Anchor and anchor installation tool and method

• US 5,690,649 A
• Filed: 12/05/1995
• Issued: 11/25/1997
• Est. Priority Date: 12/05/1995
• Status: Expired due to Term

• Current Assignee: Linvatec Corporation (Jefferies Financial Group, Inc.)
• Original Assignee: Li Medical Technologies, Inc.
• Inventors: Li, Lehmann K.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): PHAM, THUY D
• Application Number:
  US08/567,490
• Time in Patent Office: 721 Days
• Field of Search: 606/139, 606/232, 606/60, 606/104, 606/72, 606/73, 606/75, 623/13, 411/2, 411/172, 411/174-176, 411/180, 411/188
• US Class Current: 606/139
• CPC Class Codes: A61B 17/0401 Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors A61B17/0642 takes precedence; fixation devices for tendons or ligaments A61F2/0811
• CPC Class Codes: A61B 17/0642 for bones, e.g. for osteosynthesis or connecting tendon to bone
• CPC Class Codes: A61B 2017/0023 disposable
• CPC Class Codes: A61B 2017/0409 Instruments for applying suture anchors
• CPC Class Codes: A61B 2017/0424 the separate member staying in the anchor after placement
• CPC Class Codes: A61B 2017/0454 the anchor being crimped or clamped on the suture
• CPC Class Codes: A61B 2017/0647 having one single leg, e.g. tacks
• CPC Class Codes: A61B 2090/037 with a frangible part, e.g. by reduced diameter

Abstract

Apparatus for inserting an anchor into a bore in a medium, the anchor being adapted to engage the walls of the bore for securing the anchor into the medium. The bore is sized slightly larger than the outside diameter of the anchor in its undeployed condition. The apparatus includes a first manually graspable member having a distal end and a proximal end, the distal end being adapted to releasably receive the anchor. The manually graspable member has a central opening therethrough, the proximal end of the manually graspable member having a pivotable handle extending therefrom. A second member is movable longitudinally in the central opening and is attached to the pivotable handle and to the anchor. A release member couples the anchor to the second member. The pivotable handle is pivotable with respect to the first member and exerts a force longitudinally on the second member to move the second member longitudinally in the first member. This movement exerts a force on the anchor connected thereto to deform the anchor to cause the anchor to engage the walls of the medium thereby to secure the anchor in the medium. The force exerted on the second member further acts on the release member to separate the anchor from the second member when the anchor has deformed to engage the walls of the bore.

Claims

1. Apparatus for inserting an anchor into a bore in a medium, the anchor being adapted to engage the walls of the bore for securing the anchor into the medium, the apparatus comprising:

a first manually graspable member having a distal end, a proximal end and a longitudinal axis, the distal end being adapted to releasably receive an anchor, said manually graspable member having a central opening therethrough, the proximal end of the manually graspable member having a pivotable handle extending therefrom;

a second member movable longitudinally in the central opening attached to said pivotable handle and to said anchor;

a release member releasably coupling said anchor to said second member;

said pivotable handle being pivotable with respect to said first member about an axis perpendicular to the longitudinal axis of the first member and exerting a force longitudinally on said second member as said handle pivots to move said second member longitudinally in said first member and exert a force on said anchor connected thereto to deform said anchor to cause said anchor to engage the walls of the medium thereby to secure the anchor in the medium;

said longitudinal force exerted on said second member as said handle pivots further acting on said release member to separate said anchor from said second member after said anchor has deformed to engage the walls of the bore.

2. The apparatus of claim 1, wherein the apparatus is disposable and designed for a single use.

3. Apparatus for inserting an anchor into a bore in a medium, the anchor being adapted to engage the walls of the bore for securing the anchor into the medium, the apparatus comprising:

a first manually graspable member having a distal end and a proximal end, the distal end being adapted to releasably receive an anchor, said manually graspable member having a central opening therethrough, the proximal end of the manually graspable member having a pivotable handle extending therefrom;

a second member movable longitudinally in the central opening attached to said pivotable handle and to said anchor;

a release member releasably coupling said anchor to said second member;

said pivotable handle being pivotable with respect to said first member and exerting a force longitudinally on said second member as said handle pivots to move said second member longitudinally in said first member and exert a force on said anchor connected thereto to deform said anchor to cause said anchor to engage the walls of the medium thereby to secure the anchor in the medium;

said longitudinal force exerted on said second member as said handle pivots further acting on said release member to separate said anchor from said second member after said anchor has deformed to engage the walls of the bore; and

wherein the release member coupling the anchor to the second member comprises a frangible connection which breaks upon the exertion of said force on said second member beyond a preset amount.

