Bladder outlet obstruction index, bladder contractility index and bladder voiding efficiency: three simple indices to define bladder voiding function

The consultations sponsored by the WHO have indicated the confirmed value of urodynamics for the precise definition of lower urinary tract dysfunction in men [1]. In the older man it is generally accepted that the outcome of outlet tract surgery (e.g. TURP) is improved if patients with BOO are selected by urodynamic studies [2]. Most analytical work has concentrated on defining BOO from pressure-flow studies of voiding, and three well-known nomograms have been used to categorize Qmax (mL/s) 25 p d et Q m ax ( cm H 2 O )