What is a common medical use for the 18g IV mentioned?

The 18g IV is frequently used for several common medical practices, but its primary application is in scenarios where rapid fluid or medication delivery is essential. An 18-gauge catheter is ideal for blood transfusions, intravenous hydration, and administering medications due to its larger diameter compared to smaller gauge IVs, allowing for better flow rates.

While computed tomography (CT) scans may require intravenous contrast agents, the gauge of the IV catheter is less critical than in other scenarios since this procedure does not typically involve high flow rates or the volume of fluid needed in transfusions or hydration. Therefore, although an IV is necessary for contrast administration, it is not the primary use of the 18g IV catheter.

In practical applications, large-bore IVs like the 18g are commonly chosen for blood transfusions, where a swift and secure transfusion is vital, and for hydration needs during surgical procedures or in cases of severe dehydration. This capability to facilitate a higher volume flow makes the 18g IV particularly valuable in emergency medical situations.