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What are the 4 parameters of ABG?

Published in ABG Parameters 1 min read

The 4 primary parameters assessed in an Arterial Blood Gas (ABG) analysis, based on the provided reference, are:

Parameter Description
pH Measures the acidity or alkalinity of the blood.
PaCO2 Partial pressure of carbon dioxide in arterial blood; reflects ventilation.
PaO2 Partial pressure of oxygen in arterial blood; assesses oxygenation.
Bicarbonate (HCO3-) A measure of the bicarbonate level in the blood, crucial for acid-base balance.

ABG analysis is crucial for evaluating a patient's oxygenation, ventilation, and acid-base balance. While the ABG report actually includes *five* key parameters – pH, PaCO2, PaO2, bicarbonate (HCO3-), and base excess – the core four parameters that are most frequently referenced are those listed in the table above. These parameters offer essential insights into the management and diagnosis of respiratory, metabolic, and systemic conditions.

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