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ABG's
ABG's and their values
Term | Definition |
---|---|
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 |