Systems and methods for placing materials into bone

• US 6,241,734 B1
• Filed: 08/14/1998
• Issued: 06/05/2001
• Est. Priority Date: 08/14/1998
• Status: Expired due to Term

• Current Assignee: Orthophoenix, LLC (Marathon Patent Group, Inc.)
• Original Assignee: Kyphon Incorporated (Medtronic Plc)
• Inventors: Reo, Michael L., Reiley, Mark A., Boucher, Ryan, Scribner, Robert M.
• Primary Examiner(s): Recia, Henry J.
• Assistant Examiner(s): NGO, LIEN M
• Application Number:
  US09/134,323
• Time in Patent Office: 1,026 Days
• Field of Search: 606/93, 606/92, 606/94, 606/95, 606/96, 606/100, 606/102, 606/105, 606/192, 606/193.7, 606/194
• US Class Current: 606/93
• 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 17/7097 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 17/8805 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 17/8822 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 17/8833 Osteosynthesis tools specially adapted for handling bone cement or fluid fillers; Means for supplying bone cement or fluid fillers to introducing tools, e.g. cartridge handling means
• 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
• CPC Class Codes: A61B 2017/00867 shape memory effect
• 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 2002/4662 : 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

Systems and methods for delivering material into bone deploy a cannula through soft tissue to establish a subcutaneous path into bone. A material is introduced into bone through the cannula. The systems and methods advance a tamping instrument through the cannula to urge material residing in the cannula into bone. The introducing step delivers material at a pressure no greater than about 360 psi.

Claims

1. Apparatus for introducing material into bone through a subcutaneous cannula, the apparatus including a subcutaneous cannula, a delivery device to convey the material at a delivery pressure of no greater than about 360 psi, a nozzle instrument capable of advancement into the subcutaneous cannula and comprising a proximal fitting to couple the nozzle instrument to the delivery device and a nozzle terminus through which the material conveyed by the delivery device enters bone at the delivery pressure, and a tamping instrument capable of advancement into the subcutaneous cannula and having a tamping terminus which, during the advancement, urges material residing in the subcutaneous cannula into bone.

2. Apparatus according to claim 1

wherein the nozzle instrument is made of a generally flexible material.

3. Apparatus according to claim 1

wherein the nozzle instrument is made of a generally rigid material.

4. Apparatus according to claim 1

wherein the delivery device comprises a syringe.

5. Apparatus according to claim 1

wherein the tamping instrument includes markings to visually gauge the advancement of the tamping terminus through the subcutaneous cannula.

6. Apparatus according to claim 1

wherein the tamping instrument includes at least one radiopaque marker.

7. Apparatus according to claim 1

wherein the tamping instrument is made of a generally rigid material.

8. Apparatus according to claim 1

wherein the nozzle instrument includes markings to visually gauge the advancement of the nozzle terminus through the subcutaneous cannula.

9. Apparatus according to claim 1

wherein the nozzle instrument includes at least one radiopaque marker.

10. Apparatus according to claim 1 and further including a cavity forming instrument capable of advancement through the subcutaneous cannula to compress cancellous bone.

11. Apparatus according to claim 10

wherein the cavity forming instrument includes an expandable structure.

12. Apparatus for introducing material into bone through a subcutaneous cannula, the apparatus including a subcutaneous cannula, a delivery device to convey the material at a delivery pressure of no greater than about 360 psi, a nozzle instrument capable of advancement into the subcutaneous cannula and comprising a proximal fitting to couple the nozzle instrument to the delivery device and a nozzle bore through which the material conveyed by the delivery device enters bone at the delivery pressure, and a stylet capable of advancement into the nozzle bore through the proximal fitting to close the nozzle bore and, with the nozzle instrument, forming a tamping instrument capable of advancement into the subcutaneous cannula to urge residual material from the subcutaneous cannula.

13. Apparatus according to claim 12

wherein the nozzle instrument includes markings to visually gauge the advancement of the nozzle instrument through the cannula.

14. Apparatus according to claim 12

wherein the delivery device comprises a syringe.

15. Apparatus for introducing material into bone through a subcutaneous cannula, the apparatus comprising a subcutaneous cannula, a delivery device to convey the material into the subcutaneous cannula at a delivery pressure of no greater than about 360 psi, and a tamping instrument having a tamping terminus which, during advancement of the tamping instrument in the subcutaneous cannula, urges material residing in the subcutaneous cannula into bone.

16. Apparatus according to claim 15

wherein the delivery device comprises a syringe.

17. Apparatus according to claim 15

wherein the tamping instrument includes markings to visually gauge the advancement of the tamping terminus through the subcutaneous cannula.

18. Apparatus according to claim 15

wherein the tamping instrument includes at least one radiopaque marker.

19. Apparatus according to claim 15

wherein the tamping instrument is made of a generally rigid material.

20. Apparatus according to claim 15 and further including a cavity forming instrument capable of advancement through the subcutaneous cannula to compress cancellous bone.

21. Apparatus according to claim 15

wherein the cavity forming instrument includes an expandable structure.