Table 3.

POCUS and its interpretation

POCUS appearance	Image	Pathological representation
A line - Horizontal lines occur at multiples of distance between the ultrasound probe and the lung.		Normal lung. Represent reverberation artefacts produced by sound waves and visceral pleural or lung surface. Should be associated with sliding lung. Absence of sliding lung indicates presence of pneumothorax.
B Line Vertical lines <3/field is a normal finding. However, B line with varying thickness or increase in number is abnormal.		Indicates fluid deposition in pulmonary interstitial space or alveoli. Apex- Base gradient is seen in pulmonary edema due to heart failure. No gradient is seen in ARDS. Number of lines correlate with severity
Sonographic air bronchogram is seen. Anechoic or dark pleural effusion is noted		Corresponds to consolidation