"Correlation Between PaO2/FiO2 and Lung Ultrasound Score in Patients Admitted to an Intensive Care Unit With Interstitial Syndrome"

The goal of this physiological interventional prospective study is to evaluate the improvement of the previously demonstrated correlation between PaO2/ FiO2 and Lung Ultrasound score (LUSS) in patients admitted in the ICU with an intesrtitial syndrom (IS) on the ultrasound of all aetiologies at inclusion and at twenty four and forty eight hours.The main question it aims to answer is if the LUSS is a valid tool to evaluate the severity of the IS Participants will initially have an arterial blood gas to evaluate the PaO2/FiO2 and in the ten minutes a lung ultrasound to evaluate the LUSS. This will be repeated at twenty four and forty eight hours.

Inclusion Criteria:- consent->17 years oldExclusion Criteria:LUSS < 2Non Inclusion Criteria:Patient with pathologies leading to chronic ISChronic Obstructive Pulmonary Disease (COPD) or active asthmaPatients under veino-veinous or veino-arterial " Extracorporeal Membrane Oxygenation " (ECMO)Severe trauma patientsLess than twenty-four hours post operative patientsLUS not feasible: prone position, pneumonectomy history, severe obesity