What is the main factor affecting the rate of IV flow?

The rate of IV flow is primarily influenced by the height of the IV solution bag in relation to the patient. The gravitational force acting on the IV solution plays a significant role in the rate at which the fluid is infused into the patient. When the IV bag is positioned higher, gravity helps to pull the fluid down through the IV tubing and into the patient’s bloodstream, resulting in a faster flow rate. Conversely, if the bag is lower than the patient or at the same level, the flow rate can decrease significantly due to the absence of gravitational pull assisting the flow.

While other factors, such as the type of IV catheter used, can influence the flow rate, they typically do so in conjunction with the relationship of the IV bag's height and the flow dynamics in the system. Ultimately, positioning the IV solution bag appropriately is fundamental for maintaining an optimal flow rate.