Which ABG analytes are directly measured?

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Multiple Choice

Which ABG analytes are directly measured?

Explanation:
Arterial blood gas testing directly provides pH, the partial pressure of carbon dioxide (pCO2), and the partial pressure of oxygen (pO2). The bicarbonate concentration (HCO3-) is not measured directly; it’s calculated from pH and pCO2 using the Henderson-Hasselbalch equation. Sodium and potassium are electrolytes not part of the ABG panel. So the set that includes pCO2, pO2, and pH represents the analytes measured directly.

Arterial blood gas testing directly provides pH, the partial pressure of carbon dioxide (pCO2), and the partial pressure of oxygen (pO2). The bicarbonate concentration (HCO3-) is not measured directly; it’s calculated from pH and pCO2 using the Henderson-Hasselbalch equation. Sodium and potassium are electrolytes not part of the ABG panel. So the set that includes pCO2, pO2, and pH represents the analytes measured directly.

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