Inclusion Criteria:  undergoing unilateral primary hip arthroscopy with at least moderate postoperative pain anticipated analgesic plan includes a general anesthetic age 18 years or older  Exclusion Criteria:  morbid obesity as defined by a body mass index > 40 (BMI=weight in kg / [height in meters]2) any planned regional analgesic or anesthetic chronic opioid use (daily use within the 2 weeks prior to surgery and duration of use > 4 weeks) history of opioid abuse any comorbidity which results in moderate or severe functional limitation inability to communicate with the investigators or hospital staff pregnancy incarceration any reason for increased risk of a peripheral nerve block (e.g. anticoagulation)