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A comprehensive set of questions and answers related to diagnostic reasoning for nurse practitioners, covering topics such as pulmonary function tests, polysomnography, bronchoscopy, thoracentesis, influenza diagnosis, and pulmonary embolus risk factors. It offers insights into the interpretation of various diagnostic procedures and their clinical significance.
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Q1: What factors can cause variability in pulmonary function tests/s spirometry?
Correct Answer: Variability in pulmonary function tests can be influenced by several factors, including:
Q2: What is the purpose of pulmonary function tests/spirometry?
Correct Answer: Pulmonary function tests are used to evaluate:
Q3: What specific tests are included in pulmonary function tests?
Correct Answer: Tests typically included are:
Correct Answer: In obstructive pulmonary disease:
Q8: What findings are associated with FEV1 in restrictive lung disease?
Correct Answer: In restrictive lung disease:
Q9: What is a normal FEV1/FVC ratio in restrictive lung disease?
Correct Answer: The normal FEV1/FVC ratio in restrictive lung diseases is approximately 80%.
Q10: What is a normal FEV1/FVC ratio in obstructive lung disease?
Correct Answer: The FEV1/FVC ratio in obstructive lung disease is less than 80%, indicating significant obstruction.
Q11: Under what condition will the FEV1 value reliably improve?
Correct Answer: FEV1 improvement is typically noted after bronchodilator therapy in cases where an underlying spastic component contributes to obstructive pulmonary disease.
Q12: What constitutes normal results on spirometry?
Correct Answer: Normal spirometry results are generally defined as values greater than 80% of the expected normative values for a person’s demographic parameters.
Q13: When is airflow rate considered diminished?
Correct Answer: An airflow rate is considered diminished when it is less than 60% of the expected normal value.
Q14: What can help increase airflow rate and by how much?
Correct Answer: A bronchodilator can help increase airflow rate by approximately 20% in responsive patients.
Correct Answer: Polysomnography is indicated in patients who:
Q19: What is polysomnography most commonly used to diagnose?
Correct Answer: This test is most commonly used to diagnose sleep apnea, a condition characterized by interrupted breathing during sleep.
Q20: What is actigraphy?
Correct Answer: Actigraphy is a method of monitoring sleep patterns by using a wrist-worn device that records movements (often for several nights) to assess sleep duration and quality.
Q21: What is bronchoscopy used for?
Correct Answer: Bronchoscopy is a procedure used for both diagnostic and therapeutic purposes, allowing for visualization of the tracheobronchial tree.
Q22: What can bronchoscopy be employed for?
Correct Answer: Uses of bronchoscopy include:
Q23: What are some indications for bronchoscopy?
Correct Answer: Indications for bronchoscopy include:
Correct Answer: Transudates typically appear clear or serous with protein levels less than 3 g/dL.
Q28: What conditions are exudates most often found in?
Correct Answer: Exudates are commonly found in:
Q29: What is the appearance of exudates?
Correct Answer: Exudates usually appear cloudy or turbid, have increased white blood cell counts, protein levels greater than 3 g/dL, low glucose levels, and a pleural fluid to serum protein ratio greater than 0.6.
Q30: What must be obtained before performing a thoracentesis?
Correct Answer: A chest X-ray should be obtained prior to thoracentesis to confirm that pleural fluid is present and assess its accessibility.
Q31: Why is a chest X-ray obtained before thoracentesis?
Correct Answer: A chest X-ray is crucial to ensure that the pleural fluid is mobile and can be safely accessed with a needle.
Q32: How is influenza diagnosed?
Correct Answer: Diagnosis can be made using:
Q33: What is the advantage of RNA/DNA PCR for diagnosing influenza?
Correct Answer: RNA/DNA PCR is advantageous because of its high specificity and sensitivity for detecting viral RNA, offering precise results.
Q34: What panel does the RNA/DNA PCR test fall under?
Correct Answer: The PCR test often falls under a broader respiratory panel that tests for multiple respiratory pathogens.
Q38: What are the strong risk factors for pulmonary embolus?
Correct Answer: Strong risk factors include:
Q39: What are the signs and symptoms of pulmonary embolism?
Correct Answer: Common signs and symptoms include:
Q40: How does pleurodynia present?
Correct Answer: Pleurodynia is characterized by sharp pain that worsens with deep inhalation, often indicating irritation of the pleura or lung tissue.
Q41: What are the expected diagnostic findings in pulmonary embolism?
Correct Answer: Diagnostics may show:
Correct Answer: The V/P scan often reveals a mismatch between ventilation and perfusion, indicating areas of the lung that are ventilated but not adequately perfused.
Q46: What is the role of a CT scan in pulmonary embolism diagnosis?
Correct Answer: A CT scan is crucial for diagnosing and evaluating pathologic conditions, including identifying pulmonary artery emboli.
Q47: What conditions can a CT scan help diagnose?
Correct Answer: CT scans are useful for diagnosing conditions such as tumors, pulmonary emboli, and other abnormalities in lung structure or vasculature.
Q47: What category does pregnancy/antepartum fall under regarding pulmonary embolus risk factors?
Correct Answer: Weak risk factor. Explanation: Pregnancy increases venous thromboembolism risk due to physiological changes such as increased coagulability and venous stasis. However,
it does not elevate risk as significantly as stronger risk factors, hence categorized as weak.
Q48: What category do varicose veins fall under regarding pulmonary embolus risk factors?
Correct Answer: Weak risk factor. Explanation: While varicose veins may indicate a predisposition to venous insufficiency, which can lead to thrombus formation, their association with pulmonary embolism risk is limited, categorizing them as a weak risk factor.
Q49: What are the odds assigned to weak risk factors for pulmonary embolus?
Correct Answer: Less than 2. Explanation: Weak risk factors for pulmonary embolism often have an odds ratio of less than 2, indicating minimal contribution to the overall risk of developing this condition.
Q50: What are the odds assigned to medium risk factors for pulmonary embolus?
Correct Answer: Less than 2.
Explanation: Arthroscopic knee surgery can result in postoperative immobility and localized inflammation, which may lead to thrombus formation, hence categorized as a medium risk factor for pulmonary embolism.
Q53: What category do central venous lines fall under regarding pulmonary embolus risk factors?
Correct Answer: Medium risk factor. Explanation: Central venous catheters often lead to localized vascular injury and can induce thrombosis, raising the risk for pulmonary embolism, thus categorized as medium risk.
Q54: What category does chemotherapy fall under regarding pulmonary embolus risk factors?
Correct Answer: Medium risk factor. Explanation: Chemotherapy agents can disrupt normal hemostatic mechanisms and lead to a hypercoagulable state, contributing to the risk of venous thromboembolism.
Q55: What category does congestive heart failure (CHF) or respiratory failure fall under regarding pulmonary embolus risk factors?
Correct Answer: Medium risk factor. Explanation: CHF or respiratory failure can impair venous return and lead to increased venous pressure, promoting thrombosis formation, thus categorized as a medium risk factor.
Q56: What category does hormone replacement therapy fall under regarding pulmonary embolus risk factors?
Correct Answer: Medium risk factor. Explanation: Hormone replacement therapy has been linked to increased coagulability due to hormonal effects on clotting factors, categorizing it as a medium risk factor for pulmonary embolism.
Q57: What category does oral contraceptive therapy fall under regarding pulmonary embolus risk factors?
Correct Answer: Medium risk factor. Explanation: Oral contraceptives have long been associated with an increased risk of thrombosis due to their effects on coagulation pathways, placing them in the medium risk factor category.
