ESPU Congress 2018 - Abstract Book

153 11–14 APRIL, 2018, HELSINKI, FINLAND 16:52–16:55 S20-3 (PP) URODYNAMIC PARAMETERS IN BOYS WITH URINARY INCONTINENCE UNDERGOING CYSTOSCOPY Pauline OSTENDORF  1 , Alexander STILLEBROER  1 , Keetje DE MOOIJ  1 , Pieter DIK  1 , Tom DE JONG  2 and Aart KLIJN  1 1) University Children's Hospital UMC Utrecht, Pediatric Urology, Utrecht, NETHERLANDS - 2) University Children's Hospital UMC Utrecht and AMC Amsterdam, Pediatric Urology, Utrecht, NETHERLANDS PURPOSE Infravesical obstruction is considered a cause of urinary incontinence in boys. Failure of urotherapy or acute relapse after cessation of anticholinergic treatment warrant suspicion for this condition. Little is known about urodynamic investigations in these patients. The aim of this study was to compare urodynamic data in boys with overactive bladder complaints and incontinence, considered as obstructive, with cystoscopy findings. MATERIAL AND METHODS A cohort of 68 boys that have been treated for overactive bladder complaints and incontinence, in 2015, aged 4–18 years, has been reviewed. Urodynamic parameters collected were: Qmax(ml/ sec), PQmax(cmH2O, bladder pressure during Qmax) and URA(urethral resistance algorithm). A Cut-off value for obstruction was PQmax > 55 cmH20. Cystoscopy findings were reconsidered. The degree of infravesical obstruction was scored by three clinicians on a scale of 1–5 judged on the operation report. A score was given of 1=no obstruction(group 1), 2–3=moderate obstruction(group 2) and 4–5=severe obstruction(group 3). RESULTS In 4 cases no obstruction was detected (group 1), 31 had moderate (group2) and 33 severe obstruction(group 3). The mean Qmax was 10.6 for group 1, 10.2 for group 2 and 9.1 for group 3. Mean PQmax was 63.5, 66.6, 72.8 and mean URA 30.2, 31.7, 37.3 for all groups respectively. The difference between URA in groups 2 and 3 was not statistically significant (p=0.097). CONCLUSIONS With a 6Fr urodynamic catheter a cut-off pressure of PQmax 55 cm and a URA of > 30 has a high specificity for diagnosing urethral obstruction in boys with overactive bladder complains. 16:55–17:05 Discussion