What is true about the gauge of a needle?

The understanding of needle gauge is fundamental in administering medications effectively. The gauge of a needle refers to its diameter; specifically, a lower gauge number indicates a larger lumen, or opening, of the needle. This is critical when selecting a needle for specific types of injections or infusions, as different procedures may require different sizes for optimal medication delivery.

For instance, when drawing up thicker substances, such as certain viscous medications, a lower gauge needle is preferable due to its larger diameter, which allows for easier passage of the liquid. Conversely, a higher gauge needle, which has a smaller lumen, is typically used for procedures that require more precision or less trauma to the tissue, such as in insulin injections.

Understanding that the gauge and lumen diameter are directly related is essential in clinical settings, ensuring that healthcare providers can select the appropriate needle for each individual patient and medication type. This knowledge enhances both safety and comfort during injections.