Supplemental spine fixation device and method

• US 6,652,527 B2
• Filed: 10/18/2001
• Issued: 11/25/2003
• Est. Priority Date: 10/20/1998
• Status: Expired due to Fees

• Current Assignee: Kyphon SARL (Medtronic Plc)
• Original Assignee: St. Francis Medical Technologies, Inc. (Medtronic Plc)
• Inventors: Mitchell, Steve, Klyce, Henry A., Zucherman, James F., Yerby, Scott, Winslow, Charles J., Hsu, Ken Y.
• Primary Examiner(s): Philogene, Pedro
• Application Number:
  US09/982,418
• Publication Number:
  US 20020116000A1
• Time in Patent Office: 768 Days
• Field of Search: 606/61, 606/60, 606/72, 606/70, 606/71, 606/74, 623/17.11, 623/17.16
• US Class Current: 606/249
• CPC Class Codes: A61B 17/66 Alignment, compression or distraction mechanisms
• 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: A61B 17/7071 Implants for expanding or repairing the vertebral arch or wedged between laminae or pedicles; Tools therefor
• CPC Class Codes: A61K 31/37 Coumarins, e.g. psoralen

Abstract

The implant device is a minimally invasive device for assisting in the fusing together of vertebral bodies of the spine. The implant device immobilizes the vertebral bodies by immobilizing the respective spinous process extending from the vertebral body. The implant device has at least one spacer and hook to immobilize adjacent spinous processes. The spacer and hook are fastened to connection rods. Each connection rod can individually traverse through a range of motion, allowing each hook to engage the respective spinous process.

Claims

1. An implant device for rigidly fixing adjacent spinous process, the device comprising:

at least one spacer, wherein the spacer is adapted for urging between spinous process;

a first and a second engagement element, each element adapted to engage a spinous process;

a first and second connection rods;

whereby the first and second connection rods are movably connected with the spacer; and

whereby the first and second engagement members are fastened to the first and second connection rods respectively.

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

3. The device according to claim 1, whereby the spacer is substantially egg-shaped.

4. The device according to claim 1, whereby the first and second engagement elements have a tapered front end adapted for urging the first and second engagement elements between adjacent spinous process.

5. The device according to claim 1, whereby the first and second connection rods pivot about a longitudinal axis of the spacer.

6. The device according to claim 5, whereby the first and second connection rods pivot independently of each other.

7. The device according to claim 1, whereby the engagement elements are fastened to the connection rods so that the engagement elements can be positioned at selected locations along the length of the connection rods.

8. The device according to claim 1, whereby the engagement members can be positioned at an angle relative to the connection rods.

9. The device according to claim 4, whereby the first and second engagement members further each have a hook element that is adapted for engaging the spinous process once the tapered front end has been urged between spinous process.

10. The device according to claim 1, wherein the spacer has a tapered front end.

11. The device of claim 1, wherein at least one of the engagement elements is rotatable.

12. The device of claim 1, wherein the spacer is elliptical in shape.

13. The device of claim 1, wherein the spacer has anatomically compatible contours.

86. The device of claim 1 wherein said engagement elements have a length and a fastener that can fasten said engagement elements to the connection rods, which fastener is located along the length of the engagement elements.

87. The device of claim 1 wherein said engagement elements have a length and a fastener that can fasten said engagement elements to the connection rods, which fastener is located at an angle to the length of the engagement elements.

88. The device of claim 1 wherein said engagement elements have a length and a fastener that can fasten said engagement elements to the connection rods, which fastener is rotated about the axis of the length of the engagement element in order to tighten the engagement elements to the connection rods.

89. The device of claim 1 wherein said engagement elements have a length and a fastener that can fasten said engagement elements to the connection rods, which fastener is rotated at an angle to the axis of the length of the engagement element in order to tighten the engagement elements to the connection rods.

90. The device of claim 1 wherein at least one of the engagement elements is rotatably relative to the connection rods and including a mechanism that limits the rotation of the at least one of the engagement elements.

14. An implant device for rigidly fixing adjacent spinous process, the device comprising:

at least one spacer, wherein the spacer further contains a tapered front end adapted for urging the spacer between adjacent spinous process;

a plurality of engagement elements, each adapted to engage a spinous process;

a plurality of connection rods;

whereby the connection rods are selectively movably connected with the spacer; and

whereby the engagement members are fastened to the connection rods, and further are positionably located along the length of the connection rods.

