Systems and methods for providing cavities in interior body regions

• US 20060184192A1
• Filed: 02/11/2005
• Published: 08/17/2006
• Est. Priority Date: 02/11/2005
• Status: Abandoned Application

• Current Assignee: Kyphon SARL (Medtronic Plc)
• Original Assignee: Kyphon SARL (Medtronic Plc)
• Inventors: Way, Bryce Anton, Markworth, Aaron D.
• Application Number:
  US11/056,785
• Publication Number:
  US 20060184192A1
• Time in Patent Office: Days
• US Class Current: 606/198
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/1617 with mobile or detachable parts
• CPC Class Codes: A61B 17/1659 Surgical rasps, files, planes, or scrapers
• CPC Class Codes: A61B 17/1675 for the knee
• CPC Class Codes: A61B 17/7098 wherein the implant is permeable or has openings, e.g. fenestrated screw hollow surgical screws A61B17/864
• 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 17/8811 characterised by the introducer tip, i.e. the part inserted into or onto the bone
• CPC Class Codes: A61B 17/8855 inflatable, e.g. kyphoplasty balloons
• CPC Class Codes: A61B 17/8858 laterally or radially expansible inflatable A61B17/8855
• CPC Class Codes: A61B 2017/00557 inflatable A61B2017/22051 takes precedence
• CPC Class Codes: A61B 2090/061 for measuring dimensions, e.g. length
• CPC Class Codes: A61B 90/06 Measuring instruments not otherwise provided for
• CPC Class Codes: A61F 2/30721 Accessories
• CPC Class Codes: A61F 2/3872 Meniscus for implantation between the natural bone surfaces
• CPC Class Codes: A61F 2/4603 for insertion or extraction of endoprosthetic joints or of accessories thereof
• CPC Class Codes: A61F 2/4657 Measuring instruments used for implanting artificial joints for surgical instruments A61B90/06
• CPC Class Codes: A61F 2/4684 Trial or dummy prostheses
• CPC Class Codes: A61F 2002/30133 kidney-shaped or bean-shaped
• CPC Class Codes: A61F 2002/30616 Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/30708 Means for distinguishing between left-sided and right-sided devices, Sets comprising both left-sided and right-sided prosthetic parts
• CPC Class Codes: A61F 2002/3071 : Identification means; Administration of patients
• CPC Class Codes: A61F 2002/30754 : Implants for interposition between two natural articular surfaces
• CPC Class Codes: A61F 2002/3895 : unicompartimental
• CPC Class Codes: A61F 2002/4635 : using minimally invasive surgery
• CPC Class Codes: A61F 2002/4658 : for measuring dimensions, e.g. length
• CPC Class Codes: A61F 2002/4661 : for measuring thickness
• CPC Class Codes: A61F 2002/4662 : for measuring penetration depth
• CPC Class Codes: A61F 2230/0015 : Kidney-shaped, e.g. bean-shaped
• CPC Class Codes: A61F 2250/0084 : Means for distinguishing between left-sided and right-sided devices; Sets comprising both left-sided and right-sided prosthetic parts
• CPC Class Codes: A61F 2250/0087 : colour-coded
• CPC Class Codes: A61F 2250/0089 : coded with symbols, e.g. dots, numbers, letters, words

Abstract

Systems and methods for providing a cavity in an interior body region are described. In one described method, a shaft comprising an expansible portion configured to expand once beyond a distal end of a first cannula is inserted through the first cannula. The expansible portion is then expanded, thereby creating a cavity. While the expansible portion is expanded, a bone cement may be inserted into the cavity. The expansible portion may then be collapsed, and the shaft removed through the first cannula.

Claims

1. A system comprising:

a cannula comprising a proximal end, a distal end, an interior bore dimension, and an axis establishing a path; and

a shaft adapted to be deployed adjacent a tissue by movement within and along the axis of the cannula,

the shaft comprising a proximal portion, a distal portion, and an expansible portion disposed between the proximal and distal portions, wherein the expansible portion is constrained from expanding beyond an expanded dimension by the proximal and distal portions.

2. The system of claim 1, wherein the expansible portion is configured to maintain a dimension of a cavity adjacent the tissue while the cavity is filled with a bone cement.

3. The system of claim 1, wherein the expanded dimension is at least the interior bore dimension, and the expansible portion comprises an unexpanded dimension less than the interior bore dimension.

4. The system of claim 3, wherein the expansible portion is configured to be contracted from the expanded dimension to the unexpanded dimension when the expansible portion is brought within the distal end of the cannula from a point beyond the distal end of the cannula.

5. The system of claim 3, wherein the expansible portion is configured to be expanded from the unexpanded dimension to the expanded dimension when the expansible portion is extended to a point beyond the distal end of the cannula.

6. The system of claim 1, wherein the proximal portion of the shaft comprises a cross section substantially similar to a cross section of the distal portion of the shaft.

7. The system of claim 6, wherein the cross sections of the proximal and distal portions both comprise a polygonal shape, and wherein the expansible portion is provided by removing at least one corner of the polygonal shape.

8. The system of claim 1, wherein the expansible portion comprises at least one outwardly expanding beam, wherein the at least one outwardly expanding beam comprises a proximal end coupled to the proximal portion of the shaft, and a distal end coupled to the distal portion of the shaft.

9. The system of claim 1, wherein the expansible portion comprises a surface configured to directly contact and shear the tissue.

10. The system of claim 9, wherein the surface comprises a beveled edge surface.

11. The system of claim 1, wherein the shaft comprises a bore extending therethrough along the axis of the cannula.

12. The system of claim 11, wherein the bore is configured to receive a scope.

13. The system of claim 11, wherein the bore is configured to receive an uninflated balloon.

14. The system of claim 11, wherein the expansible portion is configured to be expanded when the uninflated balloon is inflated.

15. The system of claim 1, wherein at least the expansible portion of the shaft comprises a shape memory material.

16. A method comprising:

inserting a shaft comprising an expansible portion through a cannula, wherein the expansible portion is configured to expand once beyond a distal end of the cannula;

expanding the expansible portion, thereby creating a cavity;

inserting a bone cement into the cavity while the expansible portion is expanded;

collapsing the expansible portion; and

removing the shaft through the cannula.

17. The method of claim 16, wherein expanding the expansible portion comprises:

inserting an uninflated balloon through a bore in the shaft to a point within the expansible portion, wherein the balloon is configured to expand the expansible portion when the balloon is inflated; and

inflating the balloon.

18. The method of claim 17, further comprising:

deflating the balloon; and

removing the balloon through the bore in the shaft.

19. The method of claim 16, wherein the expansible portion comprises a surface configured to directly contact and shear tissue adjacent to the cavity, and further comprising:

contacting the tissue with the surface.

20. The method of claim 19, wherein the surface comprises a beveled edge surface.

21. The method of claim 16, wherein the cannula comprises a first cannula, and wherein inserting the bone cement into the cavity comprises inserting the bone cement through a second cannula.

22. The method of claim 21, wherein the second cannula comprises a contralateral cannula.

23. The method of claim 16, wherein the cavity is adjacent a tissue.

24. The method of claim 16, wherein the expansible portion is disposed between a proximal portion of the shaft and a distal portion of the shaft, and wherein the expansible portion is constrained from expanding beyond an expanded dimension by the proximal and distal portions.

25. The method of claim 24, wherein a cross section of the proximal portion of the shaft is substantially similar to a cross section of the distal portion of the shaft.