A prospective randomized controlled trial of a single-use alloy-coated ureteral stent catheter set for temporary internal drainage of the ureter

INTERVENTION: test group:Use a single‐use alloy‐coated ureteral stent catheter;control group:Use a ureteral stent(Bard Healthcare Science (SHANGHAI) Co., Ltd.); CONDITION: kidney stones, ureteral calculi PRIMARY OUTCOME: stent drainage patency; SECONDARY OUTCOME: intubation success rate;drainage duration;laboratory test indicators;bacterial colonization rates of urine and scaffolds; INCLUSION CRITERIA: 1. Over 18 years old, regardless of gender; 2. Patients with kidney stones and ureteral calculi who choose temporary ureteral internal drainage; 3. Volunteer to participate in the trial and sign the informed consent.