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?
Hemoccult test on sputum collected from hemoptysis.
Sputum culture positive for Mycobacterium tuberculosis.
Positive purified protein derivative (PPD) skin test.
Chest X-ray or computed tomography (CT).
The Correct Answer is B
Choice A rationale:
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 B rationale:
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.
Choice C rationale:
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:
Chest X-ray or computed tomography (CT) can show abnormalities in the lungs that are suggestive of 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. A sputum culture is still needed to confirm the diagnosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale:
Incorrect. Open-angle glaucoma is not characterized by an abnormally small angle.
The angle in open-angle glaucoma is open, but the drainage system is not working properly. Therefore, restoring a smaller angle would not be an effective treatment goal.
Choice B rationale:
Incorrect. Eye drops used to treat open-angle glaucoma are not typically used for pain control.
While some individuals may experience mild discomfort associated with elevated eye pressure, pain is not a common symptom of open-angle glaucoma.
Additionally, eye drops used to treat glaucoma do not have anti-inflammatory properties to address swelling.
Choice C rationale:
Incorrect. While reducing excess eye pressure is an important initial goal of treatment, long-term management of open-angle glaucoma requires ongoing maintenance of normal eye pressure.
Simply reducing pressure temporarily is not sufficient to prevent vision loss.
Choice D rationale:
Correct. The primary goal of treatment for open-angle glaucoma is to maintain normal eye pressure over the long term. This is because elevated eye pressure can damage the optic nerve, leading to vision loss.
Eye drops are often used to lower eye pressure, and they typically need to be used for life to prevent vision loss.
Correct Answer is C
Explanation
Choice A rationale:
It is true that antibiotics are not effective against viruses like influenza. They only work against bacteria.
However, while providing this information to the client is accurate, it does not directly address the client's inquiry about taking oseltamivir, which is an antiviral medication.
It's essential for the nurse to guide the client toward the appropriate healthcare provider who can assess the client's condition and make an informed decision about whether oseltamivir is a suitable treatment option.
Choice B rationale:
While it is true that influenza vaccination is most effective when given before exposure to the virus, it is still a relevant consideration even after symptoms have begun.
Studies have shown that antiviral medications like oseltamivir can potentially reduce the severity and duration of influenza symptoms, even when started within 48 hours of symptom onset.
Therefore, simply advising the client that it's too late for vaccination without exploring other potential treatment options would be incomplete and potentially disadvantageous to the client's care.
Choice C rationale:
This is the most appropriate response because it ensures that the client receives a comprehensive assessment and individualized treatment plan from a qualified healthcare provider.
The provider can evaluate the client's symptoms, medical history, and potential risk factors to determine if oseltamivir is a suitable medication.
Additionally, the provider can discuss other potential treatment options, such as over-the-counter medications for symptom relief, and provide guidance on self-care measures to promote recovery.
Choice D rationale:
While over-the-counter medications can help manage some symptoms of influenza, such as fever, aches, and cough, they do not directly target the virus itself.
Antiviral medications like oseltamivir can potentially shorten the duration of the illness and reduce the risk of complications, especially in individuals at higher risk.
Therefore, relying solely on over-the-counter medications without considering antiviral therapy could potentially delay recovery and increase the likelihood of adverse outcomes.
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