22 February 2017 Corrosion and wear in plasma electrosurgical devices
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Data were previously reported on studies of the effects of electrical discharges on the corrosion and wear of simple, single-wire test devices immersed in isotonic saline 1 . This work showed that there are a wide variety of mechanisms that can explain various aspects of electrode mass loss, even with very simple electrode geometries and operating conditions. It was found that the electrode material composition played an important role. Subsequently, our studies were expanded to include more realistic device geometries and operating conditions. This paper shows the results of studies on wear characteristics of electrodes made from a variety of highly corrosion resistant metals and alloys, including Waspaloy, Hastelloy, Inconel, Havar, Monel, and other pure metals such as Hafnium. All of these metals underwent wear testing under clinically relevant conditions. Depending on the operating conditions, multiple discrete physical and chemical effects were observed at different locations on the surface of an individual millimeter-scale device electrode. Scanning electron microscope (SEM) micrographs, Energy-dispersive X-ray spectroscopy (EDS) and area loss data will be presented for a variety of test conditions and electrode materials.
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J. Gaspredes, J. Gaspredes, T. P. Ryan, T. P. Ryan, K. R. Stalder, K. R. Stalder, J. Woloszko, J. Woloszko, } "Corrosion and wear in plasma electrosurgical devices", Proc. SPIE 10066, Energy-based Treatment of Tissue and Assessment IX, 1006607 (22 February 2017); doi: 10.1117/12.2255968; https://doi.org/10.1117/12.2255968

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