This study will evaluate the implementation of the new care pathway in adult surgical patients with moderate to severe Obstructive Sleep Apnea (OSA) at Moffitt/Long and Mission Bay hospitals. The pathway includes a protocol to appropriately triage, monitor, and treat patients at risk for hypoxic events. The pathway protocol includes: 1) routine screening of OSA to identify patients at risk for hypoxic events in perioperative period, 2) use of protocolized anesthesia methods, and 3) treatment of patients using perioperative Positive Airway Pressure (PAP) therapy when indicated. At the end of implementation period, we will measure the effectiveness of this new protocol using 1) incidence of postoperative hypoxic and cardiovascular events, 2) incidence of unexpected ICU admissions, and 3) length of hospital stay.