A positive fluid balance in critically ill patients leads to prolonged ventilation and increased mortality [26]. Because of this, determining the volume status of critically ill patients to guide diuresis is important. Ultrasound and echocardiography are helpful in guiding clinicians in these complex decisions. Lung ultrasound looking for B lines and pleural effusions suggests pulmonary edema. E/e’ measurement, passive leg raise, and end-expiratory occlusion pressure are all accurate ways to predict the fluid status of critically ill patients. Using these techniques can help clinicians wean for mechanical ventilation faster, and reduce overall mortality.