Efficiency and Safety of Holmium Laser With Moses Technology Versus SuperPulsed Laser System With Thulium Fiber Laser on Renal Stones

Inclusion Criteria: * Patients with renal stones who require endoscopic laser treatment in the outpatient operating room. Patients may have an ureteropelvic junction (UPJ) stone if the treatment of the stone is completed in the kidney. * Patients' stone size in a single renal unit of greater than or equal to 5 millimeters (mm) and less than or equal to 20 mm. Stone size is defined as the largest diameter of a single stone on pre-operative CT as assessed by the urologist. Patients with multiple stones will be included as long as their largest stone size falls within the above parameters. Exclusion Criteria: * Pregnant patients * Patients with transplant kidneys or other anatomic variations: horseshoe kidney, pelvic kidney, ptotic kidney, urinary diversion or ureteral stricture * Patients with irreversible coagulopathy * Patients with known ureteral stricture disease * Patient who do not have a pre-operative CT * Non-English speaking patients and patients in other vulnerable groups such as lacking of decision-making capability, prisoner, or adult unable to consent * Uric acid composition greater than 50 percent on pre operative stone analysis. Patients will be excluded post operatively if stone analysis from the time of surgery is greater than 50 percent uric acid. * Prior ureteroscopy within 6 weeks of current surgery * Urothelial tumor(s), direct extraction of the stone(s) without needing laser lithotripsy, and failure to reach the stone in the upper urinary tract with the…