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 {"dropdown-group-1":"D"}
Explanation
A. Indirectly: Infusion pumps do not control fluid delivery indirectly; they provide precise, direct control over both rate and volume. Indirect regulation would rely on manual estimation or gravity, which lacks accuracy.
B. Manually: Manual regulation involves using roller clamps or gravity drips, which are prone to error and cannot ensure consistent infusion rates. Infusion pumps are specifically designed to minimize manual adjustments.
C. Occasionally: Infusion pumps provide continuous control rather than intermittent or occasional regulation. Sporadic adjustments would defeat the purpose of automated delivery and compromise safety.
D. Automatically: Infusion pumps are engineered to automatically deliver fluids and medications at predetermined rates and volumes, ensuring accuracy and consistency. This reduces the risk of under- or over-infusion and enhances patient safety.
Correct Answer is B
Explanation
A. 2.0 mg: Writing a trailing zero before the decimal point can cause a tenfold overdose if the decimal is missed or misread. This is a high-risk notation and is not recommended for safety.
B. 0.2 mg: Leading zeros before a decimal point are required for doses less than one to prevent misinterpretation. “0.2 mg” clearly indicates two-tenths of a milligram and minimizes the risk of a tenfold dosing error.
C. 0.20 mg: Although technically correct, the extra zero may be unnecessary and could be misinterpreted in some handwritten contexts. The standard safe practice emphasizes clarity and minimal ambiguity, which “0.2 mg” provides.
D. 2 mg: This represents two milligrams, not two-tenths of a milligram. Using this notation would result in a tenfold overdose if intended as 0.2 mg.
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