Homework in Retrograde Intrarenal Surgery

Inclusion Criteria: * Patients with an indication for RIRC Exclusion Criteria: * Patients with anatomic abnormalities such as horseshoe kidney, fragments in the calyx diverticulum, infundibular stenosis, pelvi-ureteral junction obstruction or ureteral stenosis. * Patients with morbid obesity, uncontrolled hypertension, previous cerebrovascular accident, skeletal deformity such as significant coronary artery disease or symptomatic gastro-esophageal reflux disease. * Patients with lumbar disc herniation who have undergone spinal surgery and are unable to undergo behavioral therapy.