Method and apparatus for distracting a joint, including the provision and use of a novel fluid joint spacer

1. A method comprising:

inserting a fluid joint spacer into the interior of a joint so that the fluid joint spacer sits between two opposing bones of the joint;

passing pressurized fluid into the fluid joint spacer and out at least one opening of the fluid joint spacer so that the emitted fluid provides a bearing between the two opposing bones of the joint while the fluid is being emitted from the fluid joint spacer; and

manipulating the joint.

2. A method according to claim 1 wherein the fluid joint spacer comprises:

a body having means for receiving the pressurized fluid from an external source and emitting the pressurized fluid out at least one opening so as to provide the bearing between the two opposing bones of the joint.

3. A method according to claim 2 wherein the fluid joint spacer further comprises a shaft having a distal end and a proximal end, and further wherein the body is disposed at the distal end of the shaft.

4. A method according to claim 3 wherein pressurized fluid is applied to the proximal end of the shaft, flows through the shaft and is emitted from the body.

5. A method according to claim 3 wherein at least a portion of the shaft is flexible.

6. A method according to claim 5 wherein the shaft is steerable.

7. A method according to claim 3 wherein the shaft is adapted to ride on a guidewire.

8. A method according to claim 3 wherein the proximal end of the shaft comprises a handle.

9. A method according to claim 2 wherein the body comprises a first surface and a second surface, and further wherein the body is configured to emit pressurized fluid from at least one of the first surface and the second surface.

10. A method according to claim 9 wherein the body is configured to emit pressurized fluid from both the first surface and the second surface.

11. A method according to claim 9 wherein at least one of the first surface and the second surface is substantially planar.

12. A method according to claim 9 wherein at least one of the first surface and the second surface is concave.

13. A method according to claim 9 wherein at least one of the first surface and the second surface is convex.

14. A method according to claim 9 wherein the first surface is concave and the second surface is convex.

15. A method according to claim 2 wherein the body comprises an inflatable member.

16. A fluid joint spacer according to claim 2 wherein the body comprises a material selected from the group consisting of a rigid material, a semi-rigid material and a compliant material.

17. A fluid joint spacer according to claim 2 wherein the body comprises at least one concave structure including a base and a rim, and further wherein the rim is more compliant than the base.

18. A fluid joint spacer according to claim 17 wherein the at least one concave structure acts as a skirt to help direct pressurized fluid against adjacent anatomy.

19. A fluid joint spacer according to claim 17 wherein the body comprises two concave structures.

20. A fluid joint spacer according to claim 2 wherein the body is capable of folding along an axis.

21. A method according to claim 2 wherein the body is delivered into the interior of the joint by passing the body through an arthroscopic cannula.

22. A method according to claim 1 wherein manipulating the joint comprises moving at least one of the opposing bones of the joint relative to the other of the opposing bones of the joint.

23. A method according to claim 1 wherein manipulating the joint comprises at least one of flexion and extension, adduction and abduction and internal and external rotation of the two opposing bones of the joint.

24. A method according to claim 1 including the further step of performing a surgical procedure on the joint.

25. A method according to claim 1 wherein the joint is the hip joint.

26. A method according to claim 1 wherein the fluid is saline.

27. A method according to claim 1 wherein the fluid is air.