Treatment of Pulmonary Edema from Drowning
The treatment of pulmonary edema from drowning prioritizes aggressive airway management and ventilation with supplemental oxygen, as the underlying pathophysiology is severe hypoxemia-driven noncardiogenic pulmonary edema, not volume overload. 1
Initial Resuscitation Framework
The 2024 AHA/AAP guidelines emphasize that drowning-related pulmonary edema results from a continuum of respiratory arrest progressing to cardiac arrest, making airway management and ventilation the absolute priority over circulation 1, 2.
Immediate Management Steps:
Oxygenation is paramount - Administer the highest concentration of oxygen available immediately, as cardiac arrest following drowning is the result of severe hypoxemia 1.
Ventilation strategy depends on severity:
For spontaneously breathing patients with mild-moderate pulmonary edema: Consider non-invasive positive pressure ventilation (CPAP/BiPAP) as first-line therapy. Case reports demonstrate successful treatment with nasal-CPAP plus oxygen in patients who are conscious and breathing spontaneously 3.
For severe pulmonary edema or respiratory failure: Proceed directly to mechanical ventilation with positive end-expiratory pressure (PEEP). The noncardiogenic pulmonary edema from drowning responds well to PEEP, which addresses the loss of surfactant, increased capillary-alveolar permeability, and atelectasis 4, 5.
Advanced Ventilation Management
For severe ARDS from drowning: Ultra-protective ventilation strategies (tidal volumes as low as 2.8 ml/kg predicted body weight) combined with VV-ECMO have shown excellent outcomes in case reports, with successful weaning and no pulmonary sequelae 6. This approach minimizes ventilator-induced lung injury while optimizing oxygenation.
Target ventilation parameters: Aim for intrapulmonary shunt ≤20% or PaO2:FiO2 ≥250 4.
Critical Pitfalls to Avoid
Do NOT treat as cardiogenic pulmonary edema: This is noncardiogenic pulmonary edema caused by direct alveolar membrane damage from aspirated water, loss of surfactant, and increased capillary permeability 4. Diuretics are NOT indicated unless there is documented volume overload from overzealous fluid resuscitation.
Beware of delayed deterioration: Fulminant pulmonary edema can develop 50-100 minutes after the initial drowning event, even after apparent stabilization 5. All drowning victims require close observation for several hours, even if initially stable.
Avoid premature extubation: Premature ventilatory weaning may cause return of pulmonary edema, requiring re-intubation and prolonging hospital stays 4.
Adjunctive Therapies
While the evidence is dated and of lower quality, historical case reports suggest consideration of:
- High-dose corticosteroids for severe cases 7
- Forced diuresis only if volume overloaded 7
- Antibiotics if aspiration of contaminated water is suspected 7
However, these adjuncts are secondary to the primary treatment of aggressive oxygenation and ventilation support.
Disposition
Admit to ICU any patient with significant drowning severity, ongoing respiratory distress, or abnormal vital signs, as the clinical course can deteriorate rapidly 4.