What is the plateau pressure goal in ARDS management?

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What is the plateau pressure goal in ARDS management?

Limiting plateau pressure is central to lung-protective ventilation in ARDS. Plateau pressure is the pressure in the small airways and alveoli during an inspiratory hold when airflow is momentarily stopped; it reflects the distending pressure across the lung tissue, independent of airway resistance. In ARDS, the goal is to keep this distending pressure below about 30 cm H2O to minimize ventilator-induced lung injury, specifically barotrauma and volutrauma, while delivering a low tidal volume (around 6 ml/kg predicted body weight). If plateau pressure climbs toward or above 30 cm H2O, you would typically reduce the tidal volume or adjust PEEP to prevent overdistension of fragile alveoli. The idea is that high plateau pressures correlate with worse outcomes due to excessive stress on injured lungs. Peak pressure alone isn’t as protective a metric because it reflects both airway resistance and alveolar pressure; plateau pressure isolates the pressure actually distending the alveoli. That’s why the target is less than 30 cm H2O, not as low as 15 or 20, and not as high as 50. The other values would either risk inadequate ventilation or fail to protect the lungs from injury.

Limiting plateau pressure is central to lung-protective ventilation in ARDS. Plateau pressure is the pressure in the small airways and alveoli during an inspiratory hold when airflow is momentarily stopped; it reflects the distending pressure across the lung tissue, independent of airway resistance. In ARDS, the goal is to keep this distending pressure below about 30 cm H2O to minimize ventilator-induced lung injury, specifically barotrauma and volutrauma, while delivering a low tidal volume (around 6 ml/kg predicted body weight).

If plateau pressure climbs toward or above 30 cm H2O, you would typically reduce the tidal volume or adjust PEEP to prevent overdistension of fragile alveoli. The idea is that high plateau pressures correlate with worse outcomes due to excessive stress on injured lungs. Peak pressure alone isn’t as protective a metric because it reflects both airway resistance and alveolar pressure; plateau pressure isolates the pressure actually distending the alveoli.

That’s why the target is less than 30 cm H2O, not as low as 15 or 20, and not as high as 50. The other values would either risk inadequate ventilation or fail to protect the lungs from injury.

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