Tissue charring during radio frequency (RF) therapy causes an impedance rise and prevents further tissue heating from occurring. Charring can be exacerbated by electrochemical surface heating at electrode/tissue interfaces. Using electrode materials that have equal surface and bulk heating rates would be ideal to obtain maximum bulk heating before the onset of charring.

Here we compare the surface-to-bulk heating characteristics of silver/silver chloride (Ag/AgCl), platinum (Pt), and stainless steel (SS) during RF energy application in an effort to determine which material is best suited for RF ablation therapies.

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