Suture cutter

• US 4,053,979 A
• Filed: 12/23/1975
• Issued: 10/18/1977
• Est. Priority Date: 12/23/1975
• Status: Expired due to Term

• Current Assignee: International Paper Company
• Original Assignee: International Paper Company
• Inventors: Freeborn, John O., Tuthill, Harlan L.
• Primary Examiner(s): Michell, Robert W.
• Assistant Examiner(s): Thaler, Michael H.
• Application Number:
  US05/643,667
• Time in Patent Office: 665 Days
• Field of Search: 128/305, 128/354, 128/303, 128/318, 30/179, 30/124, 30/186, 30/188, 30/238, 30/235, 81/43
• US Class Current: 606/138
• CPC Class Codes: A61B 17/0467 Instruments for cutting sutures surgical cutting instruments A61B17/32
• CPC Class Codes: A61B 17/3201 Scissors for biopsy A61B10/02
• CPC Class Codes: B26B 13/18 without joint, i.e. having blades interconnected by a resilient member

Abstract

A disposable suture cutter formed as a resilient member from a single piece of molded material having two opposed free ends to be held between the fingers and thumb. One free end is shaped for insertion in cutting position under a suture without any lateral motion. A suture-retaining groove is positioned on the insertable free end for holding the suture transverse the free end. A cutting blade is attached to the other free end of the resilient member for movement transversely and downwardly relative to the axis of the suture held in the suture-retaining groove. A guide groove is provided on the insertable free end so as to prevent lateral motion of the cutting blade as it is moved across the suture. When operated, the suture cutter slices the suture held in the groove without additional motion of the free insertable end.

Claims

1. A disposable suture cutter for slicing a suture held thereby comprising:

a resilient member including first and second elongated arms terminating respectively in first and second opposed free ends and adapted to be held between the fingers and thumb respectively, said first free end being shaped for insertion in cutting position under a suture without lateral motion;

suture retaining means carried by said first free end for holding a suture aligned transversely on said first free end including a lateral slot for seating the suture extending across the full width of the interior surface of said first free end in opposition to said second free end and inwardly of the tip of said first free end;

cutting means carried by said second free end and including a cutting blade having a longitudinally extending convex edge for slicing a suture held by said suture retaining means without lateral motion of said first free end; and

guide means on said first free end for preventing lateral motion of said cutting means including a groove extending longitudinally along a portion of the ineterior surface of said first arm and intersecting said lateral slot on said first free end, said groove of said first free end lying in aligned opposition to the cutting blade carried by said second free end, said longitudinal grove and said blade lying in a common plane substantially medially of the width of said arms,

said second arm being movable without lateral motion toward said first arm to move said cutting blade toward said first free end in a direction transverse to the axis of a suture held in said lateral slot and being deformable when bearing against said first arm to move said cutting blade longitudinally parallel to said groove through the intersection of said slot and said groove to slice the suture held by said suture retaining means when pressure is exerted to displace said second arm toward said first arm and deform said second arm against said first arm, said first and second arms having end portions opposite their free ends, a generally semi-circular section connecting said opposite end portions of said arms one to the other, said first arm being substantially planar and extending generally linearly;

said second arm having a generally linearly extending first section generally inclined away from said first arm and extending from said semi-circular section, said second arm having a generally linearly extending second section inclined inwardly from said first section toward said first arm to terminate in said second free end aligned at an acute angle to said first free end, said second section having a mounting projection with a planar surface for mounting said cutting blade;

said second section being movable transversely and downwardly relative to the axis of a suture held in said lateral slot to move said cutting edge of said blade longitudinally in a direction toward the tip of said first free end.

2. The disposable suture cutter of claim 1 wherein said planar surface of said mounting projection has at least one integrally molded boss, said cutting blade having a hole, said boss extending through said hole for mounting said blade on said boss.

3. The disposable suture cutter of claim 1 wherein said second section terminates in a tapered second free end to permit an operator to view said cutting blade as it slices the suture during operation of said suture cutter.

4. The disposable suture cutter of claim 1 wherein each of said arms has a roughened area intermediate its ends and on its exterior surface to permit said arms to be firmly grasped during operation of said suture cutter.

5. The disposable suture cutter of claim 4 wherein the roughened surface on said second arm is located on said first section for providing a grasping position of said second arm when operating said suture cutter.