Comparison of the pulmonary dead-space fraction derived from ventilator volumetric capnography and a validated equation in the survival prediction of patients with acute respiratory distress syndrome.

Purpose This prospective observational study aims to evaluate the accuracy of dead-space fraction derived from the ventilator volumetric capnography (volumetric CO2) or a prediction equation to predict the survival of mechanically ventilated patients with acute respiratory distress syndrome (ARDS).