Overview

Mechanical ventilation in ARDS requires protective ventilation with low VT and PEEP. PEEP titration can improve lung recruitment in the dependent lung but with a risk of overdistension in the non-dependant lung. EIT can measure the distribution of tidal ventilation and assess overdistension and collapse during a PEEP titration in any position (prone or not).

This study aims to measure the best PEEP as a compromise between recruitment and overdistension during a PEEP trial with EIT before and just after PP.

Eligibility

Inclusion Criteria:

• Patients hospitalized in the ICU and who suffered moderate or severe ARDS (Berlin criteria, PaO2/FiO2<150), intubated sedated, under myorelaxant and equipped with EIT
• Over the age of 18.

Exclusion Criteria:

• Broncho-pleural leaks
• Pregnant or breastfeeding woman.
• Guardianship or curatorship
• Deprived of liberty
• No health insurance
• Impossibility to correctly position the EIT belt (e.g., dressings, chest drainage, etc.)
• Contra indications to EIT (e.g., implantable cardiac defibrillator, pacemaker, instable spinal lesions)