When the Unexpected Happens: Diffuse Alveolar Hemorrhage in Negative-Pressure Pulmonary Edema

Area of Science:

• Pulmonology
• Critical Care Medicine

Background:

• Negative-pressure pulmonary edema (NPPE) is a rare consequence of acute airway obstruction.
• Diffuse alveolar hemorrhage (DAH) is an even rarer, life-threatening complication of NPPE.

Observation:

• A young adult presented with hemoptysis and respiratory failure after acute upper airway obstruction.
• Imaging revealed pulmonary edema and bilateral infiltrates suggestive of hemorrhage.

Findings:

• Bronchoscopy and lab tests ruled out other causes of DAH.
• The patient received supportive care, including mechanical ventilation and hemodynamic support.

Implications:

• This case highlights that brief airway obstruction can trigger DAH via NPPE.
• Early recognition and management are crucial for favorable outcomes in this rare condition.