Dubnitskiy-Robin S, Pradère B, d'Arcier BF, et al. - This study was undertaken to investigate the financial effect of switching to single-use ureteroscopes (sURS) in urolithiasis management for a hospital, over a 5-year period, and to distinguish possible solutions to contain or decrease it. Researchers designed a Budget Impact (BI) model for a public hospital conducting around 200 ureteroscopies or extracorporeal shockwave lithotripsies per year. They calculated BI as the difference between financial balances (between costs and revenues) of two environments (with and without sURS). They conducted univariate and multivariate sensitivity analyses. The outcomes of this study showed that BI model gives decision-makers a more accurate picture of the financial effect of switching to sURS and indicates ways to decrease the expected additional cost.