Figure 4

Signal quantification shows moderate changes in transmission signal (A), where as analysis of dark field (B), and normalized scatter (C) visualizes a stepwise decrease in signal intensity when comparing animals undergoing hyperoxia and MV-O2 with mice breathing room air. The error bars represent the group SDs. n(RA) = 3; n(2 h fiO_2 0.4) = 3; n(8h fi O_2 0.4) = 4; n(2h MV-O_2) = 6; n(8h MV-O2) = 5; *p < 0.05, **p < 0.01.