A large international study examined whether measurements of lung mechanics and ventilation intensity could predict outcomes in acute respiratory distress syndrome (ARDS) better than traditional oxygenation metrics. Researchers analyzed several ventilation-related parameters in 516 patients with early ARDS (mean age, 60 years) on the first day of mechanical ventilation to assess their ability to predict 90-day ICU mortality. Normalized elastance, plateau pressure, and driving pressure were all significantly associated with mortality risk.
A composite metric combining four times the driving pressure with respiratory rate also demonstrated predictive value. Overall, these indicators showed better prognostic accuracy than the traditional oxygenation index based on arterial oxygen tension to inspiratory oxygen fraction ratio (PaO₂/FiO₂). Mechanical power showed a U-shaped relationship with…
