ABG Calculator
Interpret arterial blood gas results to diagnose acid-base disorders. Identify respiratory acidosis, metabolic alkalosis, and compensation status.
ABG Calculator
Normal Reference Ranges
pH:7.35-7.45
PaCO₂:35-45
HCO₃⁻:22-26
ABG Interpretation Steps
- Look at pH: < 7.35 = acidemia, > 7.45 = alkalemia
- Check PaCO₂: High = respiratory acidosis, Low = respiratory alkalosis
- Check HCO₃⁻: Low = metabolic acidosis, High = metabolic alkalosis
- Determine which matches the pH change (that's the primary disorder)
- Check if compensation is appropriate using formulas
What is an ABG Test?
An arterial blood gas (ABG) test measures the levels of oxygen, carbon dioxide, and pH in arterial blood. It helps assess lung function, kidney function, and the body's acid-base balance. This calculator helps interpret ABG results using standard clinical algorithms.
Normal ABG Values
- pH: 7.35 - 7.45
- PaCO2: 35 - 45 mmHg
- HCO3: 22 - 26 mEq/L
- PaO2: 80 - 100 mmHg (on room air)