Systems and methods for treating vertebral bodies

• US 7,938,835 B2
• Filed: 05/10/2004
• Issued: 05/10/2011
• 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: Boucher, Ryan P, Reiley, Mark A, Scribner, Robert M, Reo, Michael L
• Primary Examiner(s): Robert; Eduardo C
• Assistant Examiner(s): HARVEY, JULIANNA NANCY
• Application Number:
  US10/842,076
• Publication Number:
  US 20040210231A1
• Time in Patent Office: 2,556 Days
• Field of Search: 606 92- 94
• US Class Current: 606/93
• CPC Class Codes: A61B 17/1631 Special drive shafts, e.g. flexible shafts A61B17/1642, A61B17/164 take precedence
• CPC Class Codes: A61B 17/1662 for particular parts of the body
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 17/1757 for the spine
• CPC Class Codes: A61B 17/3403 Needle locating or guiding means guides for suture needles A61B17/0482; guiding or tracking by nuclear magnetic resonance G01R33/285
• CPC Class Codes: A61B 17/3417 Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating syringe needles A61M5/32; dilators A61M29/00
• CPC Class Codes: A61B 17/3472 for bones, e.g. intraosseus injections
• CPC Class Codes: A61B 17/68 Internal fixation devices , including fasteners and spinal fixators, even if a part thereof projects from the skin bone staples A61B17/0642
• CPC Class Codes: A61B 17/7097 Stabilisers comprising fluid filler in an implant, e.g. balloon; devices for inserting or filling such implants disc prostheses made of inflatable chambers or pockets filled with fluid A61F2/441; replacing the nucleus pulposus A61F2002/444
• CPC Class Codes: A61B 17/88 Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices A61B17/7074 takes precedence
• 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 17/8816 characterised by the conduit, e.g. tube, along which fluid flows into the body or by conduit connections
• CPC Class Codes: A61B 17/8819 characterised by the introducer proximal part, e.g. cannula handle, or by parts which are inserted inside each other, e.g. stylet and cannula A61B17/8825 takes precedence
• CPC Class Codes: A61B 17/8822 characterised by means facilitating expulsion of fluid from the introducer, e.g. a screw pump plunger, hydraulic force transmissions, application of vibrations or a vacuum
• 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 2017/00544 pneumatically
• 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 2090/034 : abutting on parts of the device itself
• CPC Class Codes: A61B 2090/062 : penetration depth
• CPC Class Codes: A61B 2090/3933 : Liquid markers
• CPC Class Codes: A61B 2090/3937 : Visible markers
• 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: A61B 90/90 : Identification means for patients or instruments, e.g. tags
• 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 2002/2817 : Bone stimulation by chemical reactions or by osteogenic or biological products for enhancing ossification, e.g. by bone morphogenetic or morphogenic proteins [BMP] or by transforming growth factors [TGF]
• 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 2002/30677 : Means for introducing or releasing pharmaceutical products, e.g. antibiotics, into the body
• CPC Class Codes: A61F 2002/4635 : using minimally invasive surgery
• CPC Class Codes: A61F 2002/4662 : for measuring penetration depth
• CPC Class Codes: A61F 2002/4685 : by means of vacuum
• 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 system for treating a vertebral body comprises a cannula leading into a vertebral body and a cavity creating device. The cavity creating device comprises a shaft having a distal end portion sized to extend through the cannula, an expandable body that undergoes expansion between a collapsed condition and an expanded condition to form a cavity in the vertebral body, and a tubular fluid transport member to convey fluid through the distal region of the expandable body and into the cavity. The system further comprises a device coupled to the shaft to change the expandable body between the collapsed condition to the expanded condition. The system further comprises a source of fluid coupled to the tubular fluid transport member to convey fluid through the distal region of the expandable body and into the cavity. The system further includes a device to convey a filling material into the cavity.

Claims

1. A system for treating a vertebral body comprising

a cannula sized and configured to establish a percutaneous path leading into a vertebral body;

a cavity creating device comprising

a shaft having an outer surface and a distal end portion sized to extend through the cannula and into the vertebral body,

an expandable body having a proximal region attached to the outer surface of the distal end portion of the shaft and having a distal region positioned distally beyond the distal end portion of the shaft, the expandable body sized and configured for contacting cancellous bone and for undergoing expansion between a collapsed condition and an expanded condition to form a cavity in cancellous bone of the vertebral body, and

a tubular fluid transport member extending through the shaft and beyond the distal end portion of the shaft and extending through the expandable body, the tubular fluid transport member sized and configured to convey fluid through the distal region of the expandable body and into the cavity;

a device coupled to the shaft to expand the expandable body from the collapsed condition to the expanded condition and to return the expandable body from the expanded condition to the collapsed condition;

a source of fluid coupled to the tubular fluid transport member to convey fluid through the distal region of the expandable body and into the cavity to resist formation of a vacuum within the cavity as the expandable body is returned from the expanded condition to the collapsed condition; and

a device to convey a filling material into the cavity.

2. A system according to claim 1

wherein the expandable body, during expansion to the expanded condition, applies force capable of moving cortical bone toward a restored position, and

wherein fluid conveyed through the distal end portion of the shaft into the cavity resists movement of cortical bone away from the restored position as the expandable body is returned from the expanded condition to the collapsed condition.

3. A system according to claim 1

wherein the source of fluid comprises a source of liquid.

4. A system according to claim 1

wherein the source of fluid comprises a source of air.

5. A system according to claim 1

wherein the source of fluid includes a pump.

6. A system according to claim 1

further including a source of compression-resistant material comprising the filling material.

7. A system according to claim 1

further including a source of a medication comprising the filling material.

8. A system according to claim 1

further including a source of a flowable material which sets to a hardened condition comprising the filling material.

9. The system of claim 1 wherein the tubular fluid transport member extends beyond the distal region of the expandable body.