Suture anchor
DCFirst Claim
1. A method of anchoring a suture, said method comprising the steps of providing an anchor which has a suture extending from the anchor, inserting the anchor into body tissue, expanding the anchor in the body tissue, said step of expanding the anchor includes absorbing body liquid into the anchor and increasing the volume of the anchor as body liquid is absorbed into the anchor, and tensioning the suture to transmit force to the anchor.
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Abstract
A suture anchor is formed of a material which absorbs body liquid when exposed to body liquid. The anchor may be at least partially formed of a material having a strong affinity for body liquids. This enables the anchor to absorb body liquid and expand upon being inserted into a patient'"'"'s body. At least one embodiment of the suture anchor has portions formed of a relatively hard material which does not absorb body liquids and is pressed against body tissue by the material which absorbs body liquid to mechanically interlock the suture anchor and the body tissue. The anchor may be at least partially formed of a cellular material. The-cells expand to absorb body liquid. At least one embodiment of the anchor has a pointed leading end portion to form an opening in an imperforate surface on body tissue. The configuration of the anchor may be changed by tensioning the suture while the anchor is disposed in body tissue.
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Citations
124 Claims
- 1. A method of anchoring a suture, said method comprising the steps of providing an anchor which has a suture extending from the anchor, inserting the anchor into body tissue, expanding the anchor in the body tissue, said step of expanding the anchor includes absorbing body liquid into the anchor and increasing the volume of the anchor as body liquid is absorbed into the anchor, and tensioning the suture to transmit force to the anchor.
- 18. A method of anchoring a suture, said method comprising the steps of providing an anchor having a suture extending from the anchor and having a longitudinal central axis which extends through first and second end portions of the anchor and a first cross sectional area as viewed in a plane extending perpendicular to the longitudinal central axis at a location midway between the first and second end portions of the anchor, inserting the anchor into body tissue with the suture extending from the anchor, and expanding the anchor in the body tissue to establish an interlock between the anchor and body tissue, said step of expanding the anchor includes increasing the distance between the first and second end portions of the anchor and increasing the first cross sectional area of the anchor as viewed in a plane extending perpendicular to the longitudinal central axis of the anchor at a location midway between the first and second end portions of the anchor.
- 24. A method of anchoring a suture, said method comprising the steps of providing an anchor having a plurality of cells and a suture extending from the anchor, collapsing the plurality of cells in the anchor, inserting the anchor into body tissue with the suture extending from the anchor and with the plurality of cells collapsed, and expanding the anchor in the body tissue, said step of expanding the anchor in the body tissue includes expanding the plurality of collapsed cells in the anchor.
- 38. A method of anchoring a suture, said method comprising the steps of providing an anchor with a suture extending from the anchor, moving the anchor into body tissue along a path in a member while the anchor has a first volume and a first orientation in which an axis of the anchor extends parallel to a longitudinal central axis of the path, changing the orientation of the anchor from the first orientation to a second orientation in which the axis of the anchor extends transverse to the longitudinal central axis of the path, and expanding the anchor from the first volume to a second volume while the anchor is in the body tissue.
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48. A method of anchoring a suture, said method comprising the steps of providing an anchor which has a suture extending from the anchor, inserting the anchor into body tissue, said step of inserting the anchor into body tissue being at least partially performed while a longitudinal central axis of the anchor has a first configuration, and changing the configuration of the longitudinal central axis of the anchor from the first configuration to a second configuration which is different than the first configuration while the anchor is in the body tissue.
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49. A method of anchoring a suture, said method comprising the steps of providing an anchor which has a suture extending from the anchor, inserting the anchor into body tissue with the suture extending from the anchor, changing the orientation of the anchor from a first orientation to a second orientation while the anchor is in the body tissue, and expanding the anchor while the anchor is disposed in the second orientation in the body tissue.
- 50. A method of anchoring a suture, said method comprising the steps of providing an anchor with a suture extending from the anchor, engaging an imperforate surface on body tissue with a first end portion of the anchor, applying force against a second end portion of the anchor to press the first end portion of the anchor against the body tissue and for an opening in the surface on the body tissue, moving the anchor through the opening into body tissue, and expanding the anchor in the body tissue, said step of expanding the anchor includes absorbing body liquid into the anchor and increasing the volume of the anchor as body liquid is absorbed into the anchor.
