What are the Berlin ARDS severity categories?

Mild ARDS: PF ratio 200-300 with PEEP ≥5; Moderate: PF ratio 100-200 with PEEP ≥5; Severe: PF ratio <100 with PEEP ≥5; all require bilateral opacities on CXR/CT not explained by effusions/collapse/nodules.

How is predicted body weight calculated for lung protective ventilation?

Males: PBW = 50 + 0.91(height cm - 152.4); Females: PBW = 45.5 + 0.91(height cm - 152.4); tidal volume 6 mL/kg PBW (range 4-8); never use actual body weight (leads to large VT in obese patients).

What driving pressure target reduces ARDS mortality?

Driving pressure = Pplat - PEEP; driving pressure <14-15 cmH2O is associated with lower mortality in retrospective analyses; minimizing driving pressure is the mechanical rationale for using the ARDSnet PEEP/FiO2 tables.

When should prone positioning be used in ARDS?

Prone positioning for ≥16 hours/day in severe ARDS (PF <150) reduces 28-day mortality (PROSEVA trial: 16% vs 32.8%); initiate within 36 hours of ARDS diagnosis; contraindications: spine instability, severe facial trauma, open chest.

What is the role of ECMO in refractory ARDS?

Venovenous ECMO for severe ARDS (PF <80 with PF <150 and pH <7.25 despite optimization) provides gas exchange support allowing ultra-protective ventilation; CESAR and EOLIA trials support selective ECMO use in expert centers.

ARDS Berlin Classification and Lung Protective Ventilation Calculator

Applies Berlin ARDS criteria (PaO2/FiO2 with PEEP ≥5 cmH2O, bilateral infiltrates, non-cardiac origin), calculates predicted body weight for 6 mL/kg tidal volume, driving pressure, and plateau pressure targets.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.

How to Use

Enter the values for the scenario you are assessing. Applies Berlin ARDS criteria (PaO2/FiO2 with PEEP ≥5 cmH2O, bilateral infiltrates, non-cardiac origin), calculates predicted body weight for 6 mL/kg tidal volume, driving pressure, and plateau pressure targets. Use the ards berlin score result to inform your calculation.

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