Clinical Significance of Supranormal Differential Renal Function in the Recovery of Hydronephrosis

Using a flank approach, as the patient was placed in the lateral decubitus position, and an anterior subcostal incision was made. The narrow segment of UPJ was identified and resected, and then the proximal edge of the ureter was spatulated to allow a wide anastomosis between the ureter and the most dependent part of the renal pelvis. The extent of renal pelvis reduction was decided by the surgeon.