Ureteral tortuous dilation surgery is performed primarily through the placement of a ureteral stent, which has the effect of dilating the ureter. Ureteral dilation involves the insertion of a guidewire through the ureteroscope into the ureter after successful anesthesia, especially through the area of ureteral stricture. Along the guidewire, a balloon is placed into the narrowed area of the ureter and dilated. After dilation, a stent is placed and opened to accomplish the purpose of ureteral dilation. The ureteral stent is removed after the procedure, usually in about 3-5 months, depending on recovery. Patients should not be too nervous, the procedure is minimally invasive surgery category, the impact on the patient is relatively small, and actively cooperate with the doctor treatment can be.