A health care worker received an annual tuberculosis test administered 56 hours ago. The injection site is very red and flat. The certified nurse who is reading the test should take which action?
a. Advise the health care worker another test must be done because the test was not read within the proper time.
b. Tell the health care worker the results are positive and cannot return to work.
c. Document the results as a negative reac-tion.
d. Measure the area in millimeters.
C
A reddened flat area is not a positive reaction, and you do not need to measure it.
Tuberculosis skin testing positive results is a palpable, elevated, hardened area around the injec-tion site, caused by edema and inflammation from the antigen-antibody reaction, measured in millimeters. Tuberculin skin tests are read between 48 and 72 hours so the health care worker came at the right time (56 hours).
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