What gauge sizes are typically used for small gauge over-the-needle catheters?

The correct answer identifies the typical gauge sizes for small gauge over-the-needle catheters, which usually range from 24 to 27 gauge. These sizes are specifically designed for procedures that require a smaller diameter catheter, allowing for easier placement in smaller veins, which is crucial in pediatric or elderly patients or for infusing medications that require lower flow rates.

The choice of smaller gauge sizes, such as 24g and 27g, enables healthcare providers to minimize the trauma to the blood vessel while accessing the vascular system for intravenous (IV) therapy. These types of catheters are often used for intravenous access in situations where larger catheters may be too traumatic or impractical.

Other gauge sizes listed are not typically categorized as "small gauge." For instance, 18g and 20g are considered medium gauge catheters, which are commonly used for blood draws or for situations where a larger flow rate is necessary, such as when administering large volumes of fluid. Therefore, they don't fit the criteria for "small gauge" catheters. Similarly, a 16g catheter is even larger and is typically used in emergency situations for rapid infusion of fluids or blood products. The correct identification of the 24-27g range effectively