Time Time 0 (Arrival in ED) 1 hours post admission (Transfer to HDU) 8 hours post admission 18 hours post admission (Discharge to the ward) pH 7.205 7.31 7.41 7.51 PaCO2 (KPa) 3.42 2.79 2.21 4.11 HCO3-mmol/l 7.2 10.2 10.2 24.6 Na+mmol/l 143 141 136 137 K+mmol/l 3.9 3.5 4.2 3.4 Cl-mmol/l 107 103 103 102 lactate mmol/l 2.6 2.4 1.0 0.8 glucose mmol/l 6.8 4.7 4.1 7.4 anion-gap mmol/l 32.7 31.6 26.9 13.8

Table 1: The most significant arterial blood gases are reported. Hospital admission is considered time 0. The transfer to the High Dependency Unit happened 2 hours after hospital arrival.