The efficacy of antimicrobial coated of ureteral stent with silver sulphadiazine in prevention of UTI in patients with ureteral stents will be studied by comparining the results of urine and stent cultures with patients who had non-coated ureteral stents. The impact of antimicrobeal stent coating on patients' quality of life will be evaluated with comparing the scores of ureteral stent symptom questionnaire between both groups.
This study will be conducted to compare the efficacy of antimicrobial coated ureteral stent with non-coated stents in prevention of UTI in patients with ureteral stents