Arterial and Venous Blood Gases

A Blood gas test or blood gas analysis tests blood to measure blood gas tension values. It also measure blood PH ,and the level and  base excess of bicarbonate.

  

Blood Gas Component	Arterial	Venous
PH	7.35-7.45	7.31-7.41
PO2	80-100mm Hg	35-40mm Hg
PCO2	35-45 mm Hg	41-51mm Hg
HCO3	22-26 mEq/l or mmol/L	22-26 mEq/L or mmol/L
Base Excess (BE)	-2 to +2 meq/L or mmol/L	-2 to +2 mEq/L or mmol/L
O2 saturatio	95%–100%	68%-77%

 

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