Abstract
In order to introduce Electroureterography-through-cystoscope into the clinical urology, three types of electrodes were produced: ‘simple’, ‘bridge type’ and ‘U-loop’ collar electrodes. Experiments were performed with the electrodes on both animal and human subjects. 1) Satisfactory electro-ureterogram (E. U. G.) was recorded with all three types of electrodes in canine ureter. 2) E. U. G. recording with ‘simple’ and ‘bridge type’ failed in human subjects. 3) With ‘U-loop’ electrode E. U. G. was recorded satisfactorily in both human and canine ureters. The wave pattern was similar to those by Sleator and Butcher, and Shiratori et al. The action potentials measured were 0.4-1.2 mV in amplitude with an average of 0.73 mV; 0.53-1.0 sec. in duration, average 0.70 sec.; 6.8-57.5 sec. in discharge interval, average 19.3 sec.; 22.2-33.3mm/sec. in conduction velocity, average 31.1mm/sec.
