The nurse recognizes which of the following tests will confirm the diagnosis of tuberculosis for a client?
Sputum culture of Mycobacterium tuberculosis
Tuberculin (PPD) skin test
Acid-fast bacillus smear
Chest X-ray
The Correct Answer is A
Choice A reason:
A sputum culture of Mycobacterium tuberculosis is the definitive test for diagnosing tuberculosis (TB). This test involves collecting a sputum sample and culturing it to detect the presence of Mycobacterium tuberculosis, the bacteria that cause TB. It is considered the gold standard for confirming active TB infection.
Choice B reason:
The Tuberculin (PPD) skin test, also known as the Mantoux test, is used to screen for TB infection. It can indicate whether a person has been exposed to TB bacteria, but it cannot confirm active TB disease. A positive result requires further testing, such as a sputum culture, to confirm the diagnosis.
Choice C reason:
An acid-fast bacillus (AFB) smear is a quick test that can detect the presence of mycobacteria in a sputum sample. While it can provide a preliminary indication of TB, it is not definitive. A positive AFB smear must be followed by a sputum culture to confirm the diagnosis.
Choice D reason:
A chest X-ray can show abnormalities in the lungs that are suggestive of TB, such as cavities or infiltrates. However, it cannot confirm the diagnosis on its own. Chest X-rays are used in conjunction with other tests, such as sputum culture and AFB smear, to diagnose TB.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: Albuterol is a bronchodilator that helps to open up the airways, making it easier to breathe. It is commonly used in the treatment of acute bronchitis, especially if the patient is experiencing wheezing or shortness of breath. Albuterol works by relaxing the muscles around the airways, which helps to relieve symptoms of bronchospasm.
Choice B reason: Guaifenesin is an expectorant that helps to thin and loosen mucus in the airways, making it easier to cough up and clear out. This can be particularly helpful for a patient with a productive cough and green sputum, as it aids in clearing the respiratory passages. Guaifenesin is often used in the management of acute bronchitis to help alleviate symptoms.
Choice C reason: Methylprednisolone is a corticosteroid that helps to reduce inflammation in the airways. It can be beneficial in severe cases of acute bronchitis where there is significant inflammation and swelling of the bronchial tubes. Corticosteroids like methylprednisolone are used to decrease the inflammatory response and improve breathing.
Choice D reason: Dextromethorphan is a cough suppressant that works by affecting the signals in the brain that trigger the cough reflex. However, in the case of acute bronchitis with a productive cough, suppressing the cough can be counterproductive. The goal is to clear the mucus from the airways, and suppressing the cough can lead to mucus retention and potentially worsen the condition. Therefore, the use of a cough suppressant like dextromethorphan is not recommended in this scenario.
Correct Answer is D
Explanation
Pursed-lip breathing is a technique used to help manage shortness of breath and improve ventilation. It involves breathing in through the nose and exhaling slowly through pursed lips, as if blowing out a candle. This method helps to keep the airways open longer, allowing more air to escape and reducing the work of breathing.
Choice A reason:
Exhale quickly and forcefully through the mouth is not the correct intervention for pursed-lip breathing. Exhaling quickly and forcefully can cause the airways to collapse, making it harder to breathe out all the air. This can lead to air trapping and increased shortness of breath, which is counterproductive for clients with respiratory issues.
Choice B reason:
Inhale sharply with a “huff” sound is also not correct for pursed-lip breathing. Huff coughing is a technique used to clear mucus from the airways, not to manage breathing patterns. Inhaling sharply can cause irritation and may not provide the controlled breathing needed for effective gas exchange.
Choice C reason:
Inhale deeply through pursed lips is incorrect. The correct technique for pursed-lip breathing involves inhaling through the nose, not through pursed lips. Inhaling through the nose helps to filter and humidify the air, making it easier on the lungs and airways.
Choice D reason:
Exhale slowly through pursed lips is the correct intervention. This technique helps to prolong exhalation, which reduces the respiratory rate and improves ventilation. By keeping the airways open longer, it helps to release trapped air and improve oxygenation. This method is particularly beneficial for clients with chronic obstructive pulmonary disease (COPD) and asthma, as it helps to reduce the work of breathing and improve overall respiratory function.
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