Suture anchor

摘要

There is described a suture anchor with anchor members moveable as between a suture-unlocked configuration and suture-locked configuration. In one embodiment, the anchor members include an outer anchor member with features, e.g., flexible barbs, configured to secure the suture anchor in the suture-locked configuration to material proximate a pre-formed hole in bone material. The outer anchor member is also configured with a bore to receive suture material, and which is sized and shaped to receive an inner anchor member therein. The inner anchor member includes securing features such as projections that compress the suture material against the surface of the bore when the suture anchor is actuated from the suture-unlocked configuration to the suture-locked configuration.

主权项

1. A suture anchor for securing suture material to bone, said suture anchor comprising:
an outer anchor member having a bore surface defining a bore extending from a distal end to a proximal end along a longitudinal axis; an inner anchor member moveable within the bore between a suture-unlocked configuration and a suture-locked configuration, the inner anchor member including an actuator tool engagement region configured to engage a mandrel to pass a force required to move the inner anchor member from the suture-unlocked configuration to the suture-locked configuration; two apertures extending through the outer anchor member from an outer surface of the outer anchor member to the bore such that the apertures oppose one another across the longitudinal axis; an upper step feature disposed on the outer anchor member, the upper step feature comprising a tapered surface sloping from the distal end to an outer peripheral surface; a lower step feature including a lower peripheral surface located on an offset being radially inward from the outer peripheral surface; an eyelet opening positioned proximal the upper step feature and on the lower step feature, the eyelet opening extending through the outer anchor member in a manner exposing the bore, the eyelet opening being configured to accommodate at least two strands of the suture material, a securing feature disposed on an outer surface of the inner anchor member, the securing feature configured to compress the suture material against the bore surface when the inner anchor member is in the suture-locked configuration; and two flexible barbs disposed on the outer anchor member, each of the flexible barbs being hinged from a distal extent thereof to a distal wall of a respective one of the two apertures, the flexible barbs being elastically compressible to a first dimension in the suture-unlocked configuration and the flexible barbs being maintained to a second dimension in the suture-locked configuration, wherein the first dimension is smaller than the second dimension, wherein said upper step feature comprises a generally arcuate shape describing an angle about the longitudinal axis, the angle being limited such that the upper step feature is missing distal to and proximate the two flexible barbs.