#$%^&*AU2012244175B220131107.pdf#####VESSEL SEALING SYSTEM ABSTRACT An electrosurgical system (1) is disclosed. The electrosurgical system (1) includes an electrosurgical generator (2) adapted to supply electrosurgical energy to tissue. The electrosurgical generator (2) includes impedance sensing circuitry which measures impedance of tissue, a microprocessor configured to determine whether a tissue reaction has occurred as a function of a minimum impedance value and a predetermined rise in impedance, wherein tissue reaction corresponds to a boiling point of tissue fluid, and an electrosurgical instrument (4) including at least one active electrode (21) adapted to apply electrosurgical energy to tissue. 6810451_l:MSD
