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Describe and interpret this arterial blood gas:
History: 45y male found in his garage. Brought in by ambulance with altered mental state. His arterial blood gas on arrival (FiO2 = 0.21%):
pH 6.90 Na 153
pCO2 20 K 4.1
pO2 115 Cl 109
HCO3 4.0 Glucose 5.2
COHb <1.0% Urea 5.5
Ethanol <0.01% Osmolality 335
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