Arterial Blood Gas Calculator
Interpret ABG results to diagnose acid-base disorders. Calculate A-a gradient and assess oxygenation status.
ABG Values
Normal: 7.35-7.45
mmHg
Normal: 35-45 mmHg
mEq/L
Normal: 22-26 mEq/L
mmHg
Normal: 80-100 mmHg
%
Room air: 21%
Primary Disorder
Normal
pH: 7.40
📊A-a Gradient
4.7 mmHg
🫁P/F Ratio
452
🔬PAO2
99.7 mmHg
💨Oxygenation
Normal
Compensation Status
None
ABG Interpretation Guide
Primary Disorders
- Respiratory Acidosis: Low pH, High pCO2
- Respiratory Alkalosis: High pH, Low pCO2
- Metabolic Acidosis: Low pH, Low HCO3
- Metabolic Alkalosis: High pH, High HCO3
P/F Ratio Interpretation
- >400: Normal lung function
- 300-400: Mild impairment
- 200-300: Moderate impairment (ALI)
- <200: Severe impairment (ARDS)