The Association between Sacral Ratio and the Vesicoureteral Reflux

The Vesicoureteral reflux is defined as a backward flow of urine from the bladder into the ureter and renal pelvis, and gastro-esophageal reflux is known as a risk factor for Vesicoureteral reflux. And also, without proper it can cause complications and renal scarring. Sacral Ratio is proposed as an indicator of SR assessment in children with anorectal malformations system. The aim of this study was to investigate the association between the sacral ratio and the Vesicoureteral reflux. This case-control study was conducted on 268 children; there were 109 children with non-urinary complaints and 159 children with urinary complaints. After ensuring the absence of neurogenic bladder and pelvic abnormalities, chronic constipation, kidney stones, trauma, the pelvic sacral ratio was measured on radiographs of all children. The mean sacral ratio in children with and without urinary complaints and in children with urinary complaints with Reflux was 0.131 ± 0.79 and 0.131 ± 0.77and 0.158 ± 0.70, respectively. There was a significant correlation between the measured mean of the first and third group (P=0.008) and second and third group (P=0.008). The abnormal percent of this index in children with reflux was significantly higher than other two groups. There was significant correlation between lower sacral ratio and existence of Ureteral reflux.