Table 1. Arterial blood gases and electrolytes during acute apnea.

	Baseline	Apnea
pH	7.40±0.02	7.29±0.03*
pCO2 (mmHg)	31.00±3.61	51.00±6.00*
pO2 (mmHg)	90.33±4.16	20.67±4.16***
HCO3- (mmol/L)	20.20±0.95	24.10±2.05*
TCO2 (mmol/L)	21.10±1.05	25.63±2.25*
SaO2 (%)	96.33±0.58	26.67±7.77***
Na+ (mmol/L)	139.67±2.08	140.33±1.53
K+ (mmol/L)	3.73±0.15	3.67±0.67
Ca2+ (mmol/L)	1.28±0.08	1.31±0.07
BE (mmol/L)	-2.73±0.81	-2.63±1.22
BEecf (mmol/L)	-3.63±1.00	-2.73±1.05

SaO2 oxygen saturation, BE base excess, BEecf base excess of extracellular fluid.

*P < 0.05, ^*P < 0.01, ^***P <0.001 vs. sham group, n=6 in each group.