Bipolar coagulation forceps

• US 8,551,090 B2
• Filed: 08/31/2010
• Issued: 10/08/2013
• Est. Priority Date: 03/19/2004
• Status: Active Grant

• Current Assignee: Sutter Medizintechnik GmbH
• Original Assignee: Sutter Medizintechnik GmbH
• Inventors: Sutter, Hermann, Weitkamp, Dirk
• Primary Examiner(s): HOLWERDA, KATHLEEN SONNETT
• Application Number:
  US12/872,512
• Publication Number:
  US 20100331837A1
• Time in Patent Office: 1,134 Days
• Field of Search: 606/40, 606/41, 606 45- 52, 606205-209
• US Class Current: 606/51
• CPC Class Codes: A61B 18/1445 at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
• CPC Class Codes: A61B 2017/2945 Curved jaws
• CPC Class Codes: A61B 2018/1432 curved
• CPC Class Codes: A61B 2018/146 Scissors

Abstract

A bipolar coagulation forceps with a fixed forceps leg, a pivot support, and a pivoting forceps leg, which can pivot relative to the fixed forceps leg via a pivot element and which is electrically insulated from the fixed forceps leg is provided, with the forceps legs essentially being made from biocompatible metal. The pivot element is likewise essentially made from biocompatible metal and attaches directly to the moving forceps leg. An insulating body electrically insulating the pivot element and the moving forceps leg from the fixed forceps leg is arranged on or fixed to the fixed forceps leg as a pivot support, on which the moving forceps leg is supported by the pivot element.

Claims

1. Bipolar coagulation forceps (1) comprising:

a fixed forceps leg (2), with a pivot support (3);

a pivoting forceps leg (4), which pivots relative to the fixed forceps leg via a pivot element (11, 12) and which is electrically insulated from the fixed forceps leg, the forceps legs (2, 4) being made from biocompatible metal, the pivot element (11, 12) is divided into two parts (11, 12), which are aligned with each other and which have a slot (13) or spacing between themselves and are each supported in a receiving bearing (7b) of the pivot support (3), the receiving bearings (7b) have a slot and/or an open spacing (10a, 10b) located therebetween, the pivot element (11, 12) is made from biocompatible metal and is integral with the pivoting forceps leg (4);

an insulating body (5a, 5b) electrically insulating the pivot element (11, 12) and the pivoting forceps leg (4) from the fixed forceps leg (2), the insulating body (5a, 5b) is arranged on or fixed to the fixed forceps leg (2) as the pivot support (3), on which the pivoting forceps leg (4) is supported by the pivot element (6, 11, 12) and

a push/pull rod (8) moveable within the slot and/or open spacing (10a, 10b) located between the bearings and is attachable to the pivoting forceps leg (4) at a link position (9) eccentric to a pivot axis thereof, wherein the push/pull rod (8) engages, in a region of the link position (9), the pivoting forceps leg (4) in the slot (13) or spacing between the two parts of the pivot element (11, 12), which are approximately aligned with each other, and between the receiving bearings (7b).

2. Coagulation forceps according to claim 1, wherein the insulating body (5a, 5b) is formed in one piece, at least in a region between the link position (9) of the push/pull rod (8) and the fixed forceps leg (2).

3. Coagulation forceps according to claim 1, wherein an end of the pivoting forceps leg (4) pointing towards the insulating body (5b) has two bearing journals (11, 12) spaced apart from each other as the pivot element, the bearing journals (11, 12) are each supported in one of the receiving bearings (7b) of the pivot support (3), which is formed as the insulating body (5b).

4. Coagulation forceps according to claim 1, wherein the slot (13) or spacing between the two parts of the pivot element (6, 11, 12) is generally aligned with a longitudinal axis of the push/pull rod (8) and a longitudinal center of the slot (13) or spacing between the two parts of the pivot element (6, 11, 12) and a longitudinal center of the slot and/or open spacing (10a, 10b) between the receiving bearings (7a, 7b) of the pivot support (3), as well as the longitudinal axis of a push/pull rod (8) of the forceps, all extending in a common plane, which is arranged perpendicular to the pivot axis of the two parts of the pivot element (6, 11, 12).

5. Coagulation forceps according to claim 1, wherein the two parts of the pivot element (11, 12) of the pivoting forceps leg (4) are clipped into the receiving bearings (7a, 7b) of the insulating body (5a, 5b).

6. Coagulation forceps according to claim 1, wherein the two parts of the pivot element (11, 12) of the pivoting forceps leg (4) are integral with the pivoting forceps leg (4).

7. Coagulation forceps according to claim 1, wherein the two parts of the pivot element (11, 12) of the pivoting forceps leg (4) are connected with a positive and/or force fit to the pivoting forceps leg (4).

8. Coagulation forceps according to claim 1, wherein the insulating body is a metal part electrically insulated from the fixed forceps leg (2) and has a material layer electrically insulating the receiving bearings (7a, 7b) for the two parts of the pivot element (11, 12) from the fixed forceps leg (2).

9. Coagulation forceps according to claim 1, wherein the insulating body (5a, 5b) is made from electrically insulating material.

10. Coagulation forceps according to claim 9, wherein the insulating material is ceramic or plastic.