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 B
Explanation
Choice A rationale
Decreasing speaking speed may help with clarity, but it does not address the issue of hearing loss.
Choice B rationale
Over-enunciating word syllables can help the client understand speech better, especially if they have hearing difficulties. This technique makes it easier for the client to read lips and understand spoken words.
Choice C rationale
Raising voice volume to a shout can be uncomfortable and may not improve understanding. It can also be perceived as rude or aggressive.
Choice D rationale
Exaggerating nonverbal expressions may help with communication, but it is not as effective as over-enunciating word syllables for clients with hearing difficulties.
Correct Answer is C
Explanation
Choice A rationale
Advising the client that it is too late to receive an influenza vaccination once symptoms occur is correct, but it does not address the client’s question about oseltamivir.
Choice B rationale
Explaining that antibiotics are not useful in treating viral infections is correct, but it does not address the client’s question about oseltamivir.
Choice C rationale
Referring the client to the healthcare provider to obtain a medication prescription is the most appropriate response. Oseltamivir is an antiviral medication that can be effective if started within 48 hours of symptom onset.
Choice D rationale
Instructing the client that over-the-counter medications are sufficient to manage influenza symptoms is not appropriate, as oseltamivir can help reduce the severity and duration of the illness if taken early.