Hypercapnic Acute Respiratory Failure in the ICU : the YETI Study

Inclusion Criteria

• •patients ≥18 years old presenting with at least of the following items :
• •1. respiratory rate ≥ 25/min,
• •2. paradoxical motion of the abdomen,
• •3. intercostal retraction AND
• •a PaCO2 \> 45 cm H20 before ICU admission or within the 12 hours following ICU admission.