Does the Compliance of the Bladder Affect the Grade of Vesicoureteral Reflux?

Aim: We retrospectively reviewed videourodynamic outcomes in children with primary vesicoureteral reflux. The aim of this study to evaluate the relationship between vesicoureteral reflux grade and bladder compliance. Material and Method: Videourodynamic traces of 53 children with primary vesicoureteral reflux investigated between January 2004 and January 2012 were reviewed. The detrusor pressures of the point when the reflux started were recorded. The detrusor pressures 10 cmH2O or less at that point was accepted as normal compliance (Group 1), the detrusor pressures more than10 cm H2O was accepted as hipocompliance (Group 2). The reflux grades were divided into two grades, low-grade reflux (grades 1 and 2), high-grade reflux (grades 3, 4 and 5). Data were analyzed using the chi-square test. Results: Patients’ ages ranged between 5 and 11 years (mean 7.09±1.81 years). Of the 53 patients, 29 (54.7%) had normal compliance (Group 1), 24 (45.3%) had hipocompliance (Group 2). Twenty-four (82.8%) patients in-group 1 had a low-grade reflux, 5 (17.2%) patients had a high-grade reflux. In group 2, 8 (33.3%) patients had a low-grade reflux, 16 (66.7%) patients had a high-grade reflux. The detected high-grade reflux in-group 2 was significantly higher than in-group 1 (p<0.001). Discussion: The physicians should be considering the bladder compliance at the point when the reflux started in primary vesicoureteral reflux cases. The bladder hipocompliance may play a secondary role in reflux grade