Terminating a pulse based upon measurements taken within the pulse in electrosurgical systems

A surgical generator configured to generate and provide controlled electrical power of an electrotherapeutic 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 for performing a reference measurement after a time interval following commencement of a therapeutic phase;
• and
• the control circuit in communication with an electrical-energy source, the electrical-energy source electrically coupled to the surgical instrument and configured to generate the electrotherapeutic signal, the control circuit configured for:
• selecting, following commencement of the therapeutic phase and based on the reference measurement, a termination criterion from a plurality of termination criteria for the therapeutic phase;
• delivering the electrotherapeutic signal to the biological tissue during the therapeutic phase, the delivered electrotherapeutic signal controlled according to an electrotherapeutic plan;
• and
• terminating the therapeutic phase in response to the termination criterion being met.

A surgical generator configured to generate and provide controlled electrical power of an electrotherapeutic 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 for measuring a first reference impedance of the biological tissue after a time interval following commencement of a desiccation phase;
• and
• the control circuit in communication with an electrical-energy source, the electrical-energy source electrically coupled to the surgical instrument and configured to generate the electrotherapeutic signal, the control circuit configured for:
• determining a first termination criterion for the desiccation phase based on the measured first reference impedance following commencement of the desiccation phase;
• delivering a first electrotherapeutic signal to the biological tissue during the desiccation phase, the delivered first electrotherapeutic signal controlled according to an electrotherapeutic plan;
• terminating the desiccation phase in response to the first termination criterion being met;
• measuring a second reference impedance of the biological tissue following termination of the desiccation phase;
• determining a second termination criterion for a vessel welding phase based on the measured second reference impedance prior to commencement of the vessel welding phase;
• delivering a second electrotherapeutic signal to the biological tissue during the vessel welding phase;
• and
• terminating the vessel welding phase in response to the second termination criterion being met.