Comparison of a 4.5 F semi-rigid ureteroscope with a 7.5 F rigid ureteroscope in the treatment of ureteral stones in preschool-age children

Abstract

The aim of this study was to compare the success and complication rates of a 4.5F ureteroscope with a 7.5F ureteroscope in the treatment of urolithiasis in preschool-age children. We retrospectively reviewed 69 ureteroscopy (URS) procedures in a pediatric population (40 boys, 29 girls). We divided the patients into two groups according to the type of ureteroscope used: group 1 (n=42, Storz 7.5F) and group 2 (n=27, Wolf 4.5F). We statistically compared all the procedures performed in both groups regarding patient age, complication rates, whether the procedure was therapeutic, and whether we used a guidewire. Additionally, in cases with ureteral stones, we also compared the stone clearance rate and the necessity of X-ray imaging between the two groups. The mean patient age was 56.04 months in group 1 and 47.48months in group 2 (p=0.057). The stone-free rate was 78.6% in group 1 and 92.6% in group 2 (p>0.05). However, when we compared the stone-free rates for patients younger than 3 years, the rate was 66.7% in group 1 and 93.8% in group 2 (p<0.05). The difference was not statistically significant for patients between the ages of 4 and 7years. The success and failure rates revealed better outcomes for treatment of ureteral stones with a 4.5F ureteroscope. We recommend the use of the mini-ureteroscope, especially in infants and preschool-age children.