Uroflowmetry Parameters in Patients Undergoing Artificial Urinary Sphincter Implantation

Objectives: The study aims to determine the uroflowmetry parameters of patients undergoing artificial urinary sphincter (AUS) implantation. Hence, uroflowmetry results pre- and post-AUS implantation and differences according to patient background were evaluated. Methods:Thirty-five patients who underwent primary AUS implantation for severe stress urinary incontinence due to radical prostatectomy were enrolled. All patients underwent uroflowmetry tests before and 1, 3, 6, and 12 months after AUS device activation. The patients reported outcomes using validated questionnaires: the King's Health Questionnaire (KHQ), the International Prostate Symptom Score (IPSS), and the quality of life (QOL) score. Results: The mean patient age was 72.8 ± 5.4 years. The mean maximum flow rate (Q _max) value pre-AUS implantation (20.4 ± 11.3 mL/s) was significantly higher at 1-month post-AUS implantation and maintained at 12 months (26.0 ± 14.7 mL/s; p=0.011). KHQ, IPSS, and QOL scores were significantly improved after AUS implantation. Q _max, and voiding volume was significantly higher in patients aged < 73 years compared to those aged ≥ 73 years. Conclusion: Uroflowmetry parameters were improved after AUS implantation and maintained for at least 12 months. Not only subjective outcomes but also objective outcomes of uroflowmetry parameters significantly improved after AUS implantation. This is the first report assessing uroflowmetry outcomes after AUS implantation.