15. The device according to claim 14, whereby the spacer is substantially circular in shape.

16. The device according to claim 14, whereby the spacer is substantially egg-shaped.

17. The device according to claim 14, whereby the engagement elements further have a tapered front end adapted for urging the engagement elements between adjacent spinous process.

18. The device according to claim 14, whereby the connection rods pivot about the longitudinal axis of the spacer.

19. The device according to claim 18, whereby the connection rods pivot independently of each other.

20. The device according to claim 14, whereby the engagement members can further be positioned at any angle relative to the connection rods.

21. The device according to claim 17, whereby the engagement members further have a hook element that is adapted for engaging the spinous process once the tapered front end has been urged between spinous process.

22. The device according to claim 14, wherein at least one of said engagement elements is rotatable.

23. The device of claim 14, wherein the spacer is elliptical in shape.

24. The device of claim 14, wherein the spacer has anatomically compatible contours.

91. The device of claim 14 wherein said engagement elements have a length and a fastener that can fasten said engagement elements to the connection rods, which fastener is located along the length of the engagement elements.

92. The device of claim 14 wherein said engagement elements have a length and a fastener that can fasten said engagement elements to the connection rods, which fastener is located at an angle to the length of the engagement elements.

93. The device of claim 14 wherein said engagement elements have a length and a fastener that can fasten said engagement elements to the connection rods, which fastener is rotated about the axis of the length of the engagement element in order to tighten the engagement elements to the connection rods.

94. The device of claim 14 wherein said engagement elements have a length and a fastener that can fasten said engagement elements to the connection rods, which fastener is rotated at an angle to the axis of the length of the engagement element in order to tighten the engagement elements to the connection rods.

95. The device of claim 14 wherein at least one of the engagement elements is rotatably relative to the connection rods and including a mechanism that limits the rotation of the at least one of the engagement elements.

25. An implant device for rigidly fixing adjacent spinous process, the device comprising:

at least one spacer, wherein the spacer further contains a tapered front end adapted for urging the spacer between adjacent spinous process;

a plurality of rotatable engagement elements each adapted to engage a spinous process;

a plurality of connection rods;

whereby the connection rods are movably connected with the spacer; and

whereby the engagement members are selectively locatable at positions along the length of the connection rods.

26. The device according to claim 25, whereby the spacer is substantially circular in shape.

27. The device according to claim 25, whereby the spacer is substantially elliptical in shape.

28. The device according to claim 25, whereby the rotatable engagement elements further have a tapered front end adapted for urging the engagement elements between adjacent spinous process.

29. The device according to claim 25, whereby the connection rods pivot about a longitudinal axis of the spacer.

30. The device according to claim 29, whereby the connection rods pivot independently of each other.

31. The device according to claim 25, whereby the engagement members can further be positioned at any angle relative to the connection rods.

32. The device according to claim 28, whereby the engagement members further have a hook element that is adapted for engaging the spinous process once the tapered front end has been urged between spinous process.

33. The device according to claim 25, wherein said spacer is rotatable.

34. The device of claim 25, wherein the spacer is elliptical in shape.

35. The device of claim 25, wherein the spacer has anatomically compatible contours.

96. The device of claim 25 wherein said engagement elements have a length and a fastener that can fasten said engagement elements to the connection rods, which fastener is located along the length of the engagement elements.

97. The device of claim 25 wherein said engagement elements have a length and a fastener that can fasten said engagement elements to the connection rods, which fastener is located at an angle to the length of the engagement elements.

98. The device of claim 25 wherein said engagement elements have a length and a fastener that can fasten said engagement elements to the connection rods, which fastener is rotated about the axis of the length of the engagement element in order to tighten the engagement elements to the connection rods.

99. The device of claim 25 wherein said engagement elements have a length and a fastener that can fasten said engagement elements to the connection rods, which fastener is rotated at an angle to the axis of the length of the engagement element in order to tighten the engagement elements to the connection rods.

100. The device of claim 25 wherein at least one of the engagement elements is rotatably relative to the connection rods and including a mechanism that limits the rotation of the at least one of the engagement elements.

