Videoflow: Uroflowmetry in Children Exploiting Standard Care Video Urodynamic Imaging.

Introduction: Pressure-flow study, consisting of flow rate combined with detrusor pressure, is the gold standard to determine bladder outflow obstruction and evaluate the detrusor voiding contraction. In very young children, not able to sit on a uroflowmetry device, the flow rate cannot be measured. This results in an incomplete evaluation of bladder and urethral functions.

Constrictive versus compressive bladder outflow obstruction in men: Does it matter?

Introduction: Bladder outflow obstruction (BOO) is a urethral resistance (UR) at a level above a clinically relevant threshold. UR is currently graded in terms of the existence and severity of the BOO based on maximum flowrate and associated detrusor pressure only. However, the pressure-flow relation throughout the course of voiding includes additional information that may be relevant to identify the type of BOO.

Quantifying bladder outflow obstruction in men: A comparison of four approximation methods exploiting large data samples.

Introduction: A pressure flow study (PFS), part of the International Continence Society standard urodynamic test, is regarded gold standard for the classification and quantification of the urethral resistance (UR), expressed in the bladder outflow obstruction (BOO). For men with benign prostatic hyperplasia, the minimum urethral opening pressure (p ), found at the end of the passive urethral resistance relation is considered the relevant parameter describing BOO. However, in clinical practice, direct measurements of p are easily confounded by terminal dribbling.