Terminating drying cycles by monitoring current in electrosurgical systems

A method of generating and providing controlled electrical power of a therapeutic signal to biological tissue in electrical communication with a surgical instrument, the method comprising:

• measuring an electrical parameter of the biological tissue during a therapeutic phase;
• controlling an energy delivery of the therapeutic signal provided to the biological tissue during a therapeutic phase;
• and
• in response to the measured electrical parameter of the biological tissue satisfying a predetermined value, reducing the energy delivery during the therapeutic phase, wherein the predetermined value is a threshold value that depends on a pulse count or a change in the electrical parameter relative to a measurement of the electrical parameter.

A surgical generator configured to generate and provide controlled electrical power of a therapeutic signal to biological tissue in electrical communication with a surgical instrument, the surgical generator comprising:

• a measurement circuit coupled to a control circuit and configured to measure a voltage at the biological tissue during a therapeutic phase;
• and
• the control circuit in communication with an electrical-energy source, the electrical-energy source electrically coupled to the instrument and configured to generate the therapeutic signal, the control circuit configured to:
• control an energy delivery of the therapeutic signal provided to the biological tissue during a therapeutic phase;
• and
• in response to the measured voltage at the biological tissue satisfying a predetermined value, reduce the energy delivery during the therapeutic phase,
• wherein the predetermined value is a threshold value that depends on a pulse count or a change in voltage relative to an initial voltage measurement.