Non-stick coated electrosurgical instruments and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-11969204-B2
Application number	US-202117492869-A
Country	US
Kind code	B2
Filing date	Oct 4, 2021
Priority date	Oct 29, 2015
Publication date	Apr 30, 2024
Grant date	Apr 30, 2024

Abstract

An end effector assembly for use with an electrosurgical instrument is provided. The electrosurgical instrument includes a handle having a shaft that extends therefrom, an end effector disposed at a distal end of the shaft, at least one electrode operably coupled to the end effector and adapted to couple to a source of electrosurgical energy, a chromium nitride coating covering at least a portion of the electrode, and a hexamethyldisiloxane plasma coating covering at least a portion of the chromium nitride coating.

First claim

What is claimed is:

1. A surgical instrument, comprising:
a shaft;
an end effector disposed adjacent a distal end of the shaft, the end effector including a support base and an electrode coupled to the support base, at least a portion of the electrode including a chromium nitride coating; and
a hexamethyldisiloxane plasma coating covering the support base and at least a portion of the electrode having the chromium nitride coating.

2. The surgical instrument according to claim 1 , wherein the end effector includes a pair of opposing jaw members, at least one of the jaw members including an electrical jaw lead, the electrode coupled to the electrical jaw lead.

3. The surgical instrument according to claim 1 , wherein at least a portion of the electrode is formed of stainless steel and wherein the hexamethyldisiloxane plasma coating is disposed over at least a portion of the stainless steel.

4. The surgical instrument according to claim 3 , further comprising an electrically insulative layer disposed on at least a portion of an underside of the stainless steel of the electrode.

5. The surgical instrument according to claim 4 , wherein the electrically insulative layer is formed from a material selected from the group consisting of a polyimide, polycarbonate, and polyethylene.

6. The surgical instrument according to claim 1 , wherein the chromium nitride coating covers at least a portion of the electrode at varying thicknesses along a length thereof.

7. An end effector assembly, comprising:
a jaw member including a support base and a sealing plate coupled to the support base;
a chromium nitride coating disposed on at least a portion of the jaw member; and
a hexamethyldisiloxane plasma coating disposed on the support base and at least a portion of the sealing plate having the chromium nitride coating.

8. The end effector assembly according to claim 7 , wherein the jaw member includes a stainless steel layer.

9. The end effector assembly according to claim 8 , wherein the chromium nitride coating is disposed on at least a portion of the stainless steel layer.

10. The end effector assembly according to claim 8 , further comprising an electrically insulative layer disposed on at least a portion of an underside of the stainless steel layer.

11. The end effector assembly according to claim 10 , wherein the electrically insulative layer is formed from a material selected from the group consisting of a polyimide, polycarbonate, and polyethylene.

12. The end effector assembly according to claim 8 , wherein at least a portion of the sealing plate includes the stainless steel layer.

13. The end effector assembly according to claim 12 , wherein the support base is free from direct contact with the stainless steel layer.

14. The end effector assembly according to claim 7 , wherein the jaw member includes a support base and an insulative housing disposed around the support base, wherein the hexamethyldisiloxane plasma coating is disposed on the sealing plate and the insulative housing.

15. A method of manufacturing a surgical instrument, comprising:
applying a chromium nitride coating to at least a portion of an electrode;
coupling the electrode to a support base of the surgical instrument; and
applying a hexamethyldisiloxane plasma coating to the support base and at least a portion of the electrode having the chromium nitride coating.

16. The method according to claim 15 , further comprising forming the electrode by stamping the electrode from a sheet of stainless steel.

Assignees

• Covidien Lp

Inventors

• Sartor Joe D
• Robinson William E
• Boucher Todd W

Classifications

• A61B18/1445 Primary

  at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod · CPC title

• A61B18/1442

  Probes having pivoting end effectors, e.g. forceps · CPC title

• A61B2018/0013

  non-sticking · CPC title

• A61B2018/00345

  Vascular system · CPC title

• A61B2018/0063

  Sealing · CPC title