In pulmonary edema, what is the initial emergency department management and pharmacotherapy?

• A. Observation without oxygen
• B. Oxygen; diuretics such as furosemide; nitrates if not hypotensive; consider vasodilators; treat underlying cause
• C. Steroids and bronchodilators only
• D. Immediate intubation for all patients

Answer: (B)

In acute pulmonary edema, the priority is to rapidly improve oxygenation and reduce pulmonary congestion by unloading excess fluid and decreasing venous return, while addressing the underlying cause. Start with supplemental oxygen to correct hypoxemia and lower work of breathing. Then use a loop diuretic like furosemide to rapidly offload fluid, which reduces preload and pulmonary vascular pressures. If the patient is not hypotensive, administer a nitrate such as nitroglycerin to cause venodilation, lowering filling pressures and improving pulmonary edema; vasodilators may be used to further reduce preload and afterload as appropriate. It’s essential to treat the underlying cause (for example, acute coronary syndrome or heart failure). Consider noninvasive ventilation for patients in significant distress or with hypoxemia who do not promptly improve, and intubation is not required for every case. This combination—oxygen, diuresis, vasodilators when not hypotensive, and addressing the underlying cause—addresses the immediate pathophysiology of cardiogenic pulmonary edema and stabilizes the patient.