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Sonographic

diagnosis of pneumothorax: M-mode and the absence of lung sliding are shown as the ‘stratosphere sign’: Parallel horizontal lines above and below the pleural line, resemble a ‘barcode.’ This sign indicates a pneumothorax at this intercoastal space

Sonographic

diagnosis of pneumothorax: ‘Lung point sign.’ (Right) B-mode depicting the lung point: Sliding lung touching the chest wall. (Left) The ‘seashore sign’ (white arrow) and the ‘stratosphere sign’ (dotted arrow) as the lung intermittently contacts the chest wall