lung entrapment
Trapped lung.
Posteroanterior radiograph of the chest demonstrates a large right pleural effusion with compressive atelectasis.
Trapped lung.
Inspiratory posteroanterior radiograph of the chest demonstrates smaller right pleural effusion with pneumothorax.
Trapped lung.
Expiratory posteroanterior radiograph shows no change of the pneumothorax when compared to inspiratory radiograph. Right pleural effusion is also unchanged from inspiratory radiograph.
Trapped lung.
Posteroanterior radiograph of the chest shows interval placement of a right chest tube with successful evacuation of right pleural effusion, but no significant expansion of the right lung consistent with trapped lung.
Lung entrapment is a term given to non-expandable lung due to active pleural inflammation, malignancy, or hemothorax.
The term is similar but not entirely synonymous with trapped lung, which is due to pleural inflammation from remote disease resulting in fibrous thickening of the pleura.
Radiographic features
Plain radiograph
Features of lung entrapment include contralateral mediastinal shift, whereas trapped lung there is no mediastinal shift .
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