The nurse is performing tuberculosis (TB) skin tests in a clinic that has many patients who have immigrated to the United States. Which question is most important for the nurse to ask before the skin test?
a. "Is there any family history of TB?"
b. "How long have you lived in the United States?"
c. "Do you take any over-the-counter (OTC) medications?"
d. "Have you received the bacille Calmette-Guérin (BCG) vaccine for TB?"
ANS: D
Patients who have received the BCG vaccine will have a positive Mantoux test. Another method for screening (such as a chest x-ray) will need to be used in determining whether the patient has a TB infection. The other information also may be valuable but is not as pertinent to the decision about doing TB skin testing.
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