Anchorless non-invasive force dissipation system for orthopedic instrumentation

• US 20080015639A1
• Filed: 01/19/2007
• Published: 01/17/2008
• Est. Priority Date: 01/19/2006
• Status: Abandoned Application

• Current Assignee: Spineology Incorporated
• Original Assignee: Spineology Incorporated
• Inventors: Bjork, Todd, McPhillips, Dan
• Application Number:
  US11/655,730
• Publication Number:
  US 20080015639A1
• Time in Patent Office: Days
• US Class Current: 606/240
• CPC Class Codes: A61B 17/17 Guides or aligning means for drills , mills, pins or wires
• CPC Class Codes: A61B 2017/3407 including a base for support on the body
• CPC Class Codes: A61B 90/11 with guides for needles or instruments, e.g. arcuate slides or ball joints

Abstract

An anchorless non-invasive force dissipation device for orthopedic instrumentation including a base having a patient contacting surface, the patient contacting surface including a surface area adapted for external placement on a patient'"'"'s body, and an instrument alignment mechanism operably connected to and selectively positionable relative to the base, the instrument alignment mechanism adapted to interface with at least one orthopedic instrument, such that forces applied by the orthopedic instrument are dissipated across the surface area of the base with the device being unanchored externally of the patient.

Claims

1. An anchorless non-invasive force dissipation device for orthopedic instrumentation comprising:

a base having a patient contacting surface, the patient contacting surface including a surface area adapted for external placement on a patient'"'"'s body such that applied forces are dissipated across the surface area, and

an instrument alignment mechanism operably connected to the base and selectively positionable in at least 2 degrees of freedom relative to the base.

2. The device of claim 1, wherein the device is unanchored externally of the patient.

3. The device of claim 1, wherein the instrument alignment mechanism includes a sheath, a structure defined by a lumen, having a proximal end and a distal end, the distal end including a depth stop, the sheath being positionable in at least 2 degrees of freedom on the base and a working cannula slidably received through the lumen.

4. The device of claim 3, wherein the length of the depth stop is adjustable.

5. The device of claim 4, wherein the depth stop includes adjustable heads to adjust the length of the depth stop.

6. The device of claim 1, wherein the instrument alignment mechanism is positioned on the base using a ball joint.

7. The device of claim 1, wherein the dissipated applied forces may be up to 20,000 psi.

8. The device of claim 1, wherein a thickness of the base is in the range of one-quarter inch to one and one-half inch.

9. The device of claim 1, wherein the surface area of the base is in the range of four square inches to 20 square inches.

10. The device of claim 1 wherein the instrument alignment mechanism further includes means for locking the at least two degrees of freedom once a desired position is achieved.

11. A medical device for dissipating force comprising:

a base having a patient contacting surface, the patient contacting surface including a surface area adapted for placement on a patient'"'"'s body such that applied forces are dissipated across the surface area,

a sheath having a proximal end and a distal end, the distal end including a depth stop, the sheath being positionable in at least 2 degrees of freedom relative to the base, and

a working cannula slidably received through the depth stop.

12. The device of claim 11, wherein the length of the depth stop is adjustable.

13. The device of claim 12, wherein the depth stop includes adjustable heads to adjust the length of the depth stop.

14. The device of claim 11, wherein the depth stop is positioned on the base using a ball joint.

15. A method for dissipating force applied to a patient comprising the steps of:

placing a base having a patient contact surface area onto the patient such that applied forces are dissipated across the surface area,

positioning a sheath relative to the base, and

sliding a working cannula through the sheath and into the surgical site.

16. The method of claim 15 further including the step of locking the sheath and the working cannula into position establishing a repeatable trajectory for the insertion of the surgical instruments.

17. A method for dissipating force applied to a patient comprising the steps of:

placing a base having a patient contacting surface area on a patient,

positioning an instrument alignment mechanism relative to the base,

positioning at least one orthopedic instrument to interface with the instrument alignment mechanism,

applying force with orthopedic instruments, such that forces applied by the orthopedic instrument are dissipated across the surface area of the base.

18. A method for establishing an insertion pathway in a patient for surgical instruments comprising the steps of:

placing a base having a patient contact surface area onto the patient such that applied forces are dissipated across the surface area,

inserting an instrument alignment mechanism onto the base, and

locking the instrument alignment mechanism into a position establishing a repeatable trajectory for the insertion of surgical instruments.

19. The method of claim 18 wherein the working cannula includes a proximal end and a distal end and wherein the cannula is inserted through the patient'"'"'s soft tissue and the distal end is anchored in bone to preserve the insertion pathway.

20. A medical device for dissipating force comprising:

means for contacting a patient surface and dissipating applied forces over the patient surface, and

means for aligning instruments selectively positionable in at least 2 degrees of freedom with respect to the means for contacting.

21. A medical device for dissipating force comprising:

a plurality of bases, each of the plurality of bases having a patient contacting surface, the patient contacting surface including a surface area adapted for placement on a patient'"'"'s body such that applied forces are dissipated across the surface areas of the plurality of bases;

each of the plurality of bases having an instrument alignment mechanism positionable in at least 2 degrees of freedom thereon;

each of the instrument alignment mechanisms being operably connected to each of the other instrument alignment mechanisms at a juncture outside a perimeter of the plurality of bases.

22. A method for aligning surgical instruments comprising the steps of:

providing a base having a patient contact surface area,

providing an instrument alignment mechanism, and

providing instructions for using the base and instrument alignment mechanism

including;

placing the base on the patient surface,

positioning the instrument alignment mechanism on the base, and

locking the instrument alignment mechanism into position establishing a repeatable trajectory for the insertion of surgical instruments.

23. The method of claim 22 further including the step of positioning at least one orthopedic instrument to interface with the instrument alignment mechanism.

24. The method of claim 23 further including they step of applying force with orthopedic instruments, such that forces applied by the orthopedic instrument are dissipated across the surface area of the base.