4. The apparatus of claim 3, wherein the second member comprises:

a flexible longitudinally extending member coupled to said handle; and

a coupler fastened to a distal end of the flexible member, the coupler being attached to said anchor.

5. The apparatus of claim 4, wherein said flexible member comprises a wire or cable.

6. The apparatus of claim 4, wherein the anchor comprises:

a cylindrical hollow section having a plurality of longitudinally extending fingers for outward radial movement for engaging the walls of the bore on deformation of the anchor; and

a central longitudinally extending member extending through the hollow section having a shoulder at a distal end preventing movement proximally past the hollow section, the central member having a shaft for engagement by the coupler, said central member including said frangible connection.

7. The apparatus of claim 6, wherein the central member is threaded into engagement with an internally threaded bore in said coupler.

8. The apparatus of claim 6, wherein said anchor comprises two cylindrical hollow sections each having a plurality of longitudinally extending interdigitated fingers, the fingers of one section extending proximally and the fingers of the other section extending distally.

9. The apparatus of claim 5, wherein the first member at the distal end thereof includes a surface for engaging one of said hollow sections, and each said section includes a cam surface for engaging an opposed one of said fingers on the opposite section for deforming said opposed fingers outwardly for engagement with the walls of the bore in the medium upon the application of said force to said second member.

10. The apparatus of claim 6, wherein the first member at the distal end thereof includes:

a cam surface for engaging the fingers of said hollow section to deform said fingers outwardly for engagement with the walls of the bore in the medium upon the application of said force to said second member.

11. The apparatus of claim 6, wherein said anchor comprises a medical suture anchor for anchoring a suture in organic tissue, said first member including at least one opening therein through which a suture fastened to said anchor is threaded.

12. The apparatus of claim 11, wherein said central member has a forked end extending distally, said suture being looped through a region between forks of said forked end, the first member having two opposed openings therein through which respective free ends of the suture are threaded.

13. The apparatus of claim 11, wherein there are a plurality of sutures.

14. The apparatus of claim 6, wherein said frangible connection comprises a portion of reduced thickness and strength in said central member.

15. The apparatus of claim 14, wherein said hollow section and central member comprise metal or plastic.

16. The apparatus of claim 15, wherein said hollow section and central member comprise biocompatible metal or plastic.

17. The apparatus of claim 4, wherein said handle at the proximal end of the first member is fastened to said first member by a second frangible connection, said second frangible connection being breakable upon the application of a transverse force to said handle causing said handle to pivot with respect to said first member and exert the longitudinal force on said flexible member.

18. The apparatus of claim 17, wherein said handle includes a cam surface at a distal end for engaging with an opposed cam surface on the first member after said second frangible connection breaks, the engagement of said cam surfaces with each other upon application of said transverse force causing said flexible member to be pulled through said first member, causing said longitudinal force to be applied to said anchor to deform said anchor.

19. The apparatus of claim 18, wherein said handle, said second frangible connection and two opposed cam surfaces comprise an integral unit with the first member, the flexible member being slidably receivable in said first member.

20. The apparatus of claim 18, wherein said flexible member is secured in a coupling at said distal end thereof, said coupling being threadedly engaged in a passageway in said handle.

21. The apparatus of claim 17, wherein said second frangible connection comprises a portion of reduced thickness and strength in said handle.

22. The apparatus of claim 21, wherein the handle comprises a plastic.

23. The apparatus of claim 4, wherein the coupler is slidable in an insert received within the distal end of said first member.

24. A method of securing an anchor into a bore in a medium, the anchor being adapted to engage the walls of the bore for securing the anchor into the medium, the method comprising:

inserting an anchor held to a distal end of an insertion tool into the bore, the insertion tool having a longitudinal axis;

applying a force to a lever extending from the insertion tool to pivot the lever about an axis perpendicular to the longitudinal axis to cause a force to be exerted on the anchor by a coupling member to deform the anchor into engagement with the walls of the bore in the medium and separating the anchor from the coupling member; and

pulling the insertion tool away from the anchor leaving the anchor secured in the bore in the medium.

