SYSTEM AND METHOD FOR MEASURING CONTACT IMPEDANCE OF AN ELECTRODE

An apparatus and method that determines a quality of a connection of an electrode to a patient is provided. The apparatus includes at least three electrodes selectively connected to a patient for sensing an electro-physiological signal representing a patient parameter. A current source is connected to each of the at least three electrodes, the current source able to apply both a positive current and a negative current. A control processor is connected to the current source and the at least three electrodes. The control processor identifies a number of unique electrode pairs of the at least three electrodes and controls the current source to simultaneously apply a positive current to one electrode and a negative current to an other electrode of each identified electrode pair to determine a connection quality for at least one of the at least three electrodes.