Quadratus Lumborum Block for Analgesia Following Hip Arthroscopy

If the subject has been randomized to the block group, a subcutaneous lidocaine skin wheel placed will be placed followed by a quadratus lumborum regional block with 40 ml, 0.25% ropivacaine deposited deep to the transversus abdominus apnoneurosis and superficial to the fascia transversalis with direct ultrasound guidance. Local anesthetic will be injected in 5 ml aliquots with aspiration for blood performed before and after the injection of each aliquot. Local anesthetic injection will also be observed with real time ultrasound guidance.

"The skin will be cleaned with chlorhexidine. If the subject has been randomized to the no block group, a subcutaneous saline skin wheel will be placed and the procedure would end at this point."