Spine fixation device and method

• US 6,582,433 B2
• Filed: 04/09/2001
• Issued: 06/24/2003
• Est. Priority Date: 04/09/2001
• Status: Expired due to Fees

• Current Assignee: Kyphon SARL (Medtronic Plc)
• Original Assignee: St. Francis Medical Technologies, Inc. (Medtronic Plc)
• Inventors: Yun, David
• Primary Examiner(s): Shaver, Kevin
• Assistant Examiner(s): Priddy, Michael B.
• Application Number:
  US09/829,321
• Publication Number:
  US 20020147449A1
• Time in Patent Office: 806 Days
• Field of Search: 606/61, 623/17.11, 623/17-2-
• US Class Current: 606/249
• 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

Abstract

The present invention is a device and method that immobilizes the vertebral bodies by immobilizing the respective spinous process extending therefrom. The device contains a spacer extending from a body with the spacer adapted to be positioned between adjacent spinous processes so that the spacer may be located close to the spine. A strap connected with the body is designed to engage the spinous processes, such that the device may be adjusted to be positioned about the spinous processes. The device ensures that the spacer remains positioned between adjacent spinous processes. The method to insert the device minimizes destruction to body tissue, thus it is less traumatic to the patient and allows for the patient to recover from the procedure faster than conventional methods.

Claims

1. A device that immobilizes vertebral bodies by immobilizing respective spinous processes extending therefrom, comprising:

a spacer adapted to be positioned between adjacent spinous processes;

a body connected with the spacer such that the position of the spacer can be adjusted relative to the body; and

a strap connected with the body and adapted to engage the adjacent spinous processes.

2. The device according to claim 1, whereby the spacer is substantially elliptical in shape.

3. The device according to claim 2, whereby the spacer is adapted to be positioned close to the spine and adjacent to portions of the spinous processes to spread the load placed upon the spacer by the adjacent spinous processes.

4. The device according to claim 1, whereby the spacer is substantially cylindrical in shape.

5. The device according to claim 4, whereby the spacer is adapted to be positioned close to the spine and adjacent to portions of the spinous processes to spread the load placed upon the spacer by the adjacent spinous processes.

6. The device according to claim 1, whereby the strap has a securing end and an interlocking end that attach with the body.

7. The device according to claim 6, whereby the spacer is connected with a first end of the body, and whereby the body has a second end for engaging the securing end of the strap, and a third end for engaging the interlocking end of the strap.

8. The device according to claim 7, whereby the third end of the body has at least one receiving hole capable of accepting the interlocking end of the strap and forming a secure connection when the interlocking end of the strap is inserted into the receiving hole.

9. The device according to claim 7, whereby the third end of the body has at least one interlocking finger capable of accepting the interlocking end of the strap and forming a secure connection when the interlocking end of the strap is attached with the interlocking finger.

10. The device according to claim 9, whereby the third end of the body and the interlocking end of the strap also have a hole extending therethrough so that when the interlocking end of the strap and the third end of the body are secured, the holes align allowing for a fastening device to be inserted, thus providing additional securing.

11. The device according to claim 7, whereby the third end of the body contains a locking ring assembly capable of accepting the interlocking end of the strap and forming a secure connection when the interlocking end of the strap is inserted into the locking ring assembly.

12. The device according to claim 7, whereby the third end of the body contains a moveable locking device capable of accepting the interlocking end of the strap and forming a secure connection when the interlocking end of the strap is inserted into the moveable locking device.

13. The device according to claim 1, whereby the body has a first end that supports a pin extending substantially perpendicular from the first end of the body so that the pin can support the spacer in relation to the body.

14. The device according to claim 13, whereby the spacer is movably attached to the body so that the spacer can adjust to the contours of the spinous processes as the spacer moves closer to the spine.

15. The device according to claim 1, whereby the strap has biologically acceptable material placed on a portion thereof so that the material contacts the spinous process when the strap is secured to the spinous process, thus preventing any sharp edges of the strap from cutting into the spinous process.

16. The device according to claim 1, whereby the spacer is adapted to be located close to the spine.

17. The device according to claim 1, whereby the device may be adjusted so that the strap is positioned about the adjacent spinous processes, ensuring that the spacer remains positioned between adjacent spinous processes.

