Blood Gas Analysis
Basic Information 
Typical Normal Range (US units; SI units)
• Blood pH 7.36 to 7.44 (arterial), 7.33 to 7.41 (venous)
• Pco2 (mm Hg) 37 to 49 (arterial), 46 to 64 (venous)
• Po2 (mm Hg) 89 to 115 (arterial), 28.7 to 48.6 (venous)
• HCO3− (mmol/L) 23 to 30 (arterial), 31.6 to 37.7 (venous)
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