Pulmonary Oedema: An Unusual Aetiology

infiltrates. His clinical condition rapidly normalised over the next few hours, and a repeat chest radiograph at 48 h was normal. Transthoracic echocardiography, renal and brain imaging were normal. The diagnosis is most consistent with negative pressure pulmonary oedema, also known as post-obstructive pulmonary oedema. This is caused by repeated, very forceful inspiratory manoeuvres against an obstructed upper airway (Müllers manoeuvre) with resultant highly negative intra-pleural pressures. This leads to increased pulmonary capillary pressures with transudation of fluid across the capillary membrane and alveolar oedema formation [1] .