Pulmonary angiography with external cardiac compression in fatal pulmonary embolism.


rupture owing to high pressure or damage to the septa the air passes through the lower-pressure alveolar sheaths to the mediastinum via the lung roots. Passage of air from the mediastinum to the neck or retroperitoneal space tends to decompress the mediastinum. The appearance of subcutaneous emphysema in the neck in respiratory disorders usually indicates… (More)


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