CRNE Canadian Registered Nurse

Answer: B - The client is said to have a positive PPD skin test if the injected site demonstrates an indurated wheal measuring over 10 millimeters in diameter in 48 to 72 hours. A flat, circumscribed area is not considered a positive test. For those who were born and raised in regions where tuberculosis is endemic, a test is considered positive if the induration measures more than 10 millimeters. Clients with immunocompromised immune systems test positive if the induration measures more than 5 millimeters. In a healthy individual with no known risk factors, a positive test is made when the induration measures at least 15 millimeters.