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Figure 4 | Critical Care

Figure 4

From: Clinical and biological role of secretory phospholipase A2 in acute respiratory distress syndrome infants

Figure 4

Biophysical behavior of surfactant after repeated compression-expansion dynamic cycles in captive bubble surfactometry. Panels A and B: illustrative results for one sample of each group in terms of minimum surface tension (γ). Dynamic cycling of control (A) and ARDS infants (B): cycle number 1, 10, and 20 are depicted by black and grey circles and grey triangles, respectively. Panel C, D, and E: pooled data from cases and controls, after 20 compression-expansion dynamic cycles. Panel C shows mean minimum surface tension (γ) to be higher in ARDS than in controls (*P = 0.034); panels D shows mean maximum surface tension (δ); panel E shows relative area, that is the proportion of compression needed to reach γ at the end of the 20th dynamic cycle. Data are shown as mean. T-bars represent standard error.

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