A nurse is preparing to administer an intradermal injection for a client who requires a tuberculin skin test. What actions should the nurse plan to take?

Place a 1-inch needle on the syringe.

Hold the syringe at a 20° angle to the client’s skin.

Draw up 0.5 mL of purified protein derivative (PPD) from the vial.

Pinch the skin at the chosen site with the non-dominant hand before inserting the needle.

Answer and Explanation

The Correct Answer is D

The correct answer is Choice D

Choice A rationale: A 1-inch needle is typically used for intramuscular injections, not intradermal administration. Intradermal injections require a short, fine-gauge needle—usually ¼ to ⅝ inch in length and 25 to 27 gauge—to ensure accurate placement within the dermis. Using a longer needle increases the risk of injecting into subcutaneous tissue, which alters absorption and invalidates the test. Scientific technique demands precise needle selection based on anatomical depth and pharmacokinetics of the test substance.

Choice B rationale: A 20° angle is inappropriate for intradermal injections, which require a shallow angle of 5° to 15° to ensure deposition within the dermal layer. Angles greater than 15° risk penetrating into subcutaneous tissue, compromising test accuracy and absorption kinetics. The dermis is a narrow layer between the epidermis and subcutaneous fat, and precise angulation is critical for forming the characteristic wheal and ensuring localized immune response. Scientific technique mandates strict adherence to angle parameters.

Choice C rationale: The standard volume for a tuberculin skin test using purified protein derivative (PPD) is 0.1 mL, not 0.5 mL. Administering 0.5 mL would exceed the recommended dose, potentially causing excessive local reaction, invalid test results, and patient discomfort. The Mantoux method requires exact dosing to elicit a controlled immune response for accurate interpretation. Scientific protocol emphasizes precision in volume to maintain test validity and minimize adverse effects. Overdosing violates established guidelines.

Choice D rationale: Pinching or gently pulling the skin taut at the injection site stabilizes the dermal layer and facilitates correct needle placement. This technique ensures the needle enters at the proper angle and depth, allowing formation of a visible wheal, which confirms intradermal delivery. It also minimizes patient discomfort and prevents misplacement into deeper tissues. Scientific technique for intradermal injections prioritizes anatomical control and tactile feedback to optimize accuracy and diagnostic reliability.

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Correct Answer is A

Explanation

Choice A rationale
Turning the patient on their side before starting oral care is a recommended practice when caring for an unresponsive patient. This position helps prevent aspiration, which can occur if the patient cannot swallow properly.
Choice B rationale
Applying petroleum jelly to the patient’s lips after oral care can help prevent dryness and cracking. However, it’s not the primary action the nurse should take when performing oral hygiene for an unresponsive patient.
Choice C rationale
Using the thumb and index finger to keep the patient’s mouth open is not recommended. It can cause discomfort and potential injury to the patient.
Choice D rationale
Using a stiff toothbrush to clean the patient’s teeth is not recommended. A soft toothbrush is usually used to clean the teeth of an unresponsive patient to prevent damage to the gums.

A. Toe B. Finger C. Skin fold D. Earlobe

Correct Answer is D

Explanation

Choice A rationale
Applying the pulse oximeter probe to the toe might not provide an accurate reading if the client has poor peripheral circulation. Additionally, thickened toenails can interfere with the reading.
Choice B rationale

Edema in the hands can affect the accuracy of a pulse oximeter reading. The probe might not fit properly or provide a reliable reading if the finger is swollen.
Choice C rationale
Applying the pulse oximeter probe to a skin fold is not recommended. The probe needs to be placed on a relatively flat, thin area of skin to accurately measure oxygen saturation.
Choice D rationale
The earlobe is a suitable alternative site for pulse oximetry if the fingers and toes are not viable options. The earlobe is typically less affected by peripheral vasoconstriction, which can occur with hypothermia, certain medications, and certain diseases. Therefore, Choice D is the correct answer.

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A nurse is preparing to administer an intradermal injection for a client who requires a tuberculin skin test. What actions should the nurse plan to take?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse in a long-term care facility is taking care of a patient who is unresponsive. What action should the nurse take when performing oral hygiene for the patient?

Correct Answer is A

Explanation

A nurse is preparing to measure a client’s oxygen saturation and notes edema of the client’s hands and thickened toenails. Where should the nurse apply the pulse oximeter probe?

Correct Answer is D

Explanation

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