An unresponsive 68-year-old man with a known history of severe chronic obstructive pulmonary disease is rushed to the resuscitation bay by his family. His wife reports that his breathing became progressively more labored over the previous 6 hours before he became unarousable at home. Currently, the patient only groans and minimally withdraws in response to a sternal rub. His temperature is 37.2°C (99.0°F), blood pressure is 145/88 mmHg, pulse is 118/min, and respiratory rate is 30/min. Pulse oximetry reveals an oxygen saturation of 81% on room air. The physical examination is notable for shallow, rapid respirations with marked intercostal retractions and poor bilateral air movement. Which of the following is the most appropriate initial step in this patient's management?
- Endotracheal intubationCevap
- BInitiation of non-invasive positive pressure ventilation
- CAdministration of intravenous methylprednisolone and continuous nebulized albuterol
- DPortable chest radiography
- EArterial blood gas analysis