SimpleNursing
Why Isotonic IV Solutions Cause No Fluid Shift and Risk Volume Overload
Isotonic IV solutions are fluids with the same solute concentration as the inside of your cells, so they cause no fluid shift. They are used to add fluid inside the blood vessels, and they explain why too much can cause fluid volume overload. Isotonic means equal osmotic pressure on both sides of the cell membrane, which keeps cells from gaining or losing water.