To compare effects of intravenous hydration, both with and without diuretics on the stone free rate of caluced stones during extra corporesl shockwave lithotripsy (ESWL). We analyzed 22 patients with calyceal stome, primarily treated with Somolith Vision lithotripter, between June 2008 and October 2008. Patients were divided in2 groups, the 11 patients in group 1 were injected with 500 ml norm…