Table 4.

Definitions of ultrasound lung abnormalities

Abnormal lung patterns	Definition / ultrasound findings
Alveolar/Interstitial syndrome	3 or more B-lines in a single rib space B-lines were defined as hyperechoic, vertical artifacts arising from the pleural line and reaching the bottom of the screen without fading
Collapse or atelectasis	Loss of lung volume, increased tissue density, and hyperechoic static air bronchograms
Consolidation	Tissue-like pattern or “hepatization” with minimal volume loss and the presence of dynamic air bronchograms
Pneumothorax	Absence of lung sliding and lung pulse
Pleural effusion	Anechoic space between the parietal and visceral pleura with movement with the respiratory cycle. Significant pleural effusion is defined as > 1 cm. An estimation of the volume of a pleural effusion in milliliters (ml) will be done multiplying by 200 the distance in cm in the vertical plane from the diaphragm to the inferior lung border at the junction of the collapsed lung and aerated lung