Berlin ARDS Severity Classification — free guideline decision tool
Berlin definition of ARDS, classifying severity by PaO₂/FiO₂ measured under PEEP/CPAP ≥ 5 cmH₂O.
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
Runs in your browser
No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| PaO₂/FiO₂ (with PEEP/CPAP ≥ 5) | 150 mmHg |
|---|
→ClassModerate ARDS
- P/F：150 mmHg
- In-hospital mortality (approx.)：≈32%
Common questions
What is Berlin ARDS Severity Classification?
Berlin definition of ARDS, classifying severity by PaO₂/FiO₂ measured under PEEP/CPAP ≥ 5 cmH₂O.
How is Berlin ARDS Severity Classification calculated? What is the core formula?
All four criteria required (acute onset ≤ 1 week, bilateral infiltrates, not fully cardiac/volume, PEEP/CPAP ≥ 5); severity by P/F: mild 200–300, moderate 100–200, severe ≤ 100.
When is Berlin ARDS Severity Classification used?
Use to confirm the ARDS definition and classify mild/moderate/severe to guide ventilatory strategy.
What are the key clinical points for Berlin ARDS Severity Classification?
Oxygenation must be assessed under PEEP/CPAP ≥ 5 cmH₂O, or the P/F-based severity is invalid (original synthesis · not guideline verbatim). ARDS is a clinical syndrome — the three non-oxygenation criteria must also be satisfied, excluding pure cardiogenic edema. Severe ARDS (P/F ≤ 100) is where prone positioning, neuromuscular blockade, and ECMO referral are most relevant.
What are the limits and cautions when using Berlin ARDS Severity Classification?
For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
How is Berlin ARDS Severity Classification calculated in practice? Can you show a worked example?
Inputs: PaO₂/FiO₂ (with PEEP/CPAP ≥ 5) 150 mmHg → Result: Class Moderate ARDS（P/F: 150 mmHg, In-hospital mortality (approx.): ≈32%）
Run Berlin ARDS Severity Classification now
Berlin definition of ARDS, classifying severity by PaO₂/FiO₂ measured under PEEP/CPAP ≥ 5 cmH₂O.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.
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