Diagnose the cause of the fluid buildup first
Give supplemental oxygen if needed
Use diuretics to remove excess fluid when appropriate
Treat heart failure if it is the underlying cause
Restrict fluids and sodium if ordered
Perform thoracentesis to drain pleural fluid
Insert a chest tube if indicated
Use positive pressure ventilation for severe breathing difficulty
Treat infection with antibiotics if pneumonia is present
Use bronchoscopy if airway obstruction is suspected
Monitor oxygen levels, breathing, and vital signs closely
Repeat imaging or tests to confirm improvement