A nurse is assisting with care for a client who received a tuberculin skin test 72 hr ago. When collecting data from the test site, which of the following findings indicates a need for further testing?
Nonpalpable area of redness, less than 5 mm (0.2 in) in diameter
Area of ecchymosis, greater than 12 mm (0.5 in) in diameter
Tenderness at the injection site
Palpable area of induration, greater than 10 mm (0.4 in) in diameter
The Correct Answer is D
Palpable area of induration, greater than 10 mm (0.4 in) in diameter. This indicates a positive tuberculin skin test (TST) reaction for a person with no known risk factors for TB infection. A positive TST reaction means that the person has been infected with Mycobacterium tuberculosis, the bacterium that causes TB disease, and needs further testing to confirm the diagnosis and rule out active TB disease.
The other choices are not correct because:
- Choice A. Nonpalpable area of redness, less than 5 mm (0.2 in) in diameter. This indicates a negative TST reaction for any person, regardless of their risk factors for TB infection. A negative TST reaction means that the person has not been infected with Mycobacterium tuberculosis or has a very low level of immune response to the bacterium.
- Choice B. Area of ecchymosis, greater than 12 mm (0.5 in) in diameter. This indicates a bruise or bleeding under the skin, not a TST reaction. Ecchymosis is not caused by the injection of tuberculin purified protein derivative (PPD) into the skin, but by trauma or injury to the blood vessels.
- Choice C. Tenderness at the injection site. This indicates a mild local reaction to the injection of tuberculin PPD into the skin, not a TST reaction. Tenderness is not measured in millimeters of induration (firm swelling), which is the standard way of reading TST results.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","D"]
Explanation
The correct answer is Choice A, Choice D.
Choice A rationale: Tachycardia, or an increased heart rate, is a common symptom of dehydration in infants. The body attempts to maintain adequate blood circulation despite reduced fluid volume by increasing the heart rate, which is a compensatory mechanism.
Choice B rationale: Bloating is not typically associated with dehydration in infants. Dehydration usually results in symptoms like dry mucous membranes and decreased skin turgor, rather than gastrointestinal symptoms like bloating.
Choice C rationale: Hypertension, or high blood pressure, is uncommon in dehydrated infants. Dehydration generally leads to hypotension (low blood pressure) due to decreased fluid volume in the circulatory system, which can result in reduced blood pressure.
Choice D rationale: Irritability is a frequent symptom of dehydration in infants. Reduced fluid intake and electrolyte imbalances can cause discomfort and distress, leading to irritability and increased fussiness in dehydrated infants.
Correct Answer is A
Explanation
"Phototherapy." This is a common treatment for psoriasis and involves exposure to ultraviolet light. Choice B is not correct because dermabrasion is not routinely used for the treatment of psoriasis.
Choice C is not correct because benzoyl peroxide is used to treat acne, not psoriasis.
Choice D is not correct because oil-based ointments can actually make psoriasis worse.
Choice B: Dermabrasion is not used to treat psoriasis.
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