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US5759189: Knot pusher

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Filing Information

Inventor(s) Michael C. Ferragamo · Joseph H. Sklar ·
Assignee(s) Smith & Nephew Inc. ·
Attorney/Agent(s) Fish & Richardson P.C. ·
Primary Examiner Gary Jackson ·
Application Number US8804667
Filing date 02/25/1997
Issue date 06/02/1998
Predicted expiration date 02/25/2017
U.S. Classifications 606/148  · 606/139  ·
International Classifications A61B 1704  ·
Kind CodeA
International Classifications 606139;148 ·
15 Claims, No Drawings


Abstract

A knot pusher includes a shaft with a distal nose configured for pushing a suture knot. The nose has a surface with a an open suture receiving recess. A securing member is arranged for movement between a closed position and an open position. In its closed position, the securing member at least partially covers the suture receiving recess to prevent removal of a suture therefrom. In its open position, the securing member permits removal of the suture from the suture receiving recess. An actuator moves the securing member between its open and closed positions. The securing member is arranged to slide or pivot relative to the shaft. The securing member is associated with the shaft such that an outer diameter of a distal end of the shaft is not substantially increased with the securing member in its closed position. A method of tying a suture is also described.

Independent Claims | See all claims (15)

  1. 1. A knot pusher instrument, comprising:a shaft including a distal nose configured for pushing a suture knot, a surface of said nose including an open suture receiving recess,a securing member arranged for movement between a closed position and an open position, said securing member in said closed position at least partially covering said suture receiving recess to prevent removal of a suture from said suture receiving recess, said securing member in said open position permitting removal of the suture from said suture receiving recess, andan actuator operatively coupled to said securing member for moving said securing member between said open and closed positions.
  2. 11. A knot pusher instrument, comprising:a shaft including a distal nose configured for pushing a suture knot, a surface of said nose including an open suture receiving recess, said shaft including first and second distal, axially directed, slots,a securing member including a first mounting arm positioned in said first slot and a second mounting arm positioned in said second slot such that said securing member is axially slidable relative to said shaft between a closed position and an open position, said securing member in said closed position covering a proximal section of said suture receiving recess to prevent removal of a suture from said suture receiving recess, said securing member in said open position permitting removal of the suture from said suture receiving recess, andan axially moveable actuator connected to said securing member for moving said securing member between said open and closed positions.
  3. 12. A knot pusher instrument, comprising:a shaft including a distal nose configured for pushing a suture knot, a surface of said nose including an open suture receiving recess,a securing member including a proximal extension having a first pivot connector attaching said securing member to said shaft such that said securing member is pivotable relative to said shaft between a closed position and an open position, and a side extension which, with said securing member in said closed position, at least partially covers said suture receiving recess to prevent removal of a suture from said suture receiving recess, said securing member in said open position permitting removal of the suture from said suture receiving recess, andan actuator attached to a second pivot connector of said securing member for moving said securing member between said open and closed positions.
  4. 13. A knot pusher instrument, comprising:a shaft including a distal nose configured for pushing a suture knot, a surface of said nose including an open suture receiving recess, anda securing member operatively coupled to said shaft and arranged for movement between a closed position and an open position, said securing member in said closed position preventing removal of the suture from said suture receiving recess, said securing member in said open position permitting removal of the suture from said suture receiving recess, said securing member being associated with said shaft such that an outer transverse diameter of a distal end of said shaft is not substantially increased with said securing member in its closed position.
  5. 14. A method of tying a suture, comprising the steps of:a) tying two free ends of a suture into a first half-knot,b) placing said two free ends into a suture receiving recess of a knot pusher instrument,c) securing the suture, at said recess, for slidable movement,d) tying the two free ends of the suture into a second half-knot, and thereaftere) advancing said instrument to push the first half-knot against tissue being sutured while tensioning said two free ends,f) retracting said instrument,g) releasing said suture from said recess,h) repositioning said instrument proximally of said second half-knot,i) securing the suture, at said recess, for slidable movement, andj) advancing said instrument to push the second half-knot against the first half-knot,said tensioning on said two free ends being maintained during steps e through j.
  6. 15.15. A method of tying a suture, comprising the steps of:tying two free ends of a suture into a half-knot,placing said two free ends into a suture receiving recess of a knot pusher instrument,securing the suture, at said recess, for slidable movement by moving a securing member from an open position to a closed position, said step of securing substantially maintaining a transverse outer diameter of a distal end of said instrument, andadvancing said instrument to push the half-knot against tissue being sutured.

References Cited

U.S. Patent Documents

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Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
SU305885Mar 1970
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Other Publications

Bartlett, "Principles of Knot Delivery in Intra-Articular Suturing For Arthroscopic Procedures", American Journal of Arthroscopy, 1:13-15.
Jenson, "Review of Present Treatments for Torn Menisci and Design of New Arthroscopic. . . ", Massachusetts Institute of Technology, 49-51.
"Arthrex Arthroscopy Knot Pusher", Arthrex Brochure, 1991.

Referenced By

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Patent Family

Document NumberAssigneeInventorsIssue/Pub Date
US5759189 Smith & Nephew Inc. Michael C. Ferragamo et al. Jun 1998
AU6661498 SMITH & NEPHEW INC FERRAGAMO MICHAEL C et al. Sep 1998