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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 |