Double-diameter knot pusher
First Claim
Patent Images
1. An apparatus consisting essentially of:
- an inner tube having a distal end for pushing and holding suture, a proximal end, a lumen, and an outer surface; and
an outer tube disposed slidably over the inner tube, the outer tube having a distal end for pushing suture, a proximal end, and a lumen receiving the inner tube,wherein the distal end of the outer tube and the outer surface of the inner tube cooperate to prevent passage of suture between the inner tube and the outer tube when the outer tube is advanced toward the distal end of the inner tube to advance a loop of suture along the outer surface of the inner tube.
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Abstract
A disposable, double-diameter knot pusher for use in arthroscopic surgery. The knot pusher is formed of two telescoped tubes, specifically, an inner, smaller diameter pusher tube slidably disposed within an outer, larger diameter pusher tube. The first knot is thrown around the suture post limb, and is pushed along the post limb with the inner tube. The inner tube holds the first knot in place, while the second knot is thrown around the inner tube and pushed into place with the outer tube. A suture passer is used to draw a post section of suture through the inner tube to begin the knot-tying process.
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Citations
20 Claims
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1. An apparatus consisting essentially of:
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an inner tube having a distal end for pushing and holding suture, a proximal end, a lumen, and an outer surface; and an outer tube disposed slidably over the inner tube, the outer tube having a distal end for pushing suture, a proximal end, and a lumen receiving the inner tube, wherein the distal end of the outer tube and the outer surface of the inner tube cooperate to prevent passage of suture between the inner tube and the outer tube when the outer tube is advanced toward the distal end of the inner tube to advance a loop of suture along the outer surface of the inner tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of tying a knot using a knot pusher having a cannulated inner tube and an outer tube having a distal end slidably disposed over the inner tube, the method comprising the steps of:
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introducing a length of suture material through the cannulated inner tube, a free end of the suture extending beyond the distal end of the inner tube; forming a half hitch loop around the cannulated inner tube with the free end of the suture material; contacting the half hitch loop with the distal end of the outer tube; holding tissue with the distal end of the inner tube; and advancing the outer tube along the inner tube to push the half hitch distally along the inner tube with the distal end of the outer tube to form a knot. - View Dependent Claims (14, 15, 16)
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17. A method of tying a knot using a knot pusher having a cannulated inner tube having a distal end and an outer tube slidably disposed over the inner tube, the method comprising the steps of:
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introducing a length of suture material through the cannulated inner tube, leaving a free end of the suture extending beyond the distal end of the inner tube; forming a post with the free end of the suture; forming a first half hitch loop around the post with the free end of the suture material; contacting the first half hitch loop with the distal end of the inner tube; and advancing the inner tube along the post to push the first half hitch loop distally along the post using the distal end of the inner tube to form a knot. - View Dependent Claims (18, 19, 20)
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Specification