Incontinence & Female Urology & Neurourology(구연) (E-182) 배뇨근저활동성이 전립선절제술후 발생한 요실금에 대한 인공요도괄약근 치료의 결과에 미치는 영향 가톨릭대학교 부천성모병원¹, 가톨릭대학교 서울성모병원² 조강준¹, 배웅진², 최진봉¹, 고준성¹, 한규헌¹, 이지열², 김세웅², 김준철¹ Objective: In postprostatectomy incontinence (PPI) patients, various urodynamic changes can occur. If they have detrusor underactivity (DU), patients or physicians should consider worsening voiding difficulty or increased postvoid residual volume (PVR) after surgical treatment for PPI. There is lack of evidence of the impact of DU on the outcome of artificial urinary sphincter (AUS) for PPI yet. We evaluated the impact of DU on the outcome of AUS for PPI. Materials and Methods: We retrospectively reviewed the medical records of patients who underwent AUS for PPI. Exclusion criteria were lack of preoperative urodynamic study, follow up less than 3 months after AUS, persistent SUI without improvement after AUS, or revision of AUS due to complications related to AUS within 3 months. We assigned to two groups, as DU group and non-DU group. DU was defined as a bladder contractility index (BCI) less than 100 on urodynamic study. We compared postoperative results of maximum uroflow rate (Qmax), PVR, international prostate symptom score (IPSS), and patient satisfaction in each group. Results: A total of 78 patients were assessed. Of those, DU group consisted of 55 (70.5%) patients, and non-DU group comprised 23 (29.5%) patients. BCI was significantly lower in the DU group than in the non-DU group in the urodynamic study before AUS (60.7±19.9 vs 124.2±24.6, P<0.001). Qmax was lower in the DU group than in the non-DU group (8.6±3.6ml/s vs 20.8±7.9ml/s, P<0.001) and PVR was higher in the DU group than in the non-DU group (66.9±105.7ml vs 9.9±20.1ml, P<0.001) in the urodynamic study before AUS. There were no differences in other urodynamic parameters and clinical characteristics between two groups. Qmax after AUS was lower in the DU group significantly (18.2±8.8ml/s vs 27.6±9.9ml/s, P=0.002), but PVR, IPSS, and patient satisfaction were not different between two groups. Conclusions: There was no clinically significant impact of preoperative DU on the outcome of AUS for PPI, thus AUS can be conducted safely in the PPI patients with DU. keywords : stress urinary incontinence, artificial urinary sphincter, detrusor underactivity