What are the Berlin Definition ARDS severity categories?

The Berlin Definition classifies ARDS into three mutually exclusive categories based on PaO2/FiO2 ratio with PEEP ≥5 cmH2O: Mild (200 < P/F ≤ 300), Moderate (100 < P/F ≤ 200), and Severe (P/F ≤ 100). Hospital mortality correlates with severity: ~27% for mild, ~32% for moderate, and ~45% for severe ARDS.

What other criteria must be met for ARDS diagnosis?

In addition to the P/F ratio threshold, ARDS requires: acute onset within 1 week of a known clinical insult or new/worsening respiratory symptoms; bilateral opacities on chest imaging not fully explained by effusions, lobar collapse, or nodules; and respiratory failure not fully explained by cardiac failure or fluid overload. An echocardiogram is recommended if cardiac origin cannot be excluded clinically.

Berlin ARDS Severity Definition

Classify ARDS severity (mild, moderate, severe) using the 2012 Berlin Definition based on onset timing, oxygenation, PEEP requirements, bilateral infiltrates, and exclusion of cardiac origin.

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Frequently Asked Questions

What are the Berlin Definition ARDS severity categories?

What other criteria must be met for ARDS diagnosis?