Electrosurgical generator and system

An electrosurgical generator for generating radio frequency power, the generator comprising:

• (i) a radio frequency output stage having two or more output connections,
• (ii) a power supply coupled to the output stage for supplying power to the output stage,
• (iii) a controller operable to cause the generator to supply a blended output signal alternating constantly between a first output signal across the output connections for cutting or vaporisation of tissue, and a second output signal across the output connections for coagulation, the first and second output signals being non-zero signals, and
• (iv) adjustment means, operable by a user of the electrosurgical generator, for changing between various preset settings for the blended signal, the preset settings each having a predetermined duty cycle of the blended signal that is the first output signal, and a predetermined duty cycle of the blended signal that is the second output signal.

An electrosurgical generator for generating radio frequency power, the generator comprising:

• (i) a radio frequency output stage having two or more output connections,
• (ii) a power supply coupled to the output stage for supplying power to the output stage,
• (iii) a controller operable to cause the generator to supply a blended output signal alternating constantly between a first output signal portion across the output connections in which the radio frequency output voltage developed across the output connections is limited to at least a first predetermined threshold value for cutting or vaporisation of tissue, and a second output signal portion across the output connections in which the radio frequency output voltage developed across the output connections is limited to a second threshold value for coagulation, the first and second predetermined threshold values being non-zero values, and
• (iv) adjustment means, operable by a user of the electrosurgical generator, for changing between different preset settings for the blended signal, the preset settings each defining a different respective predetermined ratio of the proportion of time occupied by the first output signal portion and that occupied by the second output signal portion.