length of the ureter this results in movement of the anatomy that can then be visualized by the surgeon even if the ureter is obscured by other tissues e g scar tissue in this way the location of the ureter can be identified or confirmed so that it may be avoided during the surgical procedure note that the electrical stimulator does not need to be positioned directly on the ureter in order to achieve ureter stimulation it simply needs to be placed close enough to the ureter that the low level electrical current reaches the ureter in one form of the present invention the electrical stimulator comprises a probe component comprising electrodes and a power supply component housed in a base unit with the probe component being connected to the power supply component with an external cable i e a u201c modular construction u201d in another form of the present invention the power supply component is carried by the probe component and the external cabling can be omitted i e an u201c integrated construction u201d more particularly in one preferred form of the present invention and looking now at fig1 and 2 there is provided a novel electrical stimulator 5 which.