Initial observation of the urodynamic pressure flow study — characteristics of bladder-neck or prostate median lobe dynamics during micturition

Abstract

Purpose: We present our observations of a urodynamic pressure flow study graph pattern that may be associated with bladder neck hypertrophy or prostate median lobe enlargement. Materials and Methods: We report 23 male patients with signs and symptoms of lower urinary tract dysfunction who underwent urodynamic testing with pressure flow study analysis. We recognized an unusual pressure flow plot curve and found that these patients had cystoscopic evidence for bladder neck hypertrophy or cystoscopic or ultrasound evidence for prostate median lobe enlargement. Results: The patients here demonstrated showed a pattern of increasing detrusor pressure on the pressure flow study — graph phase after maximum of flowrate, where a decreasing pressure pattern is expected. We contemplated that his pattern may show how bladder outflow dynamics is affected by the anatomical features of these patients and how patients may have symptoms of LUT dysfunction or significant residual urine despite a relatively good maximum flow rate. Conclusion: We present a not previously described variation of the pressure flow study graph pattern common in men with prostatic hyperplasia, in a series of patients with median lobe prostatic hyperplasia and or hypertrophy of the bladder neck.