Figure 2.

The patient underwent ESWL on November 30 of 2011. Two days after the ESWL, the stent located at the left kidney (A) was successfully removed by performing cystoscopy, yet the stent at the right kidney (B) could not be removed due to the large size of the residual fragments. An F5 ureteral catheter was inserted to the right renal pelvis, followed by another session of ESWL. After the ESWL, 1.5% sodium bicarbonate solution was then steadily dripped into the ureteral catheter for urine alkalization. The follow-up renal ultrasonography on December 7 of 2011 showed no evidence of stone fragments, and the stent left in the right kidney was also successfully removed.