Pulmonary edema associated with croup and epiglottitis

Area of Science:

• Pediatric Critical Care Medicine
• Respiratory Physiology
• Emergency Medicine

Background:

• Acute upper airway obstruction, such as laryngotracheitis (croup) and epiglottitis, typically presents with respiratory distress.
• Pulmonary edema is an uncommon complication of upper airway obstruction in children.

Observation:

• Two children with croup and epiglottitis developed severe pulmonary edema.
• No cardiac enlargement was observed in either child.
• Hemodynamic evaluation in one child showed normal pulmonary artery occluded pressure.

Findings:

• Pulmonary edema in these cases may result from alveolar hypoxia, increased alveolar-capillary pressure gradient, and catecholamine-mediated fluid shifts.
• These factors increase pulmonary capillary blood volume, permeability, and hydrostatic pressure, leading to fluid transudation.
• Impaired lymphatic drainage contributes to the development of pulmonary edema.

Implications:

• Physicians should consider pulmonary edema in children with acute upper airway obstruction.
• Prompt and vigorous therapeutic interventions, including airway support, ventilation, and fluid management, are essential.
• Understanding the pathophysiology can guide treatment strategies for this rare but serious complication.