The instant invention provides an apparatus, a kit and a method for treating a tumor in an extremity of a patient. The electric motor comprises a self-starting type electric motor having a rotor, which comprises a cage conductor and a polarized permanent magnet, and the inverter device comprises a plurality of semiconductor switches for controlling drive frequencies of the electric motor. The method of fabricating the thin-film device comprises the step of providing an active material that has bulk material properties. The high-voltage component may then compress around the cable, with a uniform layer of lubricant remaining in between interior cavity of the high-voltage component and the outer layer of the cable. A rotor has an output shaft which passes through a central region of the core.