27. The method of claim 24, wherein the step of deforming the anchor comprises exerting said force on said anchor to pull proximally extending fingers of said anchor into engagement with a cam surface causing said fingers to extend radially outwardly into engagement with the walls of the bore.

28. The method of claim 27, wherein the anchor comprises proximal and distal hollow cylindrical sections having interdigitated longitudinally extending fingers and further wherein the step of deforming the anchor comprises exerting said force on said anchor to move proximally extending fingers on the distal hollow cylindrical section and distally extending fingers on the proximal hollow cylindrical section into engagement with opposed cam surfaces on the opposite hollow cylindrical section causing said fingers to extend radially outwardly into engagement with the walls of the bore.

25. A method of securing an anchor into a bore in a medium, the anchor being adapted to engage the walls of the bore for securing the anchor into the medium, the method comprising:

inserting an anchor held to a distal end of an insertion tool into the bore;

applying a force to a lever extending from the insertion tool to cause a force to be exerted on the anchor by a coupling member to deform the anchor into engagement with the walls of the bore in the medium and separating the anchor from the coupling member; and

pulling the insertion tool away from the anchor leaving the anchor secured in the bore in the medium;

wherein the step of separating the anchor from the coupling member comprises breaking a frangible connection between the anchor and the coupling member by the application of said force after said anchor has deformed into engagement with the walls of said bore.

26. The method of claim 25, wherein the step of applying a force to the lever handle includes the step of breaking a frangible connection between the lever handle and the insertion tool and pivoting the handle about the insertion tool on opposed cam surfaces of the handle and insertion tool to apply said force to a flexible member coupled to the anchor to transfer the force to the anchor to deform the anchor and break the frangible connection between the anchor and the coupling member.

29. A method of securing an anchor into a bore in a medium, the anchor being adapted to engage the walls of the bore for securing the anchor into the medium, the method comprising:

inserting an anchor, connected to a coupling member held to a distal end of an insertion tool, into the bore;

applying a force to a lever extending from the insertion tool to cause a force to be exerted on the anchor by a coupling member to deform the anchor into engagement with the walls of the bore in the medium and separating the anchor from the coupling member; and

pulling the insertion tool away from the anchor leaving the anchor secured in the bore in the medium;

wherein said anchor comprises a biocompatible anchor adapted to be implanted in organic tissue and further comprising the step of coupling a suture to said anchor prior to said step of inserting.

30. A method of securing an anchor into a bore in a medium, the anchor being adapted to engage the walls of the bore for securing the anchor into the medium, the method comprising:

inserting an anchor held to a distal end of an insertion tool into the bore;

applying a force to a lever extending from the insertion tool to cause a force to be exerted on the anchor by a coupling member to deform the anchor into engagement with the walls of the bore in the medium and separating the anchor from the coupling member; and

pulling the insertion tool away from the anchor leaving the anchor secured in the bore in the medium;

wherein the step of applying a force to the lever comprises applying a transverse force to the lever to cause the lever to pivot and cam against a surface of the insertion tool thereby to apply a tensile force to the coupling member.

31. Apparatus for inserting an anchor into a bore in a medium, the anchor being adapted to engage the walls of the bore for securing the anchor into the medium, the apparatus comprising:

an anchor comprising at least one hollow cylindrical section having longitudinally extending fingers adapted to be deformed radially outwardly to engage the walls of the bore to secure the anchor in the medium;

a first manually graspable member having a distal end, a proximal end and a longitudinal axis, the distal end releasably receiving the anchor, said manually graspable member having a central opening therethrough, the proximal end of the manually graspable member having a pivotable handle extending therefrom;

a second member movable longitudinally in the central opening attached to said pivotable handle and to said anchor;

a release member releasably coupling said anchor to said second member;

said pivotable handle being pivotable with respect to said first handle about an axis perpendicular to the longitudinal axis of the first member and exerting a force longitudinally on said second member as said handle pivots to move said second member longitudinally in said first member and exert a force on said anchor connected thereto to deform said anchor to cause said anchor to engage the walls of the medium thereby to secure the anchor in the medium; and

said longitudinal force exerted on said second member as said member pivots further acting on said release member to separate said anchor from said second member after said anchor has deformed to engage the walls of the bore.

