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ABG's

ABG's and their values

TermDefinition
PAO2 Alveolar oxygen tension
PcO2 Pulmonary capillary oxygen tension
PaO2 Arterial oxygen tension 75-100 mg
PvO2 mixed venous oxygen tension
PACO2 alveolar carbon dioxide tension
PcCO2 pulmonary capillary carbon dioxide tension
SaO2 Arterial oxygen saturation
SvO2 mixed venous oxygen saturation
pH Range 7.35-7.45; normal 7.40 <7.35 acidosis >7.45 alkalosis
HCO3 plasma bicarbonate concentration range 22-26 mEq/L(some books 24-28) ; normal 24 <22 acidosis >26 alkalosis
PaCO2 range 35-45 mmHg; normal 40 >45 acidosis <35alkalosis
mEq/L # of grams of solute contained in 1mL of a normal solution
CaO2 oxygen content of arterial blood = (Hbgx1.34xSaO2)+(PaO2x0.003)
CcO2 oxygen content of capillary blood
CvO2 oxygen content of mixed venous blood
V/Q ventilation/ perfusion ratio
QS/QT shunt fraction =(PAO2-CaO2)/PAO2-CvO2)
BE: +2 to -2 mEq/L
pH< 7.35 and PaCO2>45 indicates respiratory acidosis
pH>7.45 and PaCO2<35 indicates respiratory alkalosis
pH<7.35 and HCO3 <22 indicates metabolic acidosis
pH>7.45 and HCO3 >26 indicates metabolic alkalosis
Created by: amers72