Hepatic Doppler to Assess Venous Congestion During Invasive Mechanical Ventilation (DOHECOV)

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.