Figure 4

Circulating leukocytes in healthy volunteers.
Numbers of circulating (a) neutrophils, (b) monocytes and (c) lymphocytes. The period that subjects were fitted with the respiratory helmet and breathed hyperoxic or normoxic air is indicated with a grey box. In the endotoxemia groups, LPS was administered at T = 0 hours. Data are expressed as mean ± SEM NORM-E: normoxic endotoxemia, HYPER-E: hyperoxic endotoxemia, HYPER: hyperoxia.