Inclusion Criteria:  Adults, male and female greater than or equal to 18 years of age and undergoing non-emergent percutaneous nephrolithotomy Monday through Friday between the hours of 6:00AM and 4:00PM. Female participants of childbearing potential will be required to provide a negative pregnancy test. Ability to understand and teach back consent for the procedure. Willingness to sign consent for procedure. English speaking.  Exclusion Criteria:  Emergent surgery status. Local infection Allergy to local anesthetics. Recreational drug use. Inability to provide informed consent. Pregnancy or breastfeeding. History of Guillain-Barre' Syndrome. Underlying medical conditions that would post a significant risk to the patient. Opioid use >90 days in the year leading up to surgery.