A nurse is preparing to administer an intradermal tuberculin test to a client. Which of the following actions should the nurse take?

Rationale A. Advance the needle 6 mm (1/4 in) below the skin's surface: The needle should not be advanced below the dermis because intradermal injections require placement within the superficial skin layers. Advancing too deeply can result in subcutaneous injection, which may produce a false-negative result. B. Insert the needle at a 20° angle to the client's skin: Intradermal injections should be administered at a very shallow angle, typically 5–15°, to ensure proper placement just under the epidermis. A 20° angle risks injecting too deeply and compromising test accuracy. C. Point the bevel of the needle upward prior to insertion: Keeping the bevel upward allows for smooth entry into the dermis and helps form a visible wheal, which is necessary to confirm correct intradermal placement. This technique minimizes tissue trauma and ensures the test can be accurately read. D. Administer the injection on the dorsal forearm: The recommended site for a tuberculin skin test is the inner surface of the forearm, not the dorsal side. The inner forearm provides a flat, easily accessible area that allows for accurate observation and measurement of induration.