Structures and methods for creating cavities in interior body regions

• US 6,863,672 B2
• Filed: 07/30/2002
• Issued: 03/08/2005
• Est. Priority Date: 04/06/1998
• Status: Expired due to Term

• Current Assignee: Orthophoenix, LLC (Marathon Patent Group, Inc.)
• Original Assignee: Kyphon Incorporated (Medtronic Plc)
• Inventors: Reiley, Mark A, Scholten, Arie
• Primary Examiner(s): Robert, Eduardo C.
• Assistant Examiner(s): COMSTOCK, DAVID C
• Application Number:
  US10/208,391
• Publication Number:
  US 20020188299A1
• Time in Patent Office: 952 Days
• Field of Search: 606/79, 606/80, 606/81, 606/84, 606/85, 606/45, 606/46, 606/82, 606/83
• US Class Current: 606/79
• CPC Class Codes: A61B 17/1617 with mobile or detachable parts
• CPC Class Codes: A61B 17/164 intramedullary
• CPC Class Codes: A61B 17/1644 using fluid other than turbine drive fluid
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 17/22012 in direct contact with, or very close to, the obstruction or concrement for removing obstructions in blood vessels by laser A61B18/245
• CPC Class Codes: A61B 17/320016 Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes A61B10/0233, A61B17/29, A61B17/3207 take precedence
• CPC Class Codes: A61B 17/32056 Surgical snare instruments for removing or smashing calculi A61B2017/2212; tonsillotomes A61B17/26
• CPC Class Codes: A61B 17/320758 with a rotating cutting instrument, e.g. motor driven A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002
• 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 18/24 with a catheter A61B18/26, A61B18/28 take precedence
• CPC Class Codes: A61B 2017/00261 Discectomy
• CPC Class Codes: A61B 2017/22014 the ultrasound transducer being outside patient's body; with an ultrasound transmission member; with a wave guide; with a vibrated guide wire not applied in A61B17/22012
• CPC Class Codes: A61B 2017/320008 Scrapers
• CPC Class Codes: A61B 2017/320733 with a flexible cutting or scraping element, e.g. with a whip-like distal filament member
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61B 2217/007 with irrigation system
• CPC Class Codes: A61B 50/30 Containers specially adapted for packaging, protecting, dispensing, collecting or disposing of surgical or diagnostic appliances or instruments for wound clamps A61B17/10; for ligaturing clips A61B17/122; packages or dispensers for surgical gloves or finger-stalls A61B42/40
• CPC Class Codes: A61F 2/44 for the spine, e.g. vertebrae, spinal discs
• 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 2002/30583 : filled with hardenable fluid, e.g. curable in-situ
• CPC Class Codes: A61F 2002/30677 : Means for introducing or releasing pharmaceutical products, e.g. antibiotics, into the body
• CPC Class Codes: A61F 2210/0085 : hardenable in situ, e.g. epoxy resins

Abstract

Tools carry structures that are deployed inside bone and, when manipulated, cut cancellous bone to form a cavity.

Claims

1. A method for creating a cavity in cancellous bone comprising

providing a cannula having an axis that establishes a percutaneous path leading into bone,

providing a shaft having an axis and a distal end portion adapted to be deployed inside the bone through the cannula, said distal end portion having a cavity forming structure comprising a surface which directly contacts cancellous bone in response to linear movement of the shaft along the axis of the cannula,

deploying the cannula percutaneously to establish a path leading to inside bone,

introducing the shaft by movement within and along the axis of the cannula to deploy the cavity forming structure inside the cancellous bone,

moving the shaft linearly along, and not rotatingly about the axis of the cannula to cause the surface to form a cavity in the cancellous bone.

2. A method according to claim 1, further including the step of

filling the cavity with a filing material.

3. A method according to claim 1

wherein the cavity forming structure is adapted to be deployed at an axis that transverses the axis of the shaft.

4. A method according to claim 1, further including

extending the cavity forming structure, in situ radially from the shaft.

5. A method according to claim 1

wherein the surface carries at least one marker to aid visualizing the cavity forming structure inside bone, further including

observing the marker to visualize the cavity forming structure inside bone.

6. A method for treating bone comprising

providing a cannula having a distal end and an axis that establishes a percutaneous path leading into the bone,

providing a shaft having an axis and adapted to be deployed inside bone through the cannula including a cavity forming structure carried by the shaft adapted to extend beyond the distal end of the cannula and comprising a surface which directly contacts cancellous bone in response to linear movement of the shaft along the axis of the cannula,

deploying the cannula percutaneously to establish a path leading to inside bone,

introducing the shaft by movement within and along the axis of the cannula to deploy the cavity forming structure inside bone, and

moving the shaft linearly along, and not rotatingly about the axis of the cannula to cause the surface to contact cancellous bone to form a cavity.

7. A method according to claim 6, further including

filling the cavity with a material.

8. A method according to claim 6

wherein the cavity forming structure is adapted to be deployed at an axis that transverses the axis of the shaft.

