Calyx to parenchyma ratio in pelvi‐ureteric junction obstruction

Abstract

Hydronephrosis as measured by an estimate of pelvic volume is an insensitive marker of improvement after pyeloplasty. Reduced calyceal distension correlates well with other favourable prognostic indicators. Therefore, the C/P ratio may be an additional indicator of the appropriateness of surgical intervention, and should be the subject of further study.

Long-term follow-up and management of prenatally detected, isolated hydronephrosis

“…In our study, greater improvement in the DRF was noted in the kidneys with deteriorated DRF postoperatively, but the deteriorated function could not be normalized, despite pyeloplasty. Apart from the DRF, Imaji and Dewan [25] showed that there was a significant difference in the C/P ratios before and after surgery in UPJO and suggested the C/P ratio may be an additional indicator of the appropriateness of surgical intervention. We also measured C/P ratios to determine the recovery of hydronephrosis postoperatively.…”

Pelvis/cortex ratio: An early marker of success following pyeloplasty in children

“…Imaji and Dewan [10] showed that pelvis volume is an insensitive marker and introduced the calyx/parenchyma ratio as a marker of success following pyeloplasty. However, this ratio can not be applied in cases where the pelvis is dilated disproportionately to the calyces before surgery.…”

Predictive Factors of Contralateral Operation after Initial Pyeloplasty in Children with Antenatally Detected Bilateral Hydronephrosis Due to Ureteropelvic Junction Obstruction

“…The parenchymal thickness correlates well with renal function. The C/P ratio is reportedly a sensitive marker for follow-up and may help to predict the outcome of pyeloplasty [20]. This means that the increased intrapelvic pressure distends the calyces and compresses the parenchyma.…”