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 B
Explanation
Choice A rationale:
While ABGs can provide valuable information about a patient's respiratory status, they are not routinely required prior to postural drainage in patients with COPD.
ABGs might be considered if the patient is experiencing acute respiratory distress or if there are concerns about their oxygenation or ventilation status.
However, in the absence of such concerns, obtaining ABGs would not be necessary and could potentially cause discomfort or anxiety for the patient.
Choice C rationale:
Performing postural drainage immediately after meals is not recommended for patients with COPD.
This is because eating can cause a feeling of fullness in the stomach, which can make it difficult for the patient to breathe deeply and effectively during the procedure.
Additionally, there is a risk of aspiration if the patient were to vomit during or after postural drainage.
It is generally recommended to perform postural drainage at least 1-2 hours after meals to reduce these risks.
Choice D rationale:
Instructing the patient to breathe shallow and fast is not appropriate for postural drainage.
The goal of postural drainage is to help the patient mobilize and expectorate secretions from the lungs.
This is best achieved by encouraging the patient to breathe deeply and slowly, which helps to open up the airways and promote mucus clearance.
Shallow, rapid breathing can actually make it more difficult to clear secretions and can lead to increased shortness of breath.
Choice B rationale:
Explaining that the patient may be placed in five positions is the most appropriate approach for postural drainage in a patient with COPD.
This is because different positions help to drain different areas of the lungs. The five positions typically used for postural drainage are:
Head down position (to drain the lower lobes)
Prone position (to drain the posterior segments of the lungs)
Right lateral position (to drain the right middle lobe and right lower lobe) Left lateral position (to drain the left lower lobe)
Sitting upright position (to drain the upper lobes)
By placing the patient in these different positions, the nurse can help to ensure that all areas of the lungs are drained effectively.
Correct Answer is ["B","E","G"]
Explanation
B. Position the patient with the head of the bed elevated. Rationale:
Promotes lung expansion: Elevating the head of the bed by at least 30 degrees utilizes gravity to assist in diaphragmatic descent and lung expansion. This allows for greater intake of air, optimizing oxygen intake and facilitating better gas exchange.
Reduces work of breathing: When upright, the abdominal muscles can more effectively aid in breathing, reducing the workload on the diaphragm and accessory muscles. This conserves energy and decreases the patient's respiratory effort.
Enhances secretion drainage: Gravity also aids in the movement of secretions from the lower lobes of the lungs towards the upper airways, where they can be more easily coughed up or suctioned. This helps to clear the airways and improve ventilation.
E. Teach the patient to cough at least once an hour. Rationale:
Clears secretions: Coughing is a natural mechanism to clear secretions from the lungs and airways. It helps to prevent mucus buildup and potential obstruction, which can lead to atelectasis (collapse of lung tissue) and further compromise ventilation.
Improves gas exchange: By removing secretions, coughing allows for better airflow and gas exchange within the lungs. This enhances oxygenation and helps to prevent respiratory complications.
G. Assist the patient in ambulating safely. Rationale:
Mobilizes secretions: Ambulation encourages movement of secretions from the lower lobes of the lungs, promoting their clearance and preventing mucus buildup.
Prevents atelectasis: Walking and movement help to expand the lungs, reducing the risk of atelectasis and improving overall ventilation.
Enhances circulation: Ambulation also improves circulation, which can help to deliver oxygen to the tissues more effectively and aid in healing.
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