The nurse is admitting a client with possible tuberculosis (TB). The client is placed in a private room with airborne precautions pending diagnostic test results. Which diagnostic test should the nurse review to confirm the diagnosis of TB?
Chest X-ray or computed tomography (CT).
Hemoccult test on sputum collected from hemoptysis.
Positive purified protein derivative (PPD) skin test.
Sputum culture positive for Mycobacterium tuberculosis.
The Correct Answer is D
Choice A rationale
A chest X-ray or computed tomography (CT) scan can show abnormalities in the lungs that are suggestive of tuberculosis (TB), but they cannot definitively diagnose TB. These imaging tests can reveal changes in the lungs, such as nodules, inflammation, or fluid buildup, which can be caused by TB or other conditions. Therefore, a chest X-ray or CT scan alone is not sufficient to diagnose TB.
Choice B rationale
A hemoccult test on sputum collected from hemoptysis is not a diagnostic test for TB. It is a test for blood in the stool, which can be a symptom of TB but is not specific to TB. Hemoptysis, or coughing up blood, can occur in various conditions, including bronchitis, pneumonia, lung cancer, and TB. The hemoccult test cannot differentiate between these causes, making it an unreliable test for diagnosing TB.
Choice C rationale
A positive purified protein derivative (PPD) skin test indicates exposure to TB but does not confirm active infection. The PPD skin test involves injecting a small amount of tuberculin, a protein derived from Mycobacterium tuberculosis, into the skin. If a person has been exposed to TB, their immune system will react to the tuberculin, causing a raised red bump to appear at the injection site. However, a positive PPD skin test does not necessarily mean that a person has active TB infection. It could also mean that they have been exposed to TB in the past but have successfully fought off the infection. Further testing, such as a sputum culture, is needed to confirm the diagnosis of TB.
Choice D rationale
A sputum culture positive for Mycobacterium tuberculosis is the definitive diagnostic test for TB. It involves collecting a sample of sputum, which is the mucus coughed up from the lungs, and culturing it in a laboratory to see if Mycobacterium tuberculosis, the bacteria that causes TB, grows. This test is highly specific for TB, meaning that a positive result is almost always indicative of TB infection. It is also sensitive, meaning that it can detect TB infection even when there are few bacteria present.
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Correct Answer is D
Explanation
Choice A rationale
Total protein levels are not directly related to the symptoms of pallor and fatigue. While important, they do not provide immediate insight into the client’s current condition.
Choice B rationale
Sodium levels are crucial for overall health but are not directly related to the symptoms of pallor and fatigue. Monitoring sodium is important for fluid balance but not for diagnosing anemia.
Choice C rationale
Glucose levels are essential for managing diabetes and other metabolic conditions but are not directly related to the symptoms of pallor and fatigue. Monitoring glucose is important for overall health but not for diagnosing anemia.
Choice D rationale
Hemoglobin levels are directly related to the symptoms of pallor and fatigue. Diclofenac, an NSAID, can cause gastrointestinal bleeding, leading to anemia. Therefore, reviewing hemoglobin levels is crucial in this scenario.
Correct Answer is A
Explanation
Choice A rationale
Reviewing with the client the need to avoid foods rich in milk and cream is crucial. Dairy products can increase gastric acid secretion, which can exacerbate duodenal ulcers.
Choice B rationale
Suggesting frequent small meals can help reduce discomfort but does not address the issue of dairy products exacerbating the ulcer.
Choice C rationale
Switching to decaffeinated coffee and tea is beneficial but not as critical as avoiding dairy products.
Choice D rationale
Reinforcing teaching by asking the client to list dairy foods does not address the need to avoid these foods.