What is the primary reason for using a larger gauge catheter?

The primary reason for using a larger gauge catheter is to allow for rapid infusion of larger volumes. Larger gauge catheters have a wider lumen, which significantly increases the flow rate of fluids and medications. This is especially critical in emergency situations where a quick response is necessary, such as for fluid resuscitation in cases of shock or trauma. The ability to infuse larger volumes quickly can be life-saving, helping to restore blood volume and stabilize a patient’s condition more efficiently.

It's important to understand that while other factors, such as patient comfort or risk of infection, may also play a role in catheter selection, the main advantage of a larger gauge catheter remains its capacity to facilitate high-flow rates when necessary.