32. The apparatus of claim 31, wherein the apparatus is disposable and designed for a single use.

33. Apparatus for inserting an anchor into a bore in a medium, the anchor being adapted to engage the walls of the bore for securing the anchor into the medium, the apparatus comprising:

an anchor comprising at least one hollow cylindrical section having longitudinally extending fingers adapted to be deformed radially outwardly to engage the walls of the bore to secure the anchor in the medium;

a first manually graspable member having a distal end and a proximal end, the distal end releasably receiving the anchor, said manually graspable member having a central opening therethrough, the proximal end of the manually graspable member having a pivotable handle extending therefrom;

a second member movable longitudinally in the central opening attached to said pivotable handle and to said anchor;

a release member releasably coupling said anchor to said second member;

said pivotable handle being pivotable with respect to said first member and exerting a force longitudinally on said second member as said handle pivots to move said second member longitudinally in said first member and exert a force on said anchor connected thereto to deform said anchor to cause said anchor to engage the walls of the medium thereby to secure the anchor in the medium; and

said longitudinal force exerted on said second member as said pivots further acting on said release member to separate said anchor from said second member after said anchor has deformed to engage the walls of the bore;

wherein the release member coupling the anchor to the second member comprises a frangible connection which breaks upon the exertion of said force on said second member beyond a preset amount.

34. The apparatus of claim 33, wherein the second member comprises:

a flexible longitudinally extending member coupled to said handle; and

a coupler fastened to a distal end of the flexible member, the coupler being attached to said anchor.

35. The apparatus of claim 34, wherein said flexible member comprises a wire or cable.

36. The apparatus of claim 34, wherein the coupler is slidable in an insert received within the distal end of said first member.

37. The apparatus of claim 34, wherein said handle at the proximal end of the first member is fastened to said first member by a second frangible connection, said second frangible connection being breakable upon the application of a transverse force to said handle causing said handle to pivot with respect to said first member and exert the longitudinal force on said flexible member.

38. The apparatus of claim 37, wherein said handle includes a cam surface at a distal end for engaging with an opposed cam surface on the first member after said second frangible connection breaks, the engagement of said cam surfaces with each other upon application of said transverse force causing said flexible member to be pulled through said first member, causing said longitudinal force to be applied to said anchor to deform said anchor.

39. The apparatus of claim 38, wherein said handle, said second frangible connection and two opposed cam surfaces comprise an integral unit with the first member, the flexible member being slidably receivable in said first member.

40. The apparatus of claim 38, wherein said flexible member is secured in a coupling at said distal end thereof, said coupling being threadedly engaged in a passageway in said handle.

41. The apparatus of claim 37, wherein said second frangible connection comprises a portion of reduced thickness and strength in said handle.

42. The apparatus of claim 41, wherein the handle comprises a plastic.

43. The apparatus of claim 33, wherein the anchor comprises:

said cylindrical hollow section having a plurality of longitudinally extending fingers for outward radial movement for engaging the walls of the bore on deformation of the anchor; and

a central longitudinally extending member extending through the hollow section having a shoulder at a distal end preventing movement proximally past the hollow section, the central member having a shaft for engagement by the coupler, said central member including said frangible connection.

44. The apparatus of claim 43, wherein the central member is threaded into engagement with an internally threaded bore in said coupler.

45. The apparatus of claim 43, wherein said anchor comprises two cylindrical hollow sections each having a plurality of longitudinally extending interdigitated fingers, the fingers of one section extending proximally and the fingers of the other section extending distally.

46. The apparatus of claim 45, wherein the first member at the distal end thereof includes a surface for engaging one of said hollow sections, and each said hollow section includes a cam surface for engaging opposed ones of said fingers on the opposite section for deforming said opposed fingers outwardly for engagement with the walls of the bore in the medium upon the application of said force to said second member.

47. The apparatus of claim 43, wherein the first member at the distal end thereof includes:

a cam surface for engaging the fingers of said hollow section to deform said fingers outwardly for engagement with the walls of the bore in the medium upon the application of said force to said second member.

48. The apparatus of claim 43, wherein said anchor comprises a medical suture anchor for anchoring a suture in organic tissue, said first member including at least one opening therein through which a suture fastened to said anchor is threaded.

49. The apparatus of claim 48, wherein said central member has a forked end extending distally, said suture being looped through a region between forks of said forked end, the first member having two opposed openings therein through which respective free ends of the suture are threaded.

50. The apparatus of claim 48, wherein there are a plurality of sutures.

51. The apparatus of claim 43, wherein said frangible connection comprises a portion of reduced thickness and strength in said central member.

