A 25-year-old male with a long history of severe asthma presents to the emergency room with shoness of breath. He has previously required admission to the hospital and was once intubated for asthma. Which of the following findings on physical exam would indicate a benign course?
Silent chest Hypercapnia Thoracoabdominal paradox (paradoxical respiration) Pulsus paradoxus of 5 mmHg