A nurse is explaining the pathophysiology of pulmonary edema to a group of nursing students. Which physiological mechanism underlies the development of pulmonary edema?
Increased lung compliance
Impaired alveolar fluid clearance
Constricted pulmonary blood vessels
Enhanced left ventricular contractility
The Correct Answer is B
A) Incorrect. Increased lung compliance would not contribute to pulmonary edema; in fact, it might reduce the risk of fluid accumulation in the lungs.
B) Correct. Impaired alveolar fluid clearance, often due to altered pulmonary capillary permeability, is a key factor in the pathophysiology of pulmonary edema.
C) Incorrect. Constricted pulmonary blood vessels (vasoconstriction) would reduce blood flow to the lungs and are not a primary factor in pulmonary edema.
D) Incorrect. Enhanced left ventricular contractility, while beneficial for cardiac function, is not directly related to the development of pulmonary edema.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A) Incorrect. Urinary output is important but does not directly assess the client's oxygenation status.
B) Correct. Monitoring the respiratory rate and effort is essential to ensure the client is adequately oxygenated and not in respiratory distress.
C) Incorrect. Skin turgor is unrelated to oxygenation and pulmonary edema.
D) Incorrect. Bowel sounds do not provide information about the client's oxygenation status.
Correct Answer is A
Explanation
A) Correct. A CT scan can help identify the presence of fluid in the alveoli and interstitial spaces of the lungs, making it a valuable tool in diagnosing pulmonary edema.
B) Incorrect. MRI is not typically used to diagnose pulmonary edema, as it may not provide as clear an image of lung tissue as a CT scan.
C) Incorrect. PET scans are more commonly used in oncology to detect metabolic activity and are not typically used for pulmonary edema diagnosis.
D) Incorrect. While ultrasound can be useful in assessing pleural effusions, it may not provide the same level of detail as a CT scan for diagnosing pulmonary edema.
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