B 2050/0065 Peelable cover
• CPC Class Codes: A61B 2090/062 penetration depth
• CPC Class Codes: A61B 50/33 Trays
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers
• CPC Class Codes: A61F 2/44 for the spine, e.g. vertebrae, spinal discs
• 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 2/4603 for insertion or extraction of endoprosthetic joints or of accessories thereof
• CPC Class Codes: A61F 2002/2835 Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
• CPC Class Codes: A61F 2002/3008 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61F 2002/30581 having a pocket filled with fluid, e.g. liquid
• CPC Class Codes: A61F 2002/4635 : using minimally invasive surgery
• CPC Class Codes: A61F 2002/4662 : for measuring penetration depth
• CPC Class Codes: A61F 2250/0098 : radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61F 2310/00353 : Bone cement, e.g. polymethylmethacrylate or PMMA

Abstract

A percutaneous path is established into a selected bone having an interior volume occupied, at least in part, by a cancellous bone, e.g., a vertebral body. An expandable stent structure is introduced into the cancellous bone by deployment of a tool through the percutaneous path into the cancellous bone. The expandable stent structure is expanded within cancellous bone.

Claims

1. A method comprising:

creating a percutaneous path into a bone having an interior volume occupied, at least in part, by a cancellous bone;

introducing an expandable stent structure having openings permitting fluid communication between an interior of the expandable stent structure and an interior volume of an expandable cavity-forming device into the cancellous bone by deployment of a tool through the percutaneous path into the cancellous bone; and

expanding the expandable stent structure within cancellous bone by injecting a medium through the openings in the expandable stent structure into the interior volume of the expandable cavity-forming device such that the cavity-forming device and the expandable stent structure are expanded to form the cavity.

2. A method according to claim 1 further including conveying a filling material into the cancellous bone to occupy the cancellous bone and the expandable stent structure.

3. A method according to claim 2 wherein the filling material comprises at least one of a bone cement, curable bio-material, allograft tissue, autograft tissue, an synthetic bone substitute.

4. A method according to claim 1 further including forming a cavity in the cancellous bone prior to introduction of the expandable stent structure.

5. A method according to claim 4 further including conveying a filling material into the cancellous bone to occupy the cancellous bone with the expandable stent structure.

6. A method according to claim 5 wherein the filling material comprises at least one of a bone cement, curable bio-material, allograft tissue, autograft tissue, and synthetic bone substitute.

7. A method according to claim 1 further including forming a cavity in the cancellous bone after introduction of the expandable stent structure.

8. A method according to claim 7 further including conveying a filling material into the cancellous bone to occupy the cancellous bone with the expandable stent structure.

9. A method according to claim 8 wherein the filling material comprises at least one of a bone cement, curable bio-material, allograft tissue, autograft tissue, an synthetic bone substitute.

10. A method according to claim 1 further including manipulating a second tool to withdraw the second tool through the access path, leaving the expandable stent structure within the cancellous bone.

11. A method according to claim 1 wherein the bone comprises a vertebral body.

12. A method according to claim 11 wherein the percutaneous path is established through a pedicle of the vertebral body.

13. A method according to claim 1 further including removing the cavity-forming device and leaving the stent within the cavity.

14. A method according to claim 1 wherein using the cavity-forming device includes expanding a balloon catheter within the stent.

15. A method according to claim 14 wherein expanding the balloon catheter within the stent includes simultaneous expansion of the balloon catheter and the stent.

16. A method according to claim 14 wherein using the cavity-forming device includes collapsing the balloon catheter and removing the balloon catheter from the cavity after expansion of the stent.