A 68-year-old postoperative patient with a history of deep v…
A 68-year-old postoperative patient with a history of deep vein thrombosis (DVT) suddenly becomes short of breath, reports chest pain, and is visibly anxious. Vital signs show a blood pressure of 88/54 mmHg, heart rate of 122 bpm, respiratory rate of 28 breaths/min, and oxygen saturation of 85% on room air. Which of the following should the nurse do first?