<prompt> A 50 years old female is admitted with abdominal pain and anuria. Radiological studies revealed: bilateral impacted ureteric stones with hydronephrosis. Urine analysis showed RBCs with pus cells in urine. Serum creatinine level was 16 mgdL and urea level was 200 mmolL. Which of the following should be the immediate treatment?Hemodialysisj stent drainageLithotripsyUreteroscopic removal of stones  <response>: Ans. b j stent drainage Prompt drainage of the obstructed urinary system by double stent is the TOC in patients with renal failure. Hemodialysis is advised only if the renal recovery is prolonged. 