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The ThermiGen Symphony RF Generator System and the probes that are used with it are indicated - . for use in dermatological and general surgical procedures for electrocoagulation and hemostasis. - to create lesions in nervous tissue when used in combination with NeuroTherm . (previously Smith&Nephew) thermal/coagulation probes.

The Symphony RF is a 20 watt electro-thermal radio frequency (RF) generator with integral temperature and impedance feedback. The RF generator is the Smith&Nephew RF Delivery Device, unchanged and in clinical service since Feb 25, 2004 (K033981). The Symphony RF has software changes to allow for two types of electrode/hand-pieces. (1) percutaneous (existing Smith and Nephew thermal/coagulation probes, now owned and manufactured by Neurotherm, Inc.) and (2) the new transcutaneous thermal/coagulation probe, RFE-10-D. The Symphony RF generator has a user interface that displays temperature set point and actual tissue temperature, procedure time, impedance, along with system error and warning codes. The theory of operation of RF devices: The RF generator produces an oscillating electric field in the antenna (handpiece). The oscillating electrical field is transmitted to the surrounding soft tissue, causing heating of the tissue. A thermistor intrinsic to the handpiece measures this increase in temperature and in the case of the Symphony RF, a feedback loop maintains a set point temperature in the tissue.