A nurse administers an opioid analgesic to a postoperative client who also has severe obstructive sleep apnea (OSA). Which intervention is most important for the nurse to implement before leaving the client alone?

D Put and lock the side rails in place. C Apply the clientÔÇÖs positive airway pressure device. B Elevate the head of the bed to a 45-degree angle. A Remove dentures or other oral appliance.