Which route is used for administering Tuberculosis (TB) skin tests?
Subcutaneous
Intradermal
Enteral
Intramuscular (IM)
The Correct Answer is B
A. Subcutaneous: Subcutaneous injections deliver medication into the fatty tissue beneath the skin. This route is used for vaccines like MMR or insulin in some cases but is not appropriate for TB skin testing, as it does not produce the localized reaction needed for accurate reading.
B. Intradermal: The TB (Mantoux) test is administered intradermally, just beneath the epidermis, to elicit a localized immune response. Proper placement allows formation of a raised wheal, which can be measured 48–72 hours later to determine exposure to Mycobacterium tuberculosis.
C. Enteral: Enteral routes involve the gastrointestinal tract, such as oral or via feeding tube. This route is not suitable for TB testing, as the immune response must occur locally in the skin for accurate interpretation.
D. Intramuscular (IM): IM injections deliver medication into muscle tissue, providing systemic absorption for vaccines or medications. This route is not used for TB testing because it would not create a localized dermal reaction necessary for evaluation.
Nursing Test Bank
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Related Questions
Correct Answer is A
Explanation
A. Pull the skin laterally with the non-injecting hand and maintain this position until the needle is withdrawn slowly, and release the skin slowly: The Z-track technique displaces subcutaneous tissue to create a zigzag path, preventing medication from leaking into subcutaneous tissue. Maintaining lateral tension during injection and slow withdrawal ensures proper deposition and minimizes tissue irritation.
B. Pull the skin taut with the forefinger and thumb of the non-dominant hand before needle insertion: Pulling the skin taut is not part of the Z-track method and does not create the necessary tissue displacement. This technique is more appropriate for standard intramuscular injections without irritant medications.
C. Release the displaced skin quickly before removing the needle to minimize skin trauma: Releasing the skin before needle withdrawal would allow medication to track back into subcutaneous tissue, increasing irritation and tissue staining. Maintaining tension until withdrawal is critical.
D. Massage the injection site vigorously after needle withdrawal to disperse the medication and reduce pain: Massaging an irritant IM injection site can worsen tissue damage, cause staining, and increase discomfort. The Z-track technique is designed to prevent the need for post-injection massage.
Correct Answer is D
Explanation
A. Capsule: A capsule contains medication enclosed in a gelatin shell, which may contain powder, liquid, or granules. It is not a liquid form dissolved in water or saline.
B. Syrup: A syrup is a sweetened liquid preparation containing medication dissolved in sugar and water. While liquid, it is typically used for taste masking and is not the standard term for a medication simply dissolved in water or saline.
C. Suspension: A suspension contains medication particles dispersed in a liquid but not fully dissolved. The particles may settle over time and require shaking before administration.
D. Solution: A solution is a homogeneous liquid preparation in which the medication is completely dissolved in a solvent such as water or saline. It allows for uniform dosing and immediate absorption when administered.
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