Progression to critical state (It will measured like Yes/No; established from the criticality state; and the main evaluation measure is based on the PO2 / Fi02 relationship). Measurement time: during the stay in the ICU.

Progression to critical state (It will measured like Yes/No; established from the criticality state; and the main evaluation measure is based on the PO2 / Fi02 relationship). Measurement time: during the stay in the ICU.