Study Design Rationale The American Society of Anesthesiologists' practice guideline on obstructive sleep apnea (Anesthesiology 2006) clearly supports the use of regional anesthesia and analgesia as a way to reduce perioperative opioid usage. The technique described in our proposal is essentially a "single intervention" as the anesthetic always includes a general anesthesia. As this is the standard of care, we would not be able to employ a randomized control design that denies this "better care" randomly to some patients.