- 53. A method of anchoring a suture, said method comprising the steps of providing an anchor with a suture extending from the anchor, engaging an imperforate surface on body tissue with a member, forming an opening in the imperforate surface of the body tissue, moving at least a portion of the member into the body tissue through the opening in the surface of the body tissue, moving the anchor along a passage in the member with the suture extending from the anchor, moving the anchor out of the passage in the member into the body tissue, and expanding the anchor, said step of expanding the anchor includes absorbing body liquid into the anchor and increasing the volume of the anchor as body liquid is absorbed into the anchor.
- 62. A method of anchoring a suture, said method comprising the steps of providing an anchor which has a suture extending from the anchor, inserting the anchor into body tissue, said step of inserting the anchor into body tissue being at least partially performed while a longitudinal central axis of the anchor has a first configuration, changing the configuration of the longitudinal central axis of the anchor from the first configuration to a second configuration which is different than the first configuration while the anchor is in the body tissue, and expanding the anchor in the body tissue, said step of expanding the anchor includes absorbing body liquid into the anchor and increasing the volume of the anchor as the body liquid is absorbed into the anchor.
- 66. A method of anchoring a suture, said method comprising the steps of providing an anchor which has a suture extending from the anchor, inserting the anchor into body tissue, said step of inserting the anchor into body tissue being at least partially performed while a longitudinal central axis of the anchor has a first configuration, and changing the configuration of the longitudinal central axis of the anchor from the first configuration to a second configuration which is different than the first configuration while the anchor is in the body tissue, said step of changing the configuration of the longitudinal central axis of the anchor from the first configuration to the second configuration includes tensioning the suture to transmit force through the suture to the anchor and applying force against an outer side surface of the anchor with the body tissue in opposition to the force transmitted to the anchor through the suture.
- 74. A method of anchoring a suture, said method comprising the steps of providing an anchor which has a suture extending from the anchor, inserting the anchor into body tissue, said step of inserting the anchor into body tissue being at least partially performed while a longitudinal central axis of the anchor has a first configuration, and changing the configuration of the longitudinal central axis of the anchor from the first configuration to a second configuration which is different than the first configuration while the anchor is in the body tissue, said step of changing the configuration of the longitudinal central axis of the anchor from the first configuration to a second configuration which is different than the first configuration includes applying force to opposite end portions of the anchor with the suture.
- 82. A method of anchoring a suture, said method comprising the steps of providing an anchor which has a suture extending from the anchor, inserting the anchor into body tissue, said step of inserting the anchor into body tissue being at least partially performed while a longitudinal central axis of the anchor has a first configuration, and changing the configuration of the longitudinal central axis of the anchor from the first configuration to a second configuration which is different than the first configuration while the anchor is in the body tissue, said step of changing the configuration of the longitudinal central axis of the anchor from the first configuration to a second configuration which is different than the first configuration includes applying force to a central portion of the anchor with the suture.
- 88. A method of anchoring a suture, said method comprising the steps of providing an anchor which has a suture extending from the anchor, inserting the anchor into body tissue, said step of inserting the anchor into body tissue being at least partially performed while a longitudinal central axis of the anchor has a first configuration, and changing the configuration of the longitudinal central axis of the anchor from the first configuration to a second configuration which is different than the first configuration while the anchor is in the body tissue, said step of changing the configuration of the longitudinal central axis of the anchor from the first configuration to a second configuration which is different than the first configuration includes changing the configuration of at least a portion of the longitudinal central axis of the anchor from a linear configuration to an arcuate configuration.
- 93. A method of anchoring a suture, said method comprising the steps of providing an anchor which has a suture extending from the anchor, inserting the anchor into body tissue with the suture extending from the anchor, changing the orientation of the anchor from a first orientation to a second orientation while the anchor is in the body tissue, and expanding the anchor while the anchor is disposed in the second orientation in the body tissue, said step of expanding the anchor includes absorbing body liquid into the anchor and increasing the volume of the anchor as body liquid is absorbed into the anchor.
