Intravenous fluid regulation is the control of the amount of fluid you receive intravenously, or through your bloodstream. The fluid is given from a bag connected to an intravenous line. This is a thin tube, often called an IV, that’s inserted into one of your veins.Fluids are administered this way for various reasons, all of which require control of the amount given. Without control, the rate of fluid administration relies on gravity alone. This can result in receiving either too much or too little fluid.The flow in an IV is regulated either manually or by using an electric pump. Regardless of how flow is regulated, nurses or medical caregivers must check IVs regularly to ensure both rate of flow and delivery of the correct dosage.