Electrosurgical instrument with conductive ceramic or cermet...

A - Human Necessities – 61 – B

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A61B 18/14 (2006.01)

Patent

CA 2258026

This invention is an electrosurgical instrument including an active electrode surface (5) made of a conducting ceramic or cermet. The conducting ceramic may be a carbide, boride, or nitride ceramic or a mixture of these ceramics. The cermet may include a ceramic and a metal selected from the group consisting of cobalt, nickel, iron, molybdenum, titanium, zirconium, and aluminum. The conducting ceramic or cermet active electrode surface may be supported on a core. In some embodiments, the core is a metal core with the active electrode surface formed as a coating on a surface of the metal core. In other embodiments, the core is made of electrically insulating material. Somme embodiments of the invention are Bovie blades, bipolar forceps, cauterizing end effectors for endoscopic surgery, bipolar biopsy devices, and spatula blades having the inventive active electrode surface.

L'invention concerne un instrument électrochirurgical comprenant une surface électrode active (5), constituée d'une céramique conductrice ou d'un cermet. La céramique conductrice peut être une céramique à base de carbure, de borure ou de nitrure, ou encore un mélange de ces céramiques. Le cermet peut comprendre une céramique et un métal choisi entre le cobalt, le nickel, le fer, le molybdène, le titane, le zircon et l'aluminium. La surface électrode active en céramique conductrice ou en cermet peut être soutenue par une âme. Dans certains modes de réalisation, l'âme est en métal, la surface électrode active formant un revêtement sur une surface de l'âme métallique. Dans d'autres cas, l'âme est constituée d'une isolant électrique. Des instruments selon l'invention peuvent être des lames de Bovie, des pinces bipolaires, des effecteurs de cautérisation pour la chirurgie endoscopiques, des instruments de biopsie bipolaires, et des lames à spatules munies de la surface électrode active selon l'invention.

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