Fig. 2

Comparison of the blood gas parameters in the arterial blood of the patients between the control group (black empty squares) and the DEX group (red solid squares). Day 0 corresponds to the day of ICU admission when the treatment is initiated. Asterisk (*) indicates p < 0.05 when the parameter is compared to that on day 0 within the same group; pound sign (#) indicates p < 0.05 when the parameter is compared between the two groups at the same time. The dotted line in each graph indicates a reference value or a normal range. (a) Acidity in the blood samples with reference range of 7.35–7.45; (b) [aHCO3−] with a normal value of 22–26 mmol/L; (c) PaCO2 with a normal range of 35–45 mmHg; (d) PaO2 with a normal range of 80–100 mmHg; (e) SO2 in the arterial blood with a normal range of 95–98%; (f) PaO2/FiO2 with a critical value of 300 mmHg; (g) aADO2 in mmHg; (h) tHb in the blood with a normal range of 11.5–17.4 g/dL; (i) HbO2 shown as the percentage of tHb, with a normal range of 90–95%