36. An implant device for rigidly fixing adjacent spinous process, the device comprising:

at least one spacer, wherein the spacer is adapted for being urged between adjacent spinous process;

a plurality of rotatable engagement elements, each adapted to each engage a spinous process;

a plurality of connection rods;

whereby the spacer is connected with the connection rods; and

whereby the engagement members are fastened to the connection rods, and further can be positioned at any location along the length of the connection rods.

37. The device according to claim 36, whereby the spacer is substantially circular in shape.

38. The device according to claim 36, whereby the spacer is substantially elliptical in shape.

39. The device according to claim 36, whereby the rotatable engagement elements further have a tapered front end adapted for urging the engagement elements between adjacent spinous process.

40. The device according to claim 36, whereby the connection rods pivot independently of each other.

41. The device according to claim 36, whereby the rotatable engagement members can further be positioned at any angle relative to the connection rods.

42. The device according to claim 40, whereby the engagement members further have a hook element that is adapted for engaging the spinous process once the tapered front end has been urged between adjacent spinous process.

43. The device of claim 36, wherein the spacer is elliptical in shape.

44. The device of claim 36, wherein the spacer has anatomically compatible contours.

45. An implant device for rigidly fixing adjacent spinous process, the device comprising:

a plurality of rotatable engagement elements adapted to each engage a spinous process;

a plurality of connection rods which are movable with respect to each other;

whereby the engagement members are fastened to the connection rods, and are locatable at positions along the length of the connection rods.

46. The device of claim 45 including a means for movably mounting the connecting rods to each other.

47. The device according to claim 45, whereby the rotatable engagement elements further have a tapered front end adapted for urging the engagement elements between adjacent spinous process.

48. The device according to claim 45, whereby the connection rods pivot independently of each other.

49. The device according to claim 45, whereby the rotatable engagement members can further be positioned at any angle relative to the connection rods.

50. The device according to claim 45, whereby the engagement members further have a hook element that is adapted for engaging the spinous process once the tapered front end has been urged between spinous process.

84. The device of claim 45 including:

an separate spacer adapted for insertion between adjacent spinous processes.

85. The device of claim 45 including:

a spacer that is not connected to the connection rods and which includes a cylindrical body with a stop, which spacer is adapted for insertion of the body between adjacent spinous processes with the stop limiting the motion of the spacer relative to the spinous processes.

51. A method to rigidly fix adjacent spinous process, the method comprising the steps of:

(a) urging a first engagement element between adjacent spinous process;

(b) adjusting the position of the first engagement element such that the first engagement element engages the spinous process;

(c) urging a second engagement element between adjacent spinous process;

(d) adjusting the position of the second engagement element such that the second engagement element engages the spinous process;

(e) urging a spacer between adjacent spinous process; and

(f) fastening the first and second engagement elements to connection rods that are pivotally mounted to the spacer, thus securing the spacer relative to the first and second engagement elements.

52. The method according to claim 51, whereby the spacer in step (e) contains a tapered front end adapted so that the spacer may be urged between adjacent spinous process.

53. The method according to claim 51, whereby the first engagement element in step (a) contains a tapered front end adapted so that the first engagement element may be urged between adjacent spinous process.

54. The method according to claim 51, whereby the second engagement element in step (c) contains a tapered front end adapted so that the second engagement element may be urged between adjacent spinous process.

55. The method according to claim 51, whereby fastening the first and second engagement elements to a connection rod in step (f) is accomplished by a clamp device adapted to fasten to the connection rod, and further to allow the first and second engagement element to rotate.

56. The method according to claim 51, whereby urging the spacer between adjacent spinous process in step (e) is accomplished by inserting the spacer from only one side, thus minimizing the damage to surrounding body tissue.

57. The method according to claim 51, whereby securing the first and second engagement elements to the spinous process in steps (b) and (d) does not require altering the spinous process.

105. The method of claim 51 wherein the steps are conducted in any order.

58. An implant device for rigidly fixing adjacent spinous process, the device comprising:

at least one spacer;

a plurality of rotatable engagement elements, each adapted to engage a spinous process;

a plurality of connection rods;

means for moving the connection rods relative to the spacer; and

means for connecting the rotatable engagement elements with the connection rods.

59. The device according to claim 58, whereby the spacer is substantially elliptical in shape.

60. The device according to claim 58, whereby the spacer is substantially egg shaped.

61. The device according to claim 58, whereby the connecting means include rotatable engagement elements being movably connected to said connection rods.

