Demographic fields will be obtained preoperatively and include age, race, gender, American Society of Anesthesiologists (ASA) score (for comorbidity assessment), body mass index (BMI), and prior stone disease. Disease fields that will be obtained include stone size (maximal axial and coronal dimensions), degree of hydronephrosis (mild/moderate/severe), history of diabetes mellitus, history of cardiac disease, hypertension, prior urinary tract infection, history of bowel diversion, or neurogenic bladder.