ToolsCalculators
Static Lung Compliance (Cstat)
Static Lung Compliance (Cstat)
Tidal volume
mL
Plateau pressure
cmH2O
PEEP (total)
cmH2O
Complete the fields above to see the result.
When to use
- Tracking respiratory mechanics and lung stiffness in mechanically ventilated patients.
Formula
Cstat = tidal volume / (plateau pressure - total PEEP). Normal is roughly 50-100 mL/cmH2O.
Pearls and pitfalls
- Measure plateau pressure during an end-inspiratory hold with no spontaneous effort.
- Driving pressure (Pplat - PEEP) above ~15 cmH2O is associated with worse ARDS outcomes.