A nurse is caring for a client who experienced a femur fracture 8 hr ago and now reports sudden onset dyspnea and severe chest pain. Which of the following actions should the nurse take first?

A. Provide high-flow oxygen The client may have a fat embolism. Oxygenation is the priority to prevent hypoxia and support vital organs. B. Administer IV vasopressor Vasopressors may help hypotension, but oxygenation comes first. C. Monitor for headache Headache is not the primary concern here. D. Check for Chvostek’s sign Chvostek’s sign is for hypocalcemia, unrelated to this emergency.