Medical device systems for the spine

• US 20060085073A1
• Filed: 10/18/2004
• Published: 04/20/2006
• Est. Priority Date: 10/18/2004
• Status: Abandoned Application

• Current Assignee: Kamshad Raiszadeh
• Original Assignee: Kamshad Raiszadeh
• Inventors: Raiszadeh, Kamshad
• Application Number:
  US10/967,417
• Publication Number:
  US 20060085073A1
• Time in Patent Office: Days
• US Class Current: 623/17.120
• CPC Class Codes: A61B 17/7001 Screws or hooks combined with longitudinal elements which do not contact vertebrae A61B17/7058 takes precedence
• CPC Class Codes: A61B 17/7007 Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit around the screw or hook heads
• CPC Class Codes: A61B 17/7062 Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs rib fixation devices A61B17/8076; Tools for such devices
• CPC Class Codes: A61F 2/4405 for apophyseal or facet joints, i.e. between adjacent spinous or transverse processes devices implanted between spinous or transverse processes A61B17/7062
• CPC Class Codes: A61F 2/441 made of inflatable pockets or chambers filled with fluid, e.g. with hydrogel
• CPC Class Codes: A61F 2/442 Intervertebral or spinal discs, e.g. resilient non-disc-shaped intervertebral inflatable pockets A61F2/441; non-disc-shaped intervertebral fusion implants A61F2/4455
• CPC Class Codes: A61F 2/4455 for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages intervertebral discs A61F2/442
• CPC Class Codes: A61F 2002/3008 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61F 2002/30537 adjustable
• CPC Class Codes: A61F 2002/30581 having a pocket filled with fluid, e.g. liquid
• CPC Class Codes: A61F 2002/30586 having two or more inflatable pockets or chambers
• CPC Class Codes: A61F 2002/30971 Laminates, i.e. layered products
• CPC Class Codes: A61F 2002/444 for replacing the nucleus pulposus
• CPC Class Codes: A61F 2002/448 comprising multiple adjacent spinal implants within the same intervertebral space or within the same vertebra, e.g. comprising two adjacent spinal implants
• CPC Class Codes: A61F 2002/467 for measuring fluid pressure
• CPC Class Codes: A61F 2250/0004 adjustable
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers

Abstract

Medical device systems for treating a spine and related methods are described. In some embodiments, a medical device system includes an expandable intradiscal portion configured to be placed between two vertebras, and an expandable first extradiscal portion capable of being in fluid communication with the intradiscal portion.

Claims

1. A medical device system, comprising:

an expandable intradiscal portion configured to be placed between two vertebras; and

an expandable first extradiscal portion capable of being in fluid communication with the intradiscal portion.

2. The medical device system of claim 1, wherein the intradiscal portion is configured to be placed in an intradiscal space between two vertebras.

3. The medical device system of claim 1, further comprising a flexible and elongated first member comprising the intradiscal portion and the first extradiscal portion.

4. The medical device system of claim 2, wherein the first member comprises a polymer.

5. The medical device system of claim 2, further comprising a constraint configured to receive a portion of the first member;

the constraint capable of preventing the portion of the first member from extending.

6. The medical device system of claim 2, wherein the first member comprises an elongated portion defining a lumen in fluid communication with the intradiscal portion and the first extradiscal portion.

7. The medical device system of claim 2, wherein the first member is adapted to be secured to a screw.

8. The medical device of claim 1, further comprising a valve in fluid communication with intradiscal portion and the first extradiscal portion.

9. The medical device system of claim 1, wherein the intradiscal portion comprises a surface configured to contact at least one of the two vertebras.

11. The medical device of claim 9, further comprising a flexible and elongated first member comprising the intradiscal portion and the first and second extradiscal portions, the first member comprising a first elongated portion defining a lumen extending between the intradiscal portion and the first extradiscal portion, and a second elongated portion defining a lumen extending between the intradiscal portion and the second extradiscal portion.

10. A medical device system, comprising:

an expandable intradiscal portion configured to be placed between two vertebras;

an expandable first extradiscal portion capable of being in fluid communication with the intradiscal portion; and

an expandable second extradiscal portion in fluid communication with the intradiscal portion and the first extradiscal portion.

12. The medical device system of claim 10, further comprising at least two constraints configured to receive portions of the first member, the constraints capable of preventing the portions of the first member from extending.

13. A medical device system, comprising:

a flexible first member comprising

an expandable intradiscal portion configured to be placed between two vertebras, and

an expandable first extradiscal portion capable of being in fluid communication with the intradiscal portion; and

a constraint configured to receive a portion of the first member, the constraint capable of preventing the portion of the first member from extending.