52. The apparatus of claim 51, wherein said hollow section and central member comprise metal or plastic.

53. The apparatus of claim 52, wherein said hollow section and central member comprise a biocompatible metal or plastic.

54. An anchor for implantation in a bore in a medium, the anchor comprising:

a cylindrical hollow section having a plurality of longitudinally extending fingers for outward radial movement for engaging the walls of the bore in response to a force applied to the anchor by an insertion tool causing the fingers to move against a cam surface; and

a central longitudinally extending member extending through the hollow section and having a shoulder at a distal end preventing movement proximally past the section, the central member having a shaft for engagement by an insertion tool, said central member including a releasable connection for separating a distal portion of the central member from a proximal portion of the central member coupled to the insertion tool;

the releasable connection comprising a frangible connection which breaks upon the exertion of a force by the insertion tool on the central member beyond a preset amount.

55. The anchor of claim 54, wherein said anchor comprises two cylindrical hollow sections each having a plurality of longitudinally extending interdigitated fingers, the fingers of one section extending proximally and the fingers of the other section extending distally.

56. The anchor of claim 54, wherein the frangible connection comprises a portion of reduced thickness and strength in said central member.

57. The anchor of claim 56, wherein the frangible connection comprises a slit or score line in the central member causing the central member to have reduced tensile strength at the slit or score line.

58. The anchor of claim 54, wherein the central member is threaded into engagement with an internally threaded bore of a coupler of an insertion tool.

59. The anchor of claim 54 wherein the hollow section and central member comprise metal or plastic.

60. The anchor of claim 59, wherein the hollow section and central member comprise biocompatible metal or plastic.

62. The anchor of claim 55, further in combination with an insertion tool for installing the anchor;

wherein the insertion tool at a distal end thereof includes a surface for engaging one of said sections, and each said section includes a cam surface for engaging opposed ones of said fingers on the opposite section for deforming said opposed fingers outwardly for engagement with the walls of the bore in the medium upon the application of a force by said insertion tool.

61. In combination with an insertion tool for installing an anchor in a bore in a medium, the anchor comprising:

a cylindrical hollow section having a plurality of longitudinally extending fingers for outward radial movement for engaging the walls of the bore in response to a force applied to the anchor by an insertion tool causing the fingers to move against a cam surface; and

a central longitudinally extending member extending through the hollow section and having a shoulder at a distal end preventing movement proximally past the section, the central member having a shaft for engagement by an insertion tool, said central member including a releasable connection for separating a distal portion of the central member from a proximal portion of the central member coupled to the insertion tool; and

wherein the insertion tool at a distal end thereof includes a cam surface for engaging the fingers of said hollow section to deform said fingers outwardly for engagement with the walls of the bore in the medium upon application of a force by said insertion tool.

63. In combination with an insertion tool for installing an anchor in a bore in a medium, the anchor comprising:

a cylindrical hollow section having a plurality of longitudinally extending fingers for outward radial movement for engaging the walls of the bore in response to a force applied to the anchor by an insertion tool causing the fingers to move against a cam surface; and

a central longitudinally extending member extending through the hollow section and having a shoulder at a distal end preventing movement proximally past the section, the central member having a shaft for engagement by an insertion tool, said central member including a releasable connection for separating a distal portion of the central member from a proximal portion of the central member coupled to the insertion tool; and

wherein said anchor comprises a medical suture anchor for anchoring a suture in organic tissue, the insertion tool having at least one opening therein through which the suture fastened to the anchor is threaded.

64. The anchor of claim 63 wherein there are a plurality of sutures.

65. In combination with an insertion tool for installing an anchor in a bore in a medium, the anchor comprising:

a cylindrical hollow section having a plurality of longitudinally extending fingers for outward radial movement for engaging the walls of the bore in response to a force applied to the anchor by an insertion tool causing the fingers to move against a cam surface; and

a central longitudinally extending member extending through the hollow section and having a shoulder at a distal end preventing movement proximally past the section, the central member having a shaft for engagement by an insertion tool, said central member including a releasable connection for separating a distal portion of the central member from a proximal portion of the central member coupled to the insertion tool; and

wherein said anchor comprises a medical suture anchor for anchoring a suture in organic tissue, the insertion tool having at least one opening therein through which the suture fastened to the anchor is threaded; and

further

wherein said central member has a forked end extending distally, said suture being looped through a region between forks of said forked end, the insertion tool having two opposed openings therein through which respective free ends of the suture are threaded.