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Evaluation of micturition.

The urodynamic measurement of micturition, the process of voiding, is combined with the filling cystometrogram to provide a comprehensive evaluation of bladder function. Two voiding studies, uroflowmetry and the voiding pressure test, provide data about the detrusor contraction, urethral sphincter mechanism response, and urinary outflow. With careful interpretation, these data provide insight into the disorders of micturition that cause urinary retention and its complications. This discussion reviews complex urodynamic techniques used to perform and evaluate bladder evacuation.