18. The device according to claim 1, whereby the strap maintains constant tension on the spinous process.

19. A method for rigidly positioning adjacent spinous processes, including the steps, in any order, of:

placing a spacer connected with a body between adjacent spinous processes by inserting the spacer between the spinous processes;

adjusting the position of the spacer relative to the body;

positioning a strap connected with the body around adjacent spinous processes; and

securing the strap to the body.

20. The method according to claim 19, whereby an interlocking end of the strap engages at least one receiving member of the body, and the additional step of causing the interlocking end of the strap and the receiving member of the body to interlock together so that the strap is fastened to adjacent spinous processes.

21. The method of claim 20, whereby securing the strap to the body includes fastening the interlocking end of the strap with the receiving member of the body by placing an interlocking finger of the interlocking end of the strap into the receiving member of the body so that the strap is held in place.

22. The method of claim 21, whereby securing the strap to the body further includes placing a fastener through holes that align between the interlocking end of the strap and the receiving member of the body.

23. The method of claim 20, whereby securing the strap to the body includes engaging the interlocking end of the strap with a receiving member of the body by placing a ball at the end of the interlocking end of the strap into a ring assembly of the body so that the strap is held in place.

24. The method of claim 20, whereby securing the strap to the body includes engaging the interlocking end of the strap with a receiving member of the body by placing the ball at the end of the interlocking end of the strap into a moveable locking device of the body, and by further fastening a fastening device through the moveable locking device.

25. The method according to claim 19, whereby the spacer placed between adjacent spinous processes is elliptical in shape with a narrow end, wherein the step of placing the spacer between adjacent spinous processes includes positioning the narrower end of the spacer closer to the spine.

26. The method according to claim 19, including the step of positioning the strap around the adjacent spinous processes such that a biologically acceptable material covering a portion of the strap is in contact with the adjacent spinous processes, thus avoiding any sharp edges of the strap from contacting the adjacent spinous processes.

27. The method according to claim 26, whereby the step of positioning the strap around the adjacent spinous processes does not require altering the adjacent spinous processes to secure the strap around the adjacent spinous processes.

28. A method for rigidly positioning adjacent spinous processes, including the steps, in any order, of:

placing a spacer by a body between adjacent spinous processes by inserting the spacer between the spinous processes

positioning a strap secured to the body around adjacent spinous processes;

securing the strap to the body; and

whereby an interlocking end of the strap engages at least one receiving member of the body, and the additional step of causing the interlocking end of the strap and the receiving member of the body to interlock together so that the strap is fastened to adjacent spinous processes; and

whereby securing the strap to the body includes engaging the interlocking end of the strap with a receiving member of the body by placing a ball at the end of the interlocking end of the strap into at least one of a plurality of receiving holes of the body so that the strap is held in place.

29. A method for rigidly positioning adjacent spinous processes, including the steps, in any order, of:

placing a spacer supported by a body between adjacent spinous processes by inserting the spacer between the spinous processes from one side of the spinous processes, thus injuring less body material and allowing the patient to recover faster;

adjusting the position of the spacer relative to the body;

positioning a strap connected with the body around adjacent spinous processes; and

securing the strap to the body.

30. The method according to claim 29, whereby an interlocking end of the strap engages at least one receiving member of the body, and the additional step of causing the interlocking end of the strap and the receiving member of the body to interlock together so that the strap is fastened to the adjacent spinous processes.

31. The method according to claim 29, whereby the spacer placed between two adjacent spinous processes is elliptical in shape with a narrow end, wherein placing the spacer includes positioning the narrower end of the spacer closer to the spine.

32. The method according to claim 29, including positioning the strap around the adjacent spinous processes such that a biologically acceptable material covering a portion of the strap is in contact with the adjacent spinous processes prevents any edges of the strap from contacting the adjacent spinous processes.

33. The method according to claim 29, whereby the step of positioning the strap around the adjacent spinous processes does not require altering the adjacent spinous processes to secure the strap around the adjacent spinous processes.

34. The method of claim 29, whereby the securing step includes securing the strap to the body by engaging an interlocking end of the strap with a receiving member of the body by placing an interlocking finger of the interlocking end of the strap into at least one of the interlocking fingers of the body so that the strap is held in place.

35. The method of claim 34, whereby the securing step further includes placing a fastener through holes that align between the interlocking member of the strap and the receiving member of the body.

