Effect of electrical impedance-guided PEEP in reducing pulmonary complications after craniotomy: study protocol for a randomized controlled trial

Table 3 Scoring criteria for lung ultrasound images

Score	Ultrasonic image
0 point	Clear A lines and pleural sliding sign with or without 0–2 B lines
1 point	≥ 3 B lines or small subpleural consolidations separated by smooth pleural lines
2 points	Multiple merged B lines or small subpleural consolidations separated by thickened and irregular pleural lines
3 points	> 1 × 2 cm subpleural consolidations

ISSN: 1745-6215