Pediatrics(구연) Oral Session8 / Pediatrics (O-086) Rm.203 10월 30일(수) 16:00-17:00 Validity and Reliability of a Home-Based Guardian-Conducted Video Voiding Test for Voiding Evaluation After Hypospadias Surgery 울산대학교 의과대학 비뇨의학과교실 박민욱, 한재현, 이장희, 전재범, 송상훈, 김건석 Introduction: We investigated the validity and reliability of a home-based guardian-conducted video voiding test for assessing postoperative voiding function. Materials and Methods: In a single center, patients who had undergone urethroplasty by a single surgeon and postoperative uroflowmetry and video voiding tests conducted between 2008 to 2018 were retrospectively reviewed. Urinary stream was categorized into five grades by 3 pediatric urologists in a blinded manner. The relationship between the stream grade and maximum urinary flow was studied to evaluate patients’ postoperative voiding function. Results: Thirty-one patients with hypospadias were enrolled. Patients’ average ages were 15.3 months and 46.6 months at the time of surgery and video voiding tests, respectively. Hypospadias was anterior, mid-penile, and posterior in 2 (6.5%), 17 (54.8%), and 12 (38.7%) patients, respectively. The numbers of patients for each voiding stream grade were 4, very poor; 4, poor; 13, fair; 4, good; and 6, very good. All intraclass correlation coefficients of the stream grade among the 3 observers were >0.95. Correlation between the maximum flow rate obtained by the conventional uroflowmetry and video voiding stream grade was validated (rho = 0.511, P = 0.003). Conclusions: Home-Based Guardian-Conducted Video Voiding Test was easy to perform, and its validity and reliability were demonstrated in assessing patients’ post-urethroplasty voiding pattern. This test can be a supportive tool to the uroflowmetry test, which has limitations. keywords : urethroplasty, video recording, uroflowmetry