By means of a simple surgical procedure, a gauged partial obstruction of the ureter has been obtained in 15 rabbits. A newly development amplifier was used to produce electromyograms free of disturbances by cardiac current (ECG) or other electrical influences, such as alternating current and switch impulses (e.g. beepers of a paging system). Single and summary potentials were received with two different electrodes (glas-isolated gold electrodes and polarisible steel electrodes). The potentials of the obstructed and non-obstructed ureter were related to the simultaneously registered peristaltic waves of the ureter. The results give support to the theory of a myogenic release of the peristalsis proceeding from cephaled to caudad. The spreading ureteral stimulation exerted by the urinary bolus transported towards the bladder is relevant in this respect.

Keywords:
Electromyography, Ureteral obstruction, New amplifier, Electrodes, Potentials, Peristaltic waves
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© 1973 S. Karger AG, Basel
1973
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