Which nursing assessment indicates a positive reading of a tuberculin (TB) skin test?
1 day after injection with a 10-mm area of redness and swelling
2 days after injection with a 5-mm area of redness and swelling
4 days after injection with a 3-mm area of redness and swelling
5 days after injection with a 2-mm area of redness and swelling
The Correct Answer is A
A. 1 day after injection with a 10-mm area of redness and swelling:
This may suggest a positive reading, but induration size is the primary criterion for interpretation, not just redness and swelling.
B. 2 days after injection with a 5-mm area of redness and swelling:
Similar to option A, a 5-mm area of redness and swelling alone does not definitively indicate a positive TB skin test. Again, without information on the size of the induration, we cannot determine if this reading is positive.
C. 4 days after injection with a 3-mm area of redness and swelling:
Once more, a 3-mm area of redness and swelling alone does not definitively indicate a positive TB skin test. As with the previous options, the size of the induration is the critical factor for interpretation.
D. 5 days after injection with a 2-mm area of redness and swelling:
As with the other options, a 2-mm area of redness and swelling alone does not definitively indicate a positive TB skin test. The presence and size of induration are essential for accurate interpretation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Encourage the client to drink 8 glasses of water a day.
This is the correct choice. Clients with COPD often have thickened respiratory secretions due to chronic inflammation and mucus production. Adequate hydration helps to keep these secretions thin, making them easier to cough up and clear from the airways. Encouraging the client to drink plenty of fluids, such as water, can assist in maintaining optimal hydration levels and promoting effective airway clearance.
B. Instruct the client to cough every 4 hours.
Instructing the client to cough on a scheduled basis, such as every 4 hours, is not appropriate for managing COPD. While coughing is important for clearing respiratory secretions, the frequency of coughing should be based on the client's individual needs and symptoms. Some clients with COPD may need to cough more frequently, while others may need to cough less often. It's important to encourage the client to cough as needed to clear secretions rather than on a predetermined schedule.
C. Provide the client with a low-protein diet.
Providing the client with a low-protein diet is not recommended for managing COPD. Adequate protein intake is important for maintaining muscle strength, including respiratory muscles, and supporting overall health. Clients with COPD may have increased energy needs due to the increased work of breathing and should be encouraged to consume a balanced diet that includes adequate protein.
D. Advise the client to lie down after eating.
Advising the client to lie down after eating is not recommended for managing COPD. Lying down after eating can increase pressure on the diaphragm and make breathing more difficult, especially for individuals with compromised lung function. It's generally recommended for individuals with COPD to remain in an upright position after eating to minimize respiratory discomfort and reduce the risk of aspiration.
Correct Answer is C
Explanation
A. Inspiratory stridor
Inspiratory stridor is a high-pitched, musical sound heard during inspiration and is typically caused by turbulent airflow due to partial obstruction of the upper airway. It is commonly associated with conditions such as croup, epiglottitis, or anaphylaxis. While respiratory distress may occur in a pneumothorax, inspiratory stridor specifically suggests an upper airway obstruction rather than a pneumothorax.
B. Expiratory wheeze
Expiratory wheeze is a high-pitched, musical sound heard during expiration and is typically associated with conditions such as asthma, chronic obstructive pulmonary disease (COPD), or bronchiolitis. Wheezing occurs due to narrowing of the airways, leading to turbulent airflow during expiration. While a pneumothorax can cause respiratory distress, it is not typically associated with wheezing.
C. Absence of breath sounds
The absence of breath sounds over a particular area of the chest can indicate a pneumothorax. In a pneumothorax, air accumulates in the pleural space, causing partial or complete collapse of the lung and preventing it from making contact with the chest wall. This absence of breath sounds over the affected area is a classic finding in a pneumothorax and is crucial for its detection.
D. Coarse crackles
Coarse crackles are discontinuous, bubbling or popping sounds heard during inspiration and may be indicative of conditions such as pneumonia, pulmonary edema, or bronchiectasis. These crackles are typically heard when there is fluid or mucus in the airways. While a pneumothorax can cause respiratory distress, it does not typically produce crackles on auscultation.
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