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. Author manuscript; available in PMC: 2014 Feb 1.
Published in final edited form as: Crit Care Med. 2013 Feb;41(2):527–535. doi: 10.1097/CCM.0b013e31826ab1f2

Figure 6.

Figure 6

Effects of PEEP at baseline conditions (black triangles), after saline lavage (grey circles), and following surfactant administration (gray squares) on the distribution of aeration density ranges (% of total slice area). Density ranges were defined as: non-aerated (≥ −100 HU), poorly aerated (−500 to −101 HU), normally aerated (−900 to −501 HU), and hyperinflated (< −900 HU). †: P<0.01 and ‡: P<0.001 for the effect of PEEP; ¶: P<0.01 and §: P<0.001 vs. saline lavage at PEEP 0 or 9 cmH2O.