Rohit Bhatt: Dear viewers, in our study, 79 patients with renal and/or ureteral stones were randomized to either single lumen or dual lumen flexible ureteroscopy laser lithotripsy. We assessed linear and volume CT-based stone dimensions with regard to rates of stone clearance and stone-free status.

Despite a twofold greater stone volume in the dual lumen group, the dual lumen provided a four-minute shorter lithotripsy time and a faster stone clearance. Absolute CT-based fragment-free status was significantly higher with the dual lumen at 48% versus 26%. In conclusion, compared to a single lumen ureteroscope, the dual lumen ureteroscope provided a superior CT-based stone-free rate and a more efficient stone clearance. Thank you.