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The Ultrasound Journal

Table 1 Lung ultrasound scoring methods

From: The diagnostic accuracy of lung ultrasound to determine PiCCO-derived extravascular lung water in invasively ventilated patients with COVID-19 ARDS

LUS score

Regions scanned per hemithorax (total)

Points attributed for

Score calculation

Score range

Global LUS

6 (12)

LUS aeration patterns*

Sum of points assigned per region

0–36

LUS–ARDS

6 (12)

LUS aeration patterns* and pleural abnormalities**

2.5 × left hemithorax aeration score + 1 × right hemithorax aeration score + 3.5 × number of antero-lateral pleural abnormalities

0–91

Anterior–lateral

4 (8)

LUS aeration patterns*

Sum of points assigned per region

0–24

B-line

2 (4)

Number of counted B-lines

Sum of points assigned for the number of B-lines***

0–32

  1. *0 points = A lines or < 3 B-lines (A pattern), 1 point =  ≥ 3 well-spaced B-lines occupying < 50% of the intercostal space (B1 pattern), 2 points = coalescent B-lines occupying > 50% of the intercostal space (B2 pattern) and 3 points = lung consolidation > 2 cm in diameter (C pattern)
  2. ** Pleural abnormalities = thickened, fragmented and/or irregular pleura
  3. *** See also Additional file 1: Table S1
  4. LUS Lung ultrasound, ARDS  acute respiratory distress syndrome
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