Multiple RF return pad contact detection system

A method for adaptive impedance monitoring of at least one patient return pad configured for contacting a patient and transmitting electrosurgical energy back to an electrosurgical generator, the method comprising the steps of: selecting a desired impedance range having a lower limit and an upper limit; recording impedance of at least one patient return pad to obtain an instantaneous impedance value; determining whether the instantaneous impedance is within the impedance range; updating the upper limit as a function of the instantaneous impedance value according to the determination of the determining step; and monitoring the impedance of the at least one patient return pad to determine if the impedance is between the lower limit and the updated upper limit.