What gauge is typically used for intradermal needle injections?

The typical gauge used for intradermal needle injections is between 25 and 28 gauge. This size is optimal because intradermal injections are often used for administering small amounts of medication, such as allergens for allergy tests or vaccines. The smaller gauge needles are less painful and cause minimal tissue trauma, which is crucial since the injection is delivered into the dermis just beneath the skin's surface.

A gauge of 25 to 28 allows for a fine, precise delivery of the substance into the skin, ensuring that it stays localized in the dermal layer where it’s meant to act. Smaller gauges also help minimize any bruising or irritation in the skin, making it a preferred choice for intradermal procedures. Therefore, the selection of 25 to 28 gauge needles specifically caters to the needs of intradermal injections.