Experiments were undertaken with the purpose of developing a method for synchronized recording of urometrograms and electroureterograms.
An electrode was constructed for synchronized recording of electroureterogram and urometrogram from the same region of the ureter. Electroureterography was made either by the unipolar lead or by the bipolar lead method. It was found that insertion of this electrode into the ureter did not exert any artificial effect on peristalsis of the ureter. The contraction phase was shown to be closely related to the action potential, while the pre-contraction phase merely represented secondary changes in intra-ureteral pressure which is related to urinary volume.