Fluid therapy is widely used to improve organ perfusion and survival in critically patients. Fluid therapy is an important component of intensive care management; however, optimal fluid management is unknown. Inadequate or excessive fluid resuscitation, on the other hand, is linked with a poor prognosis; the former can cause tissue hypo-perfusion and exacerbate organ dysfunction, while the latter can raise the risk of heart failure, pulmonary edema, and pleural effusions. Ventilator-associated lung injury (VALI) is a devastating complication of assisted mechanical ventilation (MV) and is one of the root causes of prolonged MV.