A 56-year-old patient arrives in the emergency department co…
A 56-year-old patient arrives in the emergency department complaining of sudden shortness of breath, sharp pleuritic chest pain, and anxiety. Vital signs are: BP 92/60 mmHg, HR 122 bpm, RR 32 breaths/min, SpO₂ 84% on room air. The patient has a history of deep vein thrombosis after knee surgery two weeks ago. Cardiac monitor shows sinus tachycardia. As the primary nurse, which action should you perform first?
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