ENDOSCOPIC HIGH-FREQUENCY HEMOSTATIC FORCEPS

• US 20120101501A1
• Filed: 11/13/2009
• Published: 04/26/2012
• Est. Priority Date: 05/15/2008
• Status: Active Grant

• Current Assignee: Kaneka Corporation, River Seiko Corporation (Seiko Group)
• Original Assignee: Sumitomo Bakelite Company Limited
• Inventors: Nishimura, Miyuki, Nishimura, Makoto
• Granted Patent: US 9,186,204 B2
• Time in Patent Office: Days
• US Class Current: 606/52
• CPC Class Codes: A61B 17/29 Forceps for use in minimally invasive surgery
• CPC Class Codes: A61B 18/1442 Probes having pivoting end effectors, e.g. forceps
• 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 2018/00083 low, i.e. electrically insulating
• CPC Class Codes: A61B 2018/00589 Coagulation
• CPC Class Codes: A61B 2018/00595 Cauterization

Abstract

A hemostatic forceps (20) includes a pair of forceps elements (forceps cups (1)) constituted of a conductive metal and configured to serve as high-frequency electrodes and configured to be able to change into a state where front portions of the pair of forceps cups (1) are open, and a state where the pair of forceps cups (1) are close. A sawtooth portion (15) having a plurality of concavo-convex structures which constitute a sawtooth-shape is provided on at least one of respective closing-side surfaces (17) of the pair of forceps cups (1). The sawtooth portion (15) is provided with an electrically insulative coating over its bottom portion (21), but not on a top portion (22) thereof, and hence the top portion (22) is conductive.

Claims

1. An endoscopic high-frequency hemostatic forceps including a pair of forceps elements constituted of a conductive metal so as to serve as a high-frequency electrode, and configured to be able to freely change into a state where front portions of the pair of forceps elements are open, or a state where the pair of forceps elements are close, the hemostatic forceps comprising:

a sawtooth portion having a plurality of concavo-convex structures which constitute a sawtooth-shape formed on at least one of the respective opposing closing-side surfaces of the pair of forceps elements,

wherein a bottom portion of the sawtooth-shape of the sawtooth portion is provided with an electrically insulative coating, and a top portion of the sawtooth-shape of the sawtooth portion is not provided with the electrically insulative coating but conductive.

2. The endoscopic high-frequency hemostatic forceps according to claim 1,

wherein the top portion of the sawtooth-shape of the sawtooth portion is formed in a planar shape, and the sawtooth portion is provided with the electrically insulative coating except for the top portion.

3. The endoscopic high-frequency hemostatic forceps according to claim 1,

wherein the sawtooth portion is not provided on a front edge portion of the closing-side surface.

4. The endoscopic high-frequency hemostatic forceps according to claim 3,

wherein the front edge portion of the closing-side surface is not provided with the electrically insulative coating and is conductive.

5. The endoscopic high-frequency hemostatic forceps according to claim 3,

wherein the front edge portion of the closing-side surface is provided with the electrically insulative coating.

6. The endoscopic high-frequency hemostatic forceps according to claim 1,

wherein the sawtooth portion is formed on the front edge portion of the closing-side surface.

7. The endoscopic high-frequency hemostatic forceps according to claim 1,

wherein the pair of forceps elements each includes the sawtooth portion formed on the respective closing-side surfaces, such that top portions of the respective sawtooth portions of the pair of forceps elements confront each other when the pair of forceps elements are closed.

8. The endoscopic high-frequency hemostatic forceps according to claim 1,

wherein the pair of forceps elements each includes the sawtooth portion formed on the respective closing-side surfaces, such that the respective sawtooth portions of the pair of forceps elements are engaged with each other when the pair of forceps elements are closed.

9. The endoscopic high-frequency hemostatic forceps according to claim 1,

wherein the pair of forceps elements each includes an opening formed on the respective closing-side surfaces, and an inner surface of the opening is not provided with the electrically insulative coating, and is conductive.

10. The endoscopic high-frequency hemostatic forceps according to claim 1,

wherein the pair of forceps elements each includes the sawtooth portion formed on the respective closing-side surfaces, and the pair of forceps elements electrically connected to each other and serves as a monopolar high-frequency electrode.