9. A method according to claim 6, further including

extending the cavity forming structure, in situ radially from the shaft.

10. A method according to claim 6

wherein the surface carries at least one marker to aid visualizing the cavity forming structure inside bone, further including

observing the marker to visualize the cavity forming structure inside bone.

11. A method for, treating a vertebral body by creating a cavity, wholly within the vertebral body in cancellous bone comprising

providing a cannula having an axis that establishes a percutaneous path leading into bone,

providing a shaft having an axis and a distal end portion adapted to be deployed inside the bone through the cannula, said distal end portion having a cavity forming structure adapted to be extended in situ radially from the shaft and comprising a surface which directly contacts cancellous bone in response to linear movement of the shaft along the axis of the cannula,

deploying the cannula percutaneously to establish a path leading to inside bone,

introducing the shaft by movement within and along the axis of the cannula to deploy the cavity forming structure inside the cancellous bone, extending the cavity forming structure in situ radially from the shaft, and

moving the shaft linearly along the axis of the cannula to cause the surface to form a cavity, wholly within the vertebral body in the cancellous bone.

12. A method according to claim 11, further including

filling the cavity with a filling material.

13. A method according to claim 11

wherein the cavity forming structure is adapted to be deployed at an axis that transverses the axis of the shaft.

14. A method according to claim 11

wherein the surface carries at least one marker to aid visualizing the cavity forming structure inside bone, further including

observing the marker to visualize the cavity forming structure inside bone.

15. A method for treating a vertebral body by creating a cavity wholly within the vertebral body comprising

providing a cannula having a distal end and an axis that establishes a percutaneous path leading into the bone,

providing a shaft having an axis and adapted to be deployed inside bone through the cannula including a cavity forming structure carried by the shaft adapted to extend beyond the distal end of the cannula and be extended in situ radially from the shaft and comprising a surface which directly contacts cancellous bone in response to linear movement of the shaft along the axis of the cannula,

deploying the cannula percutaneously to establish a path leading to inside bone,

introducing the shaft by movement within and along the axis of the cannula to deploy the cavity forming structure inside cancellous bone, extending the cavity forming structure in situ radially from the shaft, and

moving the shaft linearly along the axis of the cannula to cause the surface to contact cancellous bone to from a cavity wholly within the vertebral body in the cancellous bone.

16. A method according to claim 15, further including

filling the cavity with a material.

17. A method according to claim 15

wherein the cavity forming structure is adapted to be deployed at an axis that transverses the axis of the shaft.

18. A method according to claim 15

wherein the surface carries at least one marker to aid visualizing the cavity forming structure inside bone, further including

observing the marker to visualize the cavity forming structure inside bone.

19. A method for treating a vertebral body by creating a cavity wholly inside the vertebral body in cancellous bone comprising

providing a cannula having an axis that establishes a percutaneous path leading into bone,

providing a shaft having an axis and a distal end portion adapted to be deployed inside the bone through the cannula, said distal end portion having a cavity forming structure adapted to be extended in situ radially from the shaft and comprising a surface which directly contacts the cancellous bone in response to movement of the shaft,

deploying the cannula percutaneously to establish a path leading to inside bone,

introducing the shaft by movement within and along the axis of the cannula to deploy the cavity forming structure inside the cancellous bone, extending the cavity forming structure in situ radially from the shaft, and

moving the shaft to cause the surface to form a cavity wholly within the vertebral body in the cancellous bone.

20. A method according to claim 19, further including

filling the cavity with a filling material.

21. A method according to claim 19

wherein the cavity forming structure is adapted to be deployed at an axis that transverses the axis of the shaft.

22. A method according to claim 19

wherein the surface carries at least one marker to aid visualizing the cavity forming structure inside bone, further including

observing the marker to visualize the cavity forming structure inside bone.

23. A method for treating a vertebral body by creating a cavity wholly within the vertebral body in cancellous bone comprising

providing a cannula having a distal end an axis that establishes a percutaneous path leading into bone,

providing a shaft having an axis and adapted to be deployed inside bone through the cannula including a cavity forming structure carried by the shaft adapted to extend beyond the distal end of the cannula and, be extended in situ radially from the shaft and comprising a surface which directly contacts the cancellous bone in response to movement of the shaft,

deploying the cannula percutaneously to establish a path leading to inside bone,

introducing the shaft by movement within and along the axis of the cannula to deploy the cavity forming structure inside the cancellous bone, extending the cavity forming structure in situ radially from the shaft, and

moving the shaft to cause the surface to contact cancellous bone to form a cavity wholly within the vertebral body in the cancellous bone.

24. A method according to claim 23, further including

filling the cavity with a material.

25. A method according to claim 23

wherein the cavity forming structure is adapted to be deployed at an axis that transverses the axis of the shaft.

26. A method according to claim 23

wherein the surface carries at least one marker to aid visualizing the cavity forming structure inside bone, further including

observing the marker to visualize the cavity forming structure inside bone.