TEMPERATURE CONTROLLED RF COAGULATION

摘要

Radiofrequency medical devices for ohmic heating of tissue of a patient include a temperature sensor (29) earned by and in thermally conductive relationship with a thermally conductive electrode (28). The sensor (29) is connected for feedback to a control circuit (6) that modulates RF power applied to the electrode accordi ng to the signal received from the temperature sensor (29). The control circuit (6) and RF power supply alternate between two operating modes. In the first mode the RF power supply applies RF power to the electrode (28). In the second mode the control circu it (6) senses a signal from the temperature sensor (29) in the absence of RF signal. The control circuit (6) compares the signal fro m the temperature sensor (29) to a set value and modu- lates the RF power applied to the electrode (28) in accordance with the set value.