Medical knot pusher

• US 7,717,927 B2
• Filed: 03/08/2007
• Issued: 05/18/2010
• Est. Priority Date: 03/08/2006
• Status: Active Grant

• Current Assignee: Karl Storz Se & Co. Kg
• Original Assignee: Karl Storz Se & Co. Kg
• Inventors: Kreidler, Bodo, Hahn, Martin
• Primary Examiner(s): Erezo; Darwin P
• Assistant Examiner(s): Templeton; Christopher L
• Application Number:
  US11/683,457
• Publication Number:
  US 20070213746A1
• Time in Patent Office: 1,167 Days
• Field of Search: 606/148, 606/139, 606/144, 606/159, 289/2, 289/17, 289/18.1
• US Class Current: 606/148
• CPC Class Codes: A61B 17/0467 Instruments for cutting sutures surgical cutting instruments A61B17/32
• CPC Class Codes: A61B 17/0469 Suturing instruments for use in minimally invasive surgery, e.g. endoscopic surgery
• CPC Class Codes: A61B 2017/00353 one mechanical instrument performing multiple functions, e.g. cutting and grasping channel for multiple instruments A61B2017/3445; instrument channel A61B2017/22072; replaceable heads A61B2017/2931; suction A61M1/00
• CPC Class Codes: A61B 2017/0474 Knot pushers
• CPC Class Codes: A61B 90/03 Automatic limiting or abutting means, e.g. for safety

Abstract

The invention relates to a medical knot pusher having a shaft, a handle on the proximal end of the shaft, and a guide device on the distal end of the shaft, for holding and guiding surgical sewing material, as well as with an additional cutting device positioned on the shaft for severing the surgical sewing material positioned in the guide device. A medical knot pusher, which is both simple to operate and has a range of uses, is characterized according to the invention in that the shaft consists of a shaft tube that contains the guide device for the surgical sewing material and is positioned in the handle, as well as a cutting tube that can be mounted on the shaft tube and constitutes the cutting device.

Claims

1. A medical knot pusher having a shaft, a handle on a proximal end of the shaft, and a guide device on a distal end of the shaft for holding and guiding surgical sewing material, as well as an additional cutting device positioned on the shaft for severing the sewing material positioned in the guide device, wherein the shaft being positioned in the handle consists of a shaft tube comprising the guide device for the surgical sewing material, and a cutting tube being mounted on the outside of the shaft tube forming the cutting device, characterized in that at least one cutting edge is positioned on the distal end of the cutting tube, wherein the at least one cutting edge is configured on a distal end of a freely cut spring latch, which is set free elastically by two parallel incisions in the cutting tube that extend toward the proximal end, with said spring latch being pretensioned radially inward in the direction toward the shaft tube, and in that a clamping rod inserted into the shaft tube for securing the sewing material in the guide device.

2. A medical knot pusher according to claim 1, characterized in that the cutting tube is positioned on the shaft tube so that it can be moved relative to the shaft tube in an essentially axial direction.

3. A medical knot pusher according to claim 2, characterized in that the cutting tube is positioned on the shaft tube so that it can slide axially by means of an actuation mechanism positioned on the handle.

4. A medical knot pusher according to claim 3, characterized in that the actuating mechanism is configured as a sleeve that is positioned coaxially on the shaft tube and includes a coupling element for securing the cutting tube as well as a pusher for moving the cutting tube.

5. A medical knot pusher according to claim 4, characterized in that the pusher can be blocked at least in an end position.

6. A medical knot pusher according to claim 1, characterized in that the guide device for the surgical sewing material is configured as a groove that proceeds from a free distal end of the shaft tube and that comprises at least one groove segment running in the proximal direction as well as a groove segment connected with it and running in tangential direction.

7. A medical knot pusher according to claim 6, characterized in that a second groove segment, this time extending in the axial direction, connects with the groove segment running in the tangential direction.

8. A medical knot pusher according to claim 7, characterized in that in a distal end of the clamping rod a groove is configured that runs in the longitudinal direction of the clamping rod and that, when inserted in the shaft tube, is flush with the second groove segment of the guide device running in the axial direction.

9. A medical knot pusher according to claim 6, characterized in that the at least one cutting edge works together with at least one groove segment of the guide device to sever the surgical sewing material.