Nerve monitoring during electrosurgery

A signal processing module for a nerve integrity monitoring system adapted to sense electrical signals from a patient during operation of an electrosurgical unit and/or surgical metal-to-metal artifacts, the signal processing module comprising:

• an input module electrically coupled to a plurality of sensing probes and adapted to simultaneously receive a plurality of input signals from each of the plurality of sensing probes, a first input signal of the plurality of input signals indicative of electromyographic (EMG) activity of the patient and a second input signal of the plurality of input signals indicative of an artifact of metal-to-metal contact;
• an EMG detection module coupled to the input module and adapted to detect conditions in the first input signal and classify the conditions as a function of a level of EMG activity received from the patient;
• an artifact detection module adapted to detect the artifact in the second signal;
• and
• an output module coupled to the EMG detection module and the artifact detection module and adapted to simultaneously provide a first output signal indicative of the detected conditions in the first input signal and provide a second output signal indicative of the artifact.