Which statement is true regarding the diameter of a needle?

The statement that the lower the gauge of a needle, the larger the diameter of the needle is accurate and reflects the standard measurement system used for needles. Gauge is a unit of measurement that inversely corresponds to the diameter of the needle; as the gauge number decreases, the needle's diameter increases. This means that a 16-gauge needle has a larger diameter than a 30-gauge needle, for example.

Understanding this relationship is crucial in veterinary practice as it influences the choice of needle for various procedures, such as injections or blood draws. The larger needles are typically used for viscous solutions or larger volumes, while smaller needles are used for more delicate procedures or smaller volumes. Thus, the gauge serves as a helpful guideline for selecting the appropriate needle thickness required for a specific medical task.