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

• US 20070055277A1
• Filed: 09/27/2006
• Published: 03/08/2007
• Est. Priority Date: 04/06/1998
• Status: Abandoned Application

• Current Assignee: Orthophoenix, LLC (Marathon Patent Group, Inc.)
• Original Assignee: Kyphon Incorporated
• Inventors: Boucher, Ryan, Follmer, Marialulu, Layne, Richard, Basista, Joseph, Osorio, Reynaldo, Talmadge, Karen
• Application Number:
  US11/527,837
• Publication Number:
  US 20070055277A1
• Time in Patent Office: Days
• US Class Current: 606/92
• 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

An access tool is sized and configured to establish an access path through soft tissue to bone having an interior volume occupied, at least in part, by cancellous bone. A cavity forming structure has an array of bristles having at least an expanded configuration and an collapsed configuration. The cavity forming structure is introduced through the access tool into the cancellous bone volume. Retraction and advancement of the array of bristles is controlled within the cancellous bone volume in synchrony with rotation of the distal end portion to create a cavity. Material can be conveyed into the cavity.

Claims

1. A device comprising

an elongated shaft sized for deployment inside a cortical bone structure by passage through a percutaneous path, the shaft having a proximal end portion and a distal end portion, the distal end portion being sized for placement within a cancellous bone volume inside the cortical bone structure, the shaft including a material capable of transmitting rotational forces from the proximal end portion to the distal end portion in response to manipulation of the proximal end portion, and

a cavity forming structure carried by the distal end portion of the shaft, the cavity forming structure being sized for retraction and advancement in situ between a retracted position essentially fully withdrawn within the shaft and an advanced positioned projecting outside the distal end portion of the shaft, the cavity forming structure forming, when in the advanced position, an array of bristles having a dimension capable of forming a cavity within the cancellous bone volume to receive a volume of filling material.

2. A device according to claim 1

wherein the elongated shaft includes a longitudinal axis, and

wherein the bristles, when in the advanced position, extend generally along the longitudinal axis of the elongated shaft.

3. A device according to claim 2

wherein the bristles, when in the advanced position, radiate outward from the longitudinal axis of the elongated shaft.

4. A device according to claim 1

wherein at least one of the bristles is hollow.

5. A system comprising

an access tool sized and configured to establish an access path through soft tissue to bone having an interior volume occupied, at least in part, by cancellous bone,

a device as defined in claim 1 for forming a cavity in the cancellous bone volume, and

a filling device sized to be introduced through the percutaneous access path for conveying a material into the cavity.

6. A system according to claim 5

wherein the filling material comprises at least one of a bone cement, curable bio-material, allograft tissue, autograft tissue, an synthetic bone substitute.

7. A device according to claim 1

further including a handle on the proximal end portion coupled to the cavity forming structure configured to control retraction and advancement of the cavity forming structure within the cancellous bone volume in synchrony with rotation of the distal end portion to create the cavity.

8. A device according to claim 7

wherein the handle comprises a controller.

9. A method comprising

providing an access tool sized and configured to establish an access path through soft tissue to bone having an interior volume occupied, at least in part, by cancellous bone,

providing a device as defined in claim 1,

introducing the cavity forming structure through the access tool into the cancellous bone volume,

controlling retraction and advancement of the cavity forming structure within the cancellous bone volume in synchrony with rotation of the distal end portion to create a cavity, and

conveying material into the cavity.

10. A method comprising

selecting a vertebral body for treatment having a cortical wall enclosing a cancellous bone volume,

providing an access tool sized and configured to establish an access path through soft tissue to bone having an interior volume occupied, at least in part, by cancellous bone,

providing a device as defined in claim 1,

introducing the cavity forming structure through the access tool into the cancellous bone volume,

controlling retraction and advancement of the cavity forming structure within the cancellous bone volume in synchrony with rotation of the distal end portion to create a cavity, and

conveying material into the cavity.

11. A method comprising

providing an access tool sized and configured to establish an access path through soft tissue to bone having an interior volume occupied, at least in part, by cancellous bone,

providing a cavity forming structure comprising an array of bristles having at least an expanded configuration and an collapsed configuration,

introducing the cavity forming structure through the access tool into the cancellous bone volume,

controlling retraction and advancement of the array of bristles within the cancellous bone volume in synchrony with rotation of the distal end portion to create a cavity, and

conveying material into the cavity.

12. A method comprising

selecting a vertebral body for treatment having a cortical wall enclosing a cancellous bone volume,

providing an access tool sized and configured to establish an access path through soft tissue to bone having an interior volume occupied, at least in part, by cancellous bone,

introducing the cavity forming structure through the access tool into the cancellous bone volume,

controlling retraction and advancement of the array of bristles within the cancellous bone volume in synchrony with rotation of the distal end portion to create a cavity, and

conveying material into the cavity.