62. The device according to claim 58, wherein the connection rods are rotatably connected to the spacer.

63. The device of claim 58, wherein said spacer includes means for allowing the spacer to be urged between adjacent spinous processes.

64. The device of claim 58, wherein at least one of said rotatable engagement elements has means for allowing the element to be urged between adjacent spinous processes.

65. The device of claim 58, wherein the spacer is elliptical in shape.

66. The device of claim 58, wherein the spacer has anatomically compatible contours.

67. An implant device for rigidly fixing adjacent spinous processes, the device comprising:

a first and a second spacer, each adapted for urging between adjacent spinous processes;

a first and a second engagement element, each adapted for urging between adjacent spinous processes;

a first and a second connection rod movably mounted to the first spacer;

a third connection rod along with the second connection rod movably mounted to the second spacer; and

whereby the first and the second engagement elements are fastened to the first and the third connection rod respectively.

68. The device according to claim 67, wherein the first and second spacer is substantially circular in shape.

69. The device according to claim 67, wherein the first and second spacer is substantially egg-shaped.

70. The device according to claim 67, whereby the first and second rotatable engagement elements have a tapered front end adapted for urging the first and second engagement elements between adjacent spinous process.

71. The device according to claim 67, whereby the first and second connection rods pivot independently of each other.

72. The device according to claim 67, whereby the engagement elements are fastened to the connection rods so that the engagement elements can be positioned at any location along the length of the connection rods.

73. The device according to claim 67, whereby the engagement members can further be positioned at an angle relative to the connection rods.

74. The device according to claim 70, whereby the first and second engagement members further each have a hook element that is adapted for engaging the spinous process once the tapered front end has been urged between spinous process.

75. The device according to claim 67, wherein the spacer has a tapered front end.

76. The device according to claim 67, wherein the engagement elements are rotatable.

77. The device of claim 67, wherein the spacers are elliptical in shape.

78. The device of claim 67, wherein the spacers have anatomically compatible contours.

79. An implant device for rigidly fixing adjacent spinous process, the device comprising:

at least one spacer, wherein the spacer is adapted for urging between spinous process;

a first engagement element, said element adapted to engage a spinous process;

a first rod;

whereby the first connection rod is movably connected with the spacer; and

whereby the first engagement member is fastened to the first connection rod respectively.

80. An implant device for rigidly fixing adjacent spinous process, the device comprising:

at least one spacer, wherein the spacer further contains a tapered front end adapted for urging the spacer between adjacent spinous process;

an engagement element adapted to engage a spinous process;

a connection rod;

whereby the connection rod is selectively movably connected with the spacer; and

whereby the engagement member is fastened to the connection rod, and further are positionably located along the length of the connection rod.

81. An implant device for rigidly fixing adjacent spinous process, the device comprising:

at least one spacer, wherein the spacer further contains a tapered front end adapted for urging the spacer between adjacent spinous process;

an engagement element adapted to engage a spinous process;

a connection rod;

whereby the connection rod is movably connected with the spacer; and

whereby the engagement member is selectively locatable at positions along the length of the connection rod.

82. An implant device for rigidly fixing adjacent spinous process, the device comprising:

at least one spacer, wherein the spacer is adapted for being urged between adjacent spinous process;

an engagement element adapted to engage a spinous process;

a connection rod;

whereby the spacer is connected with the connection rod; and

whereby the engagement member is fastened to the connection rod, and further can be positioned at any location along the length of the connection rod.

83. An implant device for rigidly fixing adjacent spinous process, the device comprising:

at least one spacer,

an engagement element adapted to engage a spinous process;

a connection rod;

means for rotating the connection rod relative to the spacer; and

means for connecting the engagement element with the connection rod.

101. A method to rigidly fix spinous processes including the steps of:

urging a first engagement element into engagement with a first spinous process;

urging a second engagement element into engagement with a second spinous process;

urging a spacer between the first and the second spinous process; and

using connecting rods to connect the spacer with the first and the second engagement elements.

103. The method of claim 101 wherein the steps are conducted in any order.

102. A method to rigidly fix spinous processes including the steps of:

urging a first engagement element into engagement with a first spinous process;

urging a second engagement element into engagement with a second spinous process;

urging an independent spacer between the first and the second spinous process; and

using connecting rods to connect the first and the second engagement elements.

104. The method of claim 102 wherein the steps are conducted in any order.