Improvement in Uroflowmetry Parameters After Transurethral Resection of Prostate for Bladder Outlet Obstruction in Benign Prostatic Hyperplasia

Abstract

Benign prostatic hyperplasia (BPH) commonly causes bladder outlet obstruction and lower urinary tract symptoms in older men. Transurethral resection of the prostate (TURP) is a standard surgical option, but the outcome should be assessed objectively. Objectives: To determine changes in uroflowmetry parameters and International Prostate Symptom Score (IPSS) after TURP in BPH. Methods: This prospective before-and-after interventional study was conducted at the Multan Institute of Kidney Diseases, Multan, from February to May 2026. Forty-five consecutive men undergoing TURP for BPH were enrolled. Qmax, Qavg, voided volume, voiding time, time to maximum flow, post-void residual urine (PVR), and IPSS were recorded before surgery and four weeks postoperatively. Paired t-test and McNemar test were applied. Results: Mean age was 67.98 ± 7.18 years, and mean prostate volume was 65.87 ± 17.16 mL. After TURP, Qmax increased from 8.08 ± 1.58 to 19.87 ± 2.35 mL/s and Qavg from 4.32 ± 0.84 to 10.64 ± 1.57 mL/s. PVR decreased from 157.69 ± 41.90 to 37.16 ± 16.10 mL, and IPSS from 24.13 ± 3.96 to 8.20 ± 2.35. All changes were significant (p<0.001). Severe IPSS category decreased from 36 (80.0%) cases to 0, and all patients converted from obstructed to normal flow patterns. Conclusions: TURP significantly improved flow parameters, residual urine, symptom severity, and flow pattern. Uroflowmetry with IPSS is useful for postoperative assessment.