[Acute pulmonary edema following airway obstruction and cardiac tamponade related to mediastinal tumor].

A case is reported of acute airway obstruction and pulmonary oedema of mixed origin (cardiogenic and non cardiogenic), occurring in a patient after surgical treatment for pericardial tamponade due to a mediastinal tumour. This 45 year old female patient had a non-Hodgkin lymphoma, mostly located within the anterior and middle mediastinum. When she developed cardiac tamponade, emergency cardiac decompression was carried out. The surgical procedure went well, despite an episode of severe hypotension. Immediately after extubation, she developed paradoxical breathing with retraction and cyanosis. She was reintubated and ventilated. The chest X-ray showed bilateral alveolar infiltrates, mostly around the hilar. Two hours later, she was again extubated and developed again the same respiratory failure. This time, she was intubated and ventilated for 48 h. She was then extubated with no problem. It seemed most probable that transmission to the interstitial space of a negative intrapleural pressure due to the inspiratory efforts made against an occluded airway was the principal mechanism responsible for the accumulation of fluid to this space.