Electro-Potential Changes in Human Urinary Bladder: A Method of Measurement

Abstract

A method for obtaining electromyograms from the normal, human urinary bladder is described. Potential changes were found to be quite constant in both rate and emf. generated, and the appearance of the wave form produced was sufficiently uniform in its characteristics to render it readily recognizable. It was observed to consist of 2 principal components referred to as the "A" and "B" waves. A precursory deflection ("a"), of low potential appeared in certain subjects, while B wave alterations ("b"), varying in both number and emf., were commonly present. Checks on the method described, by means of conventional cystometrograms, showed no marked discrepancies, and conclusions drawn from the records obtained were in essential agreement both with individual history and clinical findings. Pathologic conditions thus far observed were reflected in readily-recognizable variations from the norm.