Efficacy of various laser devices on lithotripsy in retrograde intrarenal surgery used to treat 1‐2 cm kidney stones: A prospective randomized study

Aims To compare the efficacy of different laser devices and power ranges on lithotripsy in retrograde intrarenal surgery (RIRS) for 1‐2 cm kidney stones. Methods A total of 223 participants undergoing RIRS for 1‐2 cm kidney stones at our clinic between January 2015 and January 2017 were recruited for this prospective study (NCT02451319). Two hundred and four participants included in our study were randomly allocated into either ≤20 W with 20 W laser device (group 1) or ≤20 W with 30 W laser device (group 2) or >20 W with 30 W laser device (group 3). Results There was no significant difference between the groups in terms of demographic and stone characteristics. Operation and fluoroscopy times were significantly longer (P = .003 and P