14. The medical device system of claim 13, wherein the first member further comprises a valve in fluid communication with the intradiscal portion and the extradiscal portion.

15. The medical device system of claim 13, wherein the first member further comprises an expandable second extradiscal portion in fluid communication with the intradiscal portion and the first extradiscal portion.

16. The medical device of claim 13, wherein the first member comprises a polymer.

17. A medical device system, comprising:

an expandable intradiscal portion configured to be placed between two vertebras and to contact one or more of the two vertebra; and

a valve capable of being in fluid communication with the intradiscal portion, wherein the valve allows for fluid in the medical device system to be adjusted post-operatively when the medical device system is implanted in the body.

18. The medical device system of claim 17, further comprising an extradiscal portion, wherein the extradiscal portion includes a piston, and the extradiscal portion and the intradiscal portion are capable of being in fluid communication with each other.

19. A method, comprising:

providing a medical device system comprising a first expandable portion and a second expandable portion capable of being in fluid communication with the first expandable portion;

positioning the first expandable portion between two vertebras; and

positioning the second expandable portion spaced from the vertebras.

20. The method of claim 19, wherein:

the first expandable portion is positioned in a disc space between two vertebras; and

the second expandable portion is spaced posterior to the disc space.

21. The method of claim 19, wherein the second expandable portion is positioned posterior of the vertebras.

22. The method of claim 19, further comprising securing the second expandable portion to a screw secured to a vertebra.

23. The method of claim 19, wherein the first and second expandable portions are positioned in a body from a posterior approach.

24. The method of claim 19, further comprising removing at least a portion of a disc between the two vertebras.

25. The method of claim 19, further comprising removing at least a portion of a facet joint of at least one of the two vertebras.

26. The method of claim 19, further comprising introducing a fluid into the first expandable portion and the second expandable portion.

27. The method of claim 26, further comprising adjusting the amount of fluid in the medical device system.

28. The method of claim 27, wherein the pressure is adjusted from a posterior approach through a valve in fluid communication with the first and second expandable portions.

29. The method of claim 19, wherein the medical device system comprises a flexible member comprising the first and second expandable portions, and further comprising constraining a portion of the flexible member from extending.

30. The method of claim 19, wherein the medical system further comprises a third expandable portion capable of being in fluid communication with the first and second expandable portions, and further comprising positioning the third expandable portion spaced from the vertebras.

31. The method of claim 30, wherein the third expandable portion is positioned posterior of the vertebras.

32. The method of claim 19, further comprising expanding a test balloon between the vertebras.

33. The method of claim 32, further comprising introducing a fluoroscopically visible agent into the balloon.

34. The method of claim 19, further comprising introducing a bone morphogenic material into the first expandable portion.

35. A method, comprising:

removing at least a portion of a disc in a disc space between two vertebras;

using a posterior approach to position a first expandable portion of a medical device system in the disc space between the two vertebras; and

using a posterior approach to position a second expandable portion of the medical device system posterior to the disc space.

36. The method of claim 35, wherein the disc is removed bilaterally.

37. The method of claim 35, further comprising expanding a test balloon in the disc space after removing a portion of the disc and prior to positioning the first expandable portion of the medical device system.

38. The method of claim 37, further comprising introducing a fluoroscopically visible agent into the balloon.

39. The method of claim 35, further comprising securing at least one screw to at least one of the vertebras.

40. The method of claim 35, further comprising removing at least a portion of a facet joint of at least one of the two vertebras.

41. The method of claim 35, further comprising constraining a portion of the medical device system from extending.

42. The method of claim 35, further comprising securing the second expandable portion to a screw secured to a vertebra.

43. The method of claim 35, further comprising introducing a fluid into the first expandable portion of the second expandable portion.

44. The method of claim 43, further comprising adjusting the amount of the fluid in the medical device system.

45. The method of claim 44, wherein the pressure is adjusted from a posterior approach through a valve in fluid communication with the first and second expandable portions.

46. The method of claim 35, further comprising introducing bone morphogenic material into the first expandable portion.

47. The method of claim 35, further comprising using a posterior approach to position a third expandable portion of the medical device system posterior to the disc space, the third expandable portion capable of being in fluid communication with the first and second expandable portions.

48. The method of claim 35, further comprising using a posterior approach to position a third expandable portion of the medical device system in the disc space between the vertebras, the third expandable portion capable of being in fluid communication with the first and second expandable portions.

49. The method of claim 35, further comprising using a posterior approach to position a third expandable portion of the medical device system in the disc space between the vertebras, and using a posterior approach to position a fourth expandable portion of the medical device system, the third and fourth expandable portions capable of being in fluid communication with each other.

50. The method of claim 35, wherein the first expandable portion contacts an annulus between the two vertebras.