Role of Bladder Emptying on Outcomes of Transurethral Resection of the Prostate.

To assess the role of bladder emptying on outcomes of males undergoing transurethral resection of the prostate (TURP). This prospective study involved candidates for TURP (January 2017-2018) with a follow-up of 3 years. Preoperative and follow-up evaluation comprised: UF, simple PVR (S-PVR), PVR-Ratio (PVR-R) as the ratio of PVR to bladder volume (BV: voided volume (VV) + PVR), Bladder voiding efficiency (BE) as the ratio between VV and BV -(voided volume/total bladder capacity) × 100 - and the IPSS. Patients were stratified for S-PVR, PVR-R, and BVE. Patients recruited were 100 (mean ± SD age: 68.8 ± 8.7 years). No patient had severe complications, re-admission, nor needed blood transfusion. At baseline, 38% of the patients showed S-PVR ≤ 50 mL, 62% a S-PVR ≤ 100 mL, and 25% a S-PVR >150 mL. In both pre- and postoperative evaluation there were no significant differences in Qmax and IPSS score among the groups. In each group we found a significant improvement in Qmax, IPSS score, and S-PVR, PVR-R and BVE after TURP (except for PVR in group with lowest preoperative S-PVR). Analysing a preoperative S-PVR threshold >100 mL, PVR-R significantly increased, and BVE significantly decreased after TURP. Conversely, when preoperative S-PVR was >100 mL, PVR-R, and BVE relevantly but non significantly improved after surgery. Bladder emptying is only partially related to TURP outcomes and other preperative parameters. Patients with baseline S-PVR lower than 100 mL had the chance of greater recovery of bladder emptying after TURP.

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