ABG Lab

Interpret arterial blood gases instantly. pH, PaCO₂, HCO₃ → acid-base disorder, compensation, anion gap, lactate grading, P/F ratio. Professional reference for clinicians and ICU teams.

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Four Modules

ABG Interpreter

Enter pH, PaCO₂, and HCO₃ for instant acid-base classification (respiratory/metabolic acidosis or alkalosis), compensation assessment (Winters' formula, acute/chronic), and mixed disorder detection.

Anion Gap

AG = Na − (Cl + HCO₃). Albumin-corrected AG (+2.5 per 1 g/dL below 4.0). Delta ratio for mixed HAGMA/NAGMA identification.

Lactate

Grade serum lactate: normal (<2 mmol/L), hyperlactatemia (2–3.9), lactic acidosis (≥4). Combine with systolic BP for shock classification (cryptic / septic shock criteria).

Oxygenation

P/F ratio = PaO₂/FiO₂ with Berlin ARDS classification (mild/moderate/severe). A-a gradient with age-adjusted normal range. FiO₂ quick presets (0.21, 0.40, 1.0).

Evidence-Based References

ABG Interpretation — Marino's ICU Book, 4th edition

ARDS Classification — Berlin Definition, JAMA 2012

Lactate — Levy et al., Crit Care Med 2014; Vincent septic shock criteria

A-a Gradient — West's Respiratory Physiology, 10th edition

Privacy

ABG Lab works entirely offline. No account, no server, no analytics. All calculations happen on your device. Values you enter are never stored or transmitted.

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Disclaimer

ABG Lab is intended for educational and reference use only. Results should not replace clinical judgment or professional medical advice.