|
Feature |
Seashore Sign |
Barcode Sign |
|
Other Names |
Sandy beach sign |
Stratosphere sign |
|
Definition |
Normal lung sliding on M-mode ultrasound. |
Absence of lung sliding on M-mode ultrasound. |
|
Appearance |
Wavy pattern below the pleural line (sea) with a static pattern above it (shore). |
Uniform horizontal parallel lines resembling a barcode. |
|
Seen in |
Normal lungs |
Pneumothorax |
|
Underlying Physiology |
Indicates normal contact and sliding of visceral and parietal pleura. |
Indicates separation of pleural layers by air, preventing sliding. |
|
Clinical Significance |
Confirms the absence of pneumothorax in the scanned region. |
Suggestive of pneumothorax in the scanned region. |
|
Diagnostic Mode |
M-mode ultrasound |
M-mode ultrasound |