4. Normal Lung Ultrasound Appearance
Ultrasound findings suggestive of pneumothorax:
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Absence of lung sliding (pleural line static).
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Absence of lung pulse (if ventilation suppressed but heart still generating pleural micro-movements).
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Presence of A-lines only (air only) in the zone.
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Lung point: Transition zone between sliding pleura and non-sliding pleura — highly specific for pneumothorax.
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M-mode: “Barcode/stratosphere sign” instead of “seashore sign”.
5.2 Interstitial Syndrome / Pulmonary Edema
