At what angle is an intradermal injection administered?

An intradermal injection is administered at a 15-degree angle relative to the surface of the skin. This angle allows the needle to be inserted just below the epidermis into the dermal layer, which is essential for the proper delivery of substances such as vaccines or allergens intended for diagnostic testing. The shallow insertion is designed to ensure that the medication remains within the dermis, where it can elicit the desired immune response while minimizing discomfort and reducing the risk of injecting too deeply into the subcutaneous tissue.

In contrast, other angles such as 30 degrees, 45 degrees, or 90 degrees correspond to different types of injections, such as subcutaneous or intramuscular, each of which has its own specific technique and purpose. Thus, understanding the proper angle for intradermal injections is crucial for effective patient care and achieving the intended therapeutic outcomes.