A method for detecting cystic fibrosis is disclosed, which is performed in a system comprising an anode and a cathode placed on different regions of the patient body, and an adjustable DC source, which is controlled in order to feed the anode with a DC current. The method includes applying DC voltage pulses of varying voltage values to the anode for given durations allowing the stabilization of electrochemical phenomena in the body in the vicinity of the electrodes, collecting data representative of the current between the electrodes, and of the potentials of the electrodes, for the different DC voltages, and from the data, computing data representative of the electrochemical skin conductance of the patient, and reconciling the latter data with reference data obtained in the same conditions on patients suffering or not from cystic fibrosis, and identifying the patient as suffering or not from cystic fibrosis.
