Final answer:
A sodium-controlled diet is often used to prevent fluid retention and may be recommended for the treatment of congestive heart failure. In patients with heart failure, there may be excessive fluid volume caused by retention of water and sodium.
Step-by-step explanation:
A sodium-controlled diet is often used to prevent fluid retention and may be recommended for the treatment of congestive heart failure. In patients with heart failure, there may be excessive fluid volume caused by retention of water and sodium. Sodium plays a larger role in the osmolarity of the plasma than any other circulating component of the blood. If there is too much sodium present, it can lead to an increase in total volume of water, which can result in hypertension and other complications.