B each show a side view of the distal end of an electrosurgical probe having a blade electrode, according to two different embodiments of the invention; [0057]FIGS. 37A and 37B are a side view and an end view, respectively, of an electrosurgical probe having a lumen external to the probe shaft, according to one embodiment of the invention; [0058] FIGS. 38A, and 38B are a side view and an end view,