The present study protocol was reviewed and approved by the Ethics Committee of National Hospital Organization Okayama Medical Center (approval no. 2021-039). Informed consent was obtained using the opt-out method. The study procedures were conducted in accordance with the Declaration of Helsinki.
For this retrospective study, we evaluated the medical records of patients who underwent radical prostatectomy for prostate cancer treatment at our institution between November 2015 and March 2021. The surgical procedures performed were laparoscopic radical prostatectomy (LRP) and retropubic radical prostatectomy (RRP). In patients who underwent LRP or RRP, urethral catheters were removed 6 days after surgery. In cases where the patient had diabetes mellitus or the leak test during surgery showed leakage from the vesicourethral anastomosis, urethral catheters were removed only after an evaluation by cystourethrography 6 days after surgery. If the cystourethrography showed leakage, removal of the catheter was postponed. In cases where the patient showed urinary retention after catheter removal, the catheter was placed again. After catheter removal, patients themselves recorded urine volume per voiding. The leak urine volume was calculated using the volume of safety pads. We defined the ULR as the percentage of the leaked urine volume relative to the total urine volume in a 24-hour period, from 24:00 midnight on the day of catheter removal to 24:00 midnight the following day.
The following patients were excluded from the analysis: cases in which the leaked urine volume data was not recorded, those in which the urethral catheter removal was not performed as scheduled, and those who had preoperative urinary incontinence.
For this retrospective study, we evaluated the medical records of patients who underwent radical prostatectomy for prostate cancer treatment at our institution between November 2015 and March 2021. The surgical procedures performed were laparoscopic radical prostatectomy (LRP) and retropubic radical prostatectomy (RRP). In patients who underwent LRP or RRP, urethral catheters were removed 6 days after surgery. In cases where the patient had diabetes mellitus or the leak test during surgery showed leakage from the vesicourethral anastomosis, urethral catheters were removed only after an evaluation by cystourethrography 6 days after surgery. If the cystourethrography showed leakage, removal of the catheter was postponed. In cases where the patient showed urinary retention after catheter removal, the catheter was placed again. After catheter removal, patients themselves recorded urine volume per voiding. The leak urine volume was calculated using the volume of safety pads. We defined the ULR as the percentage of the leaked urine volume relative to the total urine volume in a 24-hour period, from 24:00 midnight on the day of catheter removal to 24:00 midnight the following day.
The following patients were excluded from the analysis: cases in which the leaked urine volume data was not recorded, those in which the urethral catheter removal was not performed as scheduled, and those who had preoperative urinary incontinence.
