Final answer:
Intradermal injections are given into the dermis layer of the skin and are often used for diagnostic purposes. The needles used for intradermal injections are typically 26-27 gauge, and the injection is given at a 5-15 degree angle to the skin.
Step-by-step explanation:
Intradermal injections are given into the dermis layer of the skin, just below the epidermis. They are often used for diagnostic purposes, such as administering a tuberculin skin test or an allergy test.
The needles used for intradermal injections are typically 26-27 gauge, and the length of the needle is usually 1/4 to 1/2 of an inch. The injection is given at a 5-15 degree angle to the skin.
One example of an intradermal injection is the Mantoux test, which is used to detect tuberculosis infection. A small amount of tuberculin is injected into the skin and then observed for a specific reaction.