The purpose of the study is to investigate venous congestion using hepatic vein doppler for ICU patients with invasive mechanical ventilastion. The primary outcome is the systolic to diastolic hepatic vein velocity ratio S/D . The objective is to find a significant association between S/D and different congestion indicators.

Inclusion Criteria:

• intubated for more than 24 hours

Exclusion Criteria:

• Chronic end-stage renal disease on admission
• Atrial Fibrillation
• Cirrhosis
• Portal thrombosis
• Refusal to participate
• non-opposition could not be obtained from themselves or their trusted support person in the event of incapacity
• Under legal protection.

Patients were included if they were intubated for more than 24 hours. Patients were excluded if they had chronic end-stage renal disease on admission, atrial fibrillation, cirrhosis, portal thrombosisrefusal to participate, whose non-opposition could not be obtained from themselves or their trusted support person in the event of incapacity or if they were under legal protection.

S/D velocity ratio was measured as well as veinous congesion parameters such as weight variation, cumulative fluid balance, peripheral edema, central venous pressure, urine output and acute kidney failure KDIGO stage.

All collected data that underlie results in a publication

Data will be available beginning three years and ending fifteen years following the final study report completion

Data access requests will be reviewed by the internal committee of Brest UH. Requestors will be required to sign and complete a data access agreement