Four-Year Outcome of a Prospective Randomised Trial Comparing Bipolar Plasmakinetic and Monopolar Transurethral Resection of the Prostate

Abstract

BackgroundNo data have been published on the midterm efficacy of bipolar transurethral resection of the prostate (TURP). ObjectiveTo evaluate 4-yr results from a prospective randomised trial comparing bipolar TURP with standard monopolar TURP. Design, setting, and participantsSeventy patients with symptomatic benign prostatic hyperplasia were enrolled in this prospective randomised controlled trial in a tertiary-care institution. Inclusion criteria were age >50 yr, good performance status, urinary retention, International Prostate Symptom Score (IPSS) ≥18, and maximal flow rate (Qmax) ≤15ml/s. Exclusion criteria were prostate volume <30cm3, documented or suspected prostate cancer, neurogenic bladder, bladder stone or diverticula, urethral stricture, and maximal bladder capacity >500ml. InterventionPatients underwent standard or bipolar plasmakinetic TURP performed by the same surgeon using the same surgical technique. MeasurementsTreatment efficacy was evaluated at 1, 2, 3, and 4 yr by comparing urinary flow rates, IPSS, and estimated postvoid residual (PVR) urine volume. Midterm complications were also recorded. Results and limitationsThe number of dropouts was not statistically significantly different in the two groups (p=0.2). The significant improvements in both groups were maintained at 4 yr for the IPSS, quality of life score, Qmax, and PVR versus baseline values. The main outcome variables at 4 yr for bipolar and monopolar TURP were mean IPSS 6.9 and 6.4 (p=0.58); mean Qmax 19.8ml/s and 21.2ml/s (p=0.44), and mean PVR volume 42ml and 45ml (p=0.3). Overall, 2 of 32 (6.2%) and 3 of 31 (9.6%) patients required reoperation because of late complications (p=0.15). The major study limitation was the small sample size. ConclusionsThis study represents the secondary, midterm analysis of a previously published trial. Our 4-yr data confirm our initial positive findings for the efficacy and safety of bipolar plasmakinetic TURP. Larger well-designed studies are needed to corroborate these findings.