Research and Reports in Urology (Sep 2020)
Evaluation of Functional Bladder Capacity in Children with Nocturnal Enuresis According to Type and Treatment Outcome
Abstract
Byeong Jin Kang,1,2 Jae Min Chung,1,3,4 Sang Don Lee1,3,4 1Department of Urology, Pusan National University School of Medicine, Yangsan, Korea; 2Department of Urology, Pusan National University Hospital, Busan, Korea; 3Department of Urology, Pusan National University Yangsan Hospital, Yangsan, Korea; 4Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, KoreaCorrespondence: Jae Min ChungDepartment of Urology, Pusan National University Yangsan Hospital, 20 GeumoRo, Mulgeum-Eup, Yangsan 626-700, KoreaTel +82-55-360-2678Fax +82-55-360-2164Email [email protected]: This study aimed to identify whether functional bladder capacity (FBC) differs among subgroups of nocturnal enuresis (NE) patients and can be used to predict treatment response.Methods: A total of 69 children with NE were included in this study between July 2017 and February 2019 according to medical chart review, retrospectively. All patients completed a questionnaire about voiding symptoms and 48-hour frequency/volume (48-h F/V) charts. FBC was obtained from the 48-h F/V charts and uroflowmetry (UFM) with post-void residual volume (PVR). All patients were primarily treated with standard urotherapy and pharmacological therapy. The response rate was analyzed at 3 months after treatment.Results: The mean age of the 69 patients (42 male, 27 female) was 83.3 ± 22.4 months (range, 5– 13 years) at the first visit. The percentages of children with monosymptomatic NE (MNE) and non-monosymptomatic NE (NMNE) on the questionnaire were 40.6% (28/69) and 59.4% (41/69), respectively. FBC of all patients was lower than the normal range of expected bladder capacity, and there were no significant differences between measurement methods, NE types (MNE vs NMNE), or response rates (p > 0.05).Conclusion: Children with NE had diminished FBC in both 48-h F/V charts and UFM with PVR. We found no difference in FBC by NE type or treatment outcome. Therefore, FBC cannot be used to distinguish between NE types or predict treatment responses.Keywords: nocturnal enuresis, functional bladder capacity, outcome
