A Microprocessor controlled Relay is between and in series with the Electro-Surgical Unit and the NiCr loop, to control the output power of the E.S.U. during the operation of Transurethral Resection. The predetermined parameters may input to the Microprocessor for precision control of the E.S.U.. A current...http://www.google.co.uk/patents/US4651280?utm_source=gb-gplus-sharePatent US4651280 - Electrosurgical control system using tissue conductivity
