A nurse is having a yearly employee tuberculin skin test. Which skin test results would indicate a positive result?
A) An induration of 12 mm
B) An uneven erythemic area
C) An induration of less than 1 mm
D) An induration of 4 mm
A
Feedback:
The size of the induration, not including the surrounding area of erythema, is measured in millimeters. The measurement determines whether the reaction is significant. For example, a tuberculin skin test is test is considered positive if the induration is 10 mm or greater in persons with no known risk factors for TB; smaller measurements are significant in certain risk groups, such as immunocompromised clients. The other answers are not indicative of positive results.
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