Which gauge size is appropriate for administering saline to an infant via a peripheral catheter?

The 24-gauge catheter is the most appropriate choice for administering saline to an infant via a peripheral catheter. This gauge size is specifically designed for smaller veins typically found in infants and neonates, minimizing the risk of vein damage and resolving the challenge of finding a suitable vein for infusion.

Using a smaller gauge (higher number) allows for a slower flow rate, which is essential when dealing with the delicate circulatory system of an infant. It ensures that the saline can be administered at a safe rate without overwhelming the infant's circulatory system. Furthermore, it limits discomfort and potential trauma associated with larger gauge catheters that may not be suitable for such a small patient population.

In the clinical setting, catheter and gauge selection should always consider the patient's age, size, and specific medical needs, with a preference for minimal invasiveness and optimal flow for the required treatment.