Disposable electrosurgical probes for treating tissue, and surgical procedures that make use of such probes. Such a probe includes a working element, an elongate sheath secured to the working element, and a core member within the sheath. At least one active electrode and conductor are disposed in a first of a plurality of internal longitudinal channels within the core member. The electrode is adapted to extend from a distal end of the sheath and configured to perform cutting, coagulation, or ablation of tissue with radio frequency current. The probe further includes a fluid passage defined by at least a second of the internal longitudinal channels within the core member. At least the working element, the sheath, and the core member are formed of a disposable material.
