[Post-voiding contraction: evidence and characterization in other 250 urodynamic studies]

We report our experience on PVC detection in 250 consecutive urodynamic evaluations in female patients. We emphasize the absence of evident correlations between the post-voiding contractions (PVCs) and their amplitude and the urodynamic features. We suggest a possible relation between the PVCs and two clinical features: enuresis (80% of cases associated with PVC) and mixed urinary incontinence (61.5%). Defining PVC as an improper form of detrusor instability, probably generated by a reduction of pelvic muscle tone, we underline the role performed by an urodynamic investigation defining urethral sphincter as well pelvic floor activity, this procedure being justified by the notorious interdependence between perineal and detrusorial activity.