Before the paddle is used , a gel must be applied to the patient 's skin , in order to ensure a good connection and to minimize electrical resistance , also called chest impedance -LRB- despite the DC discharge -RRB- .

Before the paddles are used , gel must be applied to the patient 's skin so that there is a good connection and to minimise electrical resistance , also called chest impedance -LRB- despite the direct current discharge -RRB- .
