Fig. 2

Change in driving pressure produced by ECC vs. change in driving pressure produced by PEEP reduction. N = 11. Relationship between variations in driving pressure obtained after 5 min of ECC (5 min ECC driving pressure—baseline driving pressure) and variations in driving pressure obtained after PEEP reduction (PEEP reduction driving pressure—baseline driving pressure). A strong correlation (R² = 0.82, P < 0.001) was observed between these variables. ECC external chest-wall compression, DP driving pressure