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103. A method of anchoring a suture, said method comprising the steps of providing an anchor which has a suture extending from the anchor, inserting the anchor into body tissue with the suture extending from the anchor, changing the orientation of the anchor from a first orientation to a second orientation while the anchor is in the body tissue, and expanding the anchor while the anchor is disposed in the second orientation in the body tissue, the anchor is at least partially formed of a cellular material, said step of inserting the anchor into body tissue is performed with cells in the cellular material in a contracted condition, said step of expanding the anchor includes increasing the size of the cells of the anchor.
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104. A method of anchoring a suture, said method comprising the steps of providing an anchor which has a suture extending from the anchor, inserting the anchor into body tissue with the suture extending from the anchor, changing the orientation of the anchor from a first orientation to a second orientation while the anchor is in the body tissue, and expanding the anchor while the anchor is disposed in the second orientation in the body tissue, the anchor is at least partially formed of a material which is hydrophilic, said step of expanding the anchor includes conducting body liquid into the anchor under the influence of attraction between the hydrophilic material of the anchor and the body liquid.
- 105. A method of anchoring a suture, said method comprising the steps of providing an anchor which has a suture extending from the anchor, inserting the anchor into body tissue with the suture extending from the anchor, changing the orientation of the anchor from a first orientation to a second orientation while the anchor is in the body tissue, and expanding the anchor while the anchor is disposed in the second orientation in the body tissue, said step of inserting the anchor into body tissue includes piercing an imperforate surface area on the body tissue with a leading end portion of the anchor and moving the anchor through an opening formed in the body tissue during performance of said step of piercing an imperforate surface area on the body tissue.
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112. A method of anchoring a suture, said method comprising the steps of providing an anchor which has a suture extending from the anchor, inserting the anchor into body tissue with the suture extending from the anchor, changing the orientation of the anchor from a first orientation to a second orientation while the anchor is in the body tissue, expanding the anchor while the anchor is disposed in the second orientation in the body tissue, and changing the configuration of at least a portion of a longitudinal central axis of the anchor from a linear configuration to an arcuate configuration while the anchor is in the body tissue.
- 113. A method of anchoring a suture, said method comprising the steps of providing an anchor which has a suture extending from the anchor, inserting the anchor into body tissue with the suture extending from the anchor, changing the orientation of the anchor from a first orientation to a second orientation while the anchor is in the body tissue, and expanding the anchor while the anchor is disposed in the second orientation in the body tissue, said step of changing the orientation of the anchor from a first orientation to a second orientation includes pivoting the anchor relative to body tissue while an outer side surface of the anchor is disposed in engagement with the body tissue.
- 118. A method of anchoring a suture, said method comprising the steps of providing an anchor which has a suture extending from the anchor, inserting the anchor into body tissue with the suture extending from the anchor, changing the orientation of the anchor from a first orientation to a second orientation while the anchor is in the body tissue, and expanding the anchor while the anchor is disposed in the second orientation in the body tissue, said step of changing the orientation of the anchor from a first orientation to a second orientation includes tensioning the suture to apply torque to the anchor while an outer side surface of the anchor is disposed in engagement with body tissue.
- 122. A method of anchoring a suture, said method comprising the steps of providing an anchor which has a suture extending from the anchor, inserting the anchor into body tissue with the suture extending from the anchor, changing the orientation of the anchor from a first orientation to a second orientation while the anchor is in the body tissue, and expanding the anchor while the anchor is disposed in the second orientation in the body tissue, said step of inserting the anchor into body tissue includes moving the anchor along a passage formed in a tubular member, said step of changing the orientation of the anchor from a first orientation to a second orientation includes moving the anchor along a bend formed in the passage in the tubular member.
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124. A method of anchoring a suture, said method comprising the steps of providing an anchor which is formed of collagen, inserting the anchor formed of collagen into body tissue, expanding the anchor formed of collagen in the body tissue, said step of expanding the anchor formed of collagen includes absorbing body liquid into the anchor formed of collagen and increasing the volume of the anchor formed of collagen as body liquid is absorbed into the anchor, and tensioning a suture connected with the anchor formed of collagen to transmit force to the anchor formed of collagen.
Specification