Changes in shunt, ventilation/perfusion mismatch, and lung aeration with PEEP in patients with ARDS: a prospective single-arm interventional study

Table 3 CT scan variables at 5 and 15/20 cmH₂O

CT scan variable	Number	PEEP, 5 cmH₂O	PEEP, 15/20 cmH₂ O	p value*
Total lung weight (g)	12	1887 ± 396	1884 ± 315	0.951
Non-aerated lung weight (g)	12	1152 ± 458	790 ± 425	0.008
Recruitment (%)	12	–	18 ± 17	–
Hyperinflated tissue (%)	12	0 (0–0)	0 (0–0)	0.006
Normally aerated tissue (%)	12	25 ± 12	45 ± 12	< 0.001
Poorly aerated tissue (%)	12	26 (22–35)	29 (19–33)	0.538
Non-aerated tissue (%)	12	45 ± 15	25 ± 14	0.002

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