Ultrasound-Estimated Bladder Weight Predicts Risk of Surgery for Benign Prostatic Hyperplasia in Men Using α-Adrenoceptor Blocker for LUTS

Objectives Although invasive and expensive, the pressure-flow study is known as the reference standard for the diagnosis of bladder outlet obstruction. We investigated the usefulness of ultrasound-estimated bladder weight (UEBW) as a predictor of the need for surgery for benign prostatic hyperplasia (BPH). Methods A total of 97 consecutive male patients >50 years old with lower urinary tract symptoms (LUTS) were prospectively enrolled in this study. The surgery rate was correlated with the UEBW, the results of uroflowmetry, the postvoid residual urine volume, prostate volume, and International Prostate Symptom Score. Results Surgery for BPH was performed in 37 of the 97 patients studied. The surgery rate was associated with a high UEBW (≥35 g), severe LUTS (International Prostate Symptom Score of ≥20), a voided volume of