Ligating clip with integral penetrating hook
View Patent ↗A polymeric, surgical clip having first and second curved leg members joined at their proximal end by a hinge portion and movable from an open position to a closed position for clamping a vessel between curved deposing inner surfaces which are substantially parallel when the clip is closed. The first leg terminates at its distal end in a deflectable hook member defining a crest or cutting edge along at least a portion of the outer surface thereof, and the second leg member terminates in a locking portion complimentary to the hook member such that when the first and second leg members are moved from an open position to a closed position about the hinge means the hook member will deflect about the distal end of the second leg member to lock the clip in a closed position. The deflection of the hook member will serve to cut connective tissue adjacent a vessel or the like to be clamped when the leg members are closed to aid in locking the clip in the closed position about the vessel or the like to which the surgical clip is applied.
1. In a polymeric surgical clip comprising first and second leg members joined at their proximal ends by a resilient hinge means, each leg member having a vessel clamping inner surface and an opposite outer surface, said vessel clamping inner surface being in opposition to the vessel clamping inner surface of the other leg member, said first leg member terminating at its distal end in a deflectable hook member curved toward said second leg member, said second leg member terminating at its distal end in a locking portion complementary to said hook member whereby when said first and second leg members are moved from an open position to a closed position about said hinge means, the hook member deflects about the distal end of said second leg member to lock the clip in a closed position, said hook member having a continuously curved outer surface extending distally from said outer surface of said first leg member, side surfaces and an inner surface; the improvement comprising:
the continuously curved outer surface of said hook member comprising two convex surfaces extending distally from the inner surface and inwardly from each side surface of the hook member so that the two convex surfaces define a crest or cutting edge therebetween that extends along the length of at least a portion of the outer surface of the hook member; whereby connective tissue adjacent a vessel or the like to be clamped is cut by the crest or cutting edge of the hook member when said leg members are closed to aid in locking the clip in said closed position.
2. The surgical clip according to claim 1 wherein the inner surface of said first leg member has a concave radius of curvature between the hinge means and the hook member and the outer surface of said first leg member has a convex radius of curvature, the inner surface of the second leg member has a convex radius of curvature between the hinge means and its distal end and the outer surface of said second leg member has a concave radius of curvature between the hinge means and its distal end.
3. The surgical clip according to claim 1 wherein said clip comprises means coupled to said first and second leg members for engagement with a suitable clip applier for applying said clips, said engagement means comprising a pair of bosses joined to opposite sides of said first leg member intermediate said hinge means and said hook portion, and a pair of bosses joined to opposite sides of said second leg member at the distal end of said second leg member, said second leg member having sharp pointed members extending from said bosses.
4. The surgical clip according to claim 3 wherein a portion of said pair of bosses joined to said first leg member extend beyond the outer surface of said first leg member to form substantially parallel and spaced apart surfaces which prevent lateral movement of said first and second leg members relative to one another when the clip is in the closed position.
5. The surgical clip according to claim 4 wherein the inner surfaces of said clip each comprise a plurality of protrusions for providing improved vessel retention during closure of the clips.
6. The surgical clip according to claim 1 wherein said clip further comprises a sharp pointed member attached on each side of the distal end of said second leg member and extending beyond the inner surface of said second leg member, said sharp pointed members of said second leg member cooperating with the cutting edge of said hook member to cut said connective tissue when said clip is moved from said open position to said closed position.