A nurse is caring for a client with acute pulmonary edema. Which mechanism is responsible for the accumulation of fluid in the alveoli and interstitial spaces in this condition?
Increased hydrostatic pressure in pulmonary capillaries
Decreased capillary permeability in the lungs
Enhanced lymphatic drainage from the lungs
Elevated colloid osmotic pressure in pulmonary vessels
The Correct Answer is A
A) Correct. Increased hydrostatic pressure in pulmonary capillaries, often due to left ventricular failure, leads to the filtration of fluid from the capillaries into the alveoli and interstitial spaces, causing pulmonary edema.
B) Incorrect. Decreased capillary permeability is not typically a primary factor in the development of pulmonary edema.
C) Incorrect. Enhanced lymphatic drainage from the lungs is not a primary mechanism responsible for the accumulation of fluid in pulmonary edema.
D) Incorrect. Elevated colloid osmotic pressure in pulmonary vessels would oppose fluid accumulation in the alveoli and is not a primary cause of pulmonary edema.
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Related Questions
Correct Answer is C
Explanation
A) Incorrect. Atrial contraction contributes to ventricular filling but is not typically the primary site of impairment in heart failure leading to pulmonary edema.
B) Incorrect. Ventricular relaxation (diastole) is necessary for ventricular filling, but the impaired contraction during systole is a more common issue in heart failure.
C) Correct. Impaired ventricular contraction (systole) in heart failure results in reduced forward flow of blood and leads to fluid backup in the lungs, contributing to pulmonary edema.
D) Incorrect. Electrical conduction in the heart may affect heart rhythm but is not directly related to the development of pulmonary edema.
Correct Answer is B
Explanation
A) Incorrect. Caffeine, when consumed in moderation, is not a known risk factor for pulmonary edema.
B) Correct. Excessive alcohol consumption can lead to heart-related issues, including alcoholic cardiomyopathy, which can increase the risk of pulmonary edema.
C) Incorrect. While nicotine is harmful to the cardiovascular system, it is not a direct cause of pulmonary edema.
D) Incorrect. While marijuana use can have various health effects, it is not a known direct risk factor for pulmonary edema.
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