36. The method of claim 29, whereby the securing step includes fastening the strap to the body by engaging the interlocking end of the strap with the receiving member of the body by placing a ball at the end of an interlocking end interlocking end of the strap into a ring assembly of the body so that the strap is held in place.

37. The method of claim 29, whereby the securing step includes fastening the strap to the body by engaging the interlocking end of the strap with the receiving member of the body by placing a ball at the end of the interlocking end of the strap into a moveable locking device of the body, and by further fastening a fastening device through the moveable locking device.

38. A method for rigidly positioning adjacent spinous processes, including the steps, in any order, of:

placing a spacer supported by a body between adjacent spinous processes by inserting the spacer between the spinous processes from one side of the spinous processes, thus injuring less body material and allowing the patient to recover faster;

positioning a strap secured to the body around adjacent spinous processes;

securing the strap to the body; and

whereby the securing step includes securing the strap to the body by engaging an interlocking end of the strap with a receiving member of the body by placing a ball at the end of the interlocking end of the strap into at least one of a plurality of receiving holes of the body so that the strap is held in place.

39. A device that immobilizes vertebral bodies by immobilizing respective spinous processes extending therefrom, comprising:

a spacer that is adapted to be placed between the spinous processes;

a strap that is adapted to be placed about the spinous processes; and

a body that couples the spacer to the strap with the spacer offset from the strap along a sagittal plane so that the spacer can be placed closer to a spine than the strap.

40. The device according to claim 39, wherein the spacer is cylindrical in shape.

41. The device according to claim 39, wherein the spacer is elliptical in shape.

42. The device according to claim 39, wherein the spacer is egg-shaped in shape.

43. The device according to claim 39, wherein the strap is at least in part flexible.

44. The device according to claim 39, wherein the strap is at least in part elastic.

45. The device according to claim 39, wherein the strap is at least in part elongateable.

46. A device that immobilizes vertebral bodies by immobilizing respective spinous processes extending therefrom, comprising:

a spacer that is adapted to be placed between the spinous processes;

a strap that is adapted to be placed about the spinous processes;

a body that couples the spacer to the strap with the spacer offset from the strap so that the spacer can be placed closer to a spine than the strap; and

wherein the spacer is rotatably mounted to the body.

47. A device that immobilizes vertebral bodies by immobilizing respective spinous processes extending therefrom, comprising:

a spacer that is adapted to be placed between the spinous processes;

a strap that is adapted to be placed about the spinous processes;

a body that couples the spacer to the strap with the spacer offset from the strap so that the spacer can be placed closer to a spine than the strap; and

wherein the body includes a member extending therefrom, with the spacer rotatably mounted to the member.

48. The device according to claim 47, wherein the strap defines a plane and the member is spaced from the plane and is parallel to the plane.

49. A device that immobilizes vertebral bodies by immobilizing respective spinous processes extending therefrom, comprising:

a spacer that is adapted to be placed between the spinous processes;

a strap that is adapted to be placed about the spinous processes;

a body that couples the spacer to the strap with the spacer offset from the strap so that the spacer can be placed closer to a spine than the strap; and

wherein the strap has a fastener that tightens the strap.

50. A device that immobilizes vertebral bodies by immobilizing respective spinous processes extending therefrom, comprising:

a spacer that is adapted to be placed between the spinous processes;

a strap that is adapted to be placed about the spinous processes;

a body that couples the spacer to the strap; and

wherein the spacer is rotatably mounted to the body.

51. A device that immobilizes vertebral bodies by immobilizing respective spinous processes extending therefrom, comprising:

a spacer that is adapted to be placed between the spinous processes;

a strap that is adapted to be placed about the spinous processes, said strap defining a plane;

a body that couples the spacer to the strap; and

wherein the body includes a member extending therefrom, with the spacer rotatably mounted to the member.

52. A device that immobilizes vertebral bodies by immobilizing respective spinous processes extending therefrom, comprising:

a spacer that is adapted to be placed between the spinous processes;

a strap that is adapted to be placed about the spinous processes, said strap defining a plane;

a body that couples the spacer to the strap with the spacer offset from the strap so that the spacer can be placed closer to a spine than the strap; and

wherein the spacer has an axis that is parallel to the plane defined by the strap.