Figure 1. Flow of Patients in a Study of Lower Tidal Volume Facilitated by Extracorporeal Carbon Dioxide Removal in Patients With Acute Hypoxemic Respiratory Failure.

^aPatients could meet more than 1 ineligibility criterion.

^bChild-Pugh score >11.

^cOther was used when the reason for a patient’s exclusion was not among those predefined in the protocol; the most commonly specified free-text explanations included rapid improvement or deterioration in clinical status.

^dRandomization was stratified by site.

^eThis patient was randomized twice in error and was randomized to the same group.