An electro-nerve stimulation apparatus includes a pulse generator, a first electrically conductive, insulated lead wire, a second electrically conductive, insulated lead wire, an electrically conductive transcutaneous electrode and an electrically conductive percutaneous needle electrode. Connected to one end of the first and second lead wires is a connector for electrically coupling with the pulse generator. The transcutaneous electrode is operably connected to the other end of the first lead wire. An electrically conductive adaptor is secured to the other end of the second lead wire for electrically coupling to the terminal end of the percutaneous needle electrode. The lead wire set includes a single-use mechanism adapted to effectively discourage reuse of the electrodes. In use, the transcutaneous electrode is adhered to the patient's skin distal from the desired internal stimulation site. The percutaneous needle electrode is inserted through the skin in proximity to the desired internal stimulation site. The pulse generator is activated to pass current pulses between the transcutaneous electrode and the percutaneous needle electrode through the internal stimulation site.