What are the ARDSNet recommended targets for tidal volume and plateau pressure?

What are the ARDSNet recommended targets for tidal volume and plateau pressure?

• A. 6 mL/kg predicted body weight; Plateau pressure < 30 cmH2O
• B. 8 mL/kg predicted body weight; Plateau pressure < 35 cmH2O
• C. 10 mL/kg predicted body weight; Plateau pressure < 40 cmH2O
• D. 4 mL/kg predicted body weight; Plateau pressure < 25 cmH2O

Answer: (A)

Minimizing ventilator-induced lung injury in ARDS relies on two linked targets: use a low tidal volume based on predicted body weight and keep the plateau pressure at a safe level. The recommended settings are around 6 mL per kilogram of predicted body weight for tidal volume, with plateau pressure limited to less than 30 cmH2O. This combination protects the already fragile, stiff lungs by preventing overdistension (volutrauma) and avoiding excessive alveolar pressure (barotrauma). The rationale comes from clinical trials showing better outcomes when tidal volumes are aligned to predicted body weight and plateau pressures are kept under 30 cmH2O. If plateau pressure stays above 30 cmH2O despite a 6 mL/kg PBW tidal volume, you would further adjust settings (like increasing PEEP or reassessing tidal volume) to recruit without increasing pressure, rather than raising tidal volume or allowing higher pressures. The other options propose larger tidal volumes or higher pressure targets, which increase the risk of lung injury.

Minimizing ventilator-induced lung injury in ARDS relies on two linked targets: use a low tidal volume based on predicted body weight and keep the plateau pressure at a safe level. The recommended settings are around 6 mL per kilogram of predicted body weight for tidal volume, with plateau pressure limited to less than 30 cmH2O. This combination protects the already fragile, stiff lungs by preventing overdistension (volutrauma) and avoiding excessive alveolar pressure (barotrauma). The rationale comes from clinical trials showing better outcomes when tidal volumes are aligned to predicted body weight and plateau pressures are kept under 30 cmH2O. If plateau pressure stays above 30 cmH2O despite a 6 mL/kg PBW tidal volume, you would further adjust settings (like increasing PEEP or reassessing tidal volume) to recruit without increasing pressure, rather than raising tidal volume or allowing higher pressures. The other options propose larger tidal volumes or higher pressure targets, which increase the risk of lung injury.