A nurse is caring for a client who has respiratory failure due to ventilation-perfusion (V/Q) mismatch. The nurse should recognize that the client most likely has which of the following conditions?
Flail chest
Emphysema
Congestive heart failure
Guillain-Barré syndrome
None
None
The Correct Answer is B
Choice A Reason:
Flail chest is incorrect. Flail chest is a condition characterized by multiple rib fractures, causing instability in the chest wall. While it can lead to respiratory distress, it doesn't directly cause ventilation-perfusion (V/Q) mismatch. Instead, it impairs the mechanics of breathing by compromising chest wall integrity.
Choice B Reason:
Emphysema is a chronic obstructive pulmonary disease (COPD) where the alveolar walls are destroyed, leading to a loss of surface area for gas exchange. This results in areas of the lungs that are well-perfused but poorly ventilated, causing a V/Q mismatch. The damage to alveoli leads to impaired ventilation, while blood flow may still be adequate, leading to hypoxemia (low oxygen levels in the blood).
Choice C Reason:
CHF primarily affects the heart’s ability to pump blood effectively, leading to pulmonary congestion and impaired gas exchange. However, it typically causes diffusion defects rather than a direct ventilation-perfusion mismatch. V/Q mismatch may occur secondary to pulmonary edema, but it’s not the primary mechanism of respiratory failure in CHF.
Choice D Reason:
Guillain-Barré syndrome is incorrect. Guillain-Barré syndrome (GBS) is a neurological disorder that affects the peripheral nervous system, leading to muscle weakness and paralysis. While respiratory muscle weakness can occur in GBS, it doesn't directly cause ventilation-perfusion (V/Q) mismatch. GBS primarily affects nerve function rather than lung function.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A Reason:
"When did you have your last physical?": This question is relevant to assess the client's overall health status and identify any potential comorbidities or health conditions that may be associated with Parkinson's disease. However, it is not as crucial as asking about family history, which directly addresses the client's potential genetic predisposition to Parkinson's disease.
Choice B Reason:
"Do you have any family members with Parkinson's disease?" Parkinson's disease can have both genetic and environmental factors contributing to its development. While the exact cause of Parkinson's disease is not fully understood, having a family history of the condition is a significant risk factor. Individuals with first-degree relatives (parents, siblings, or children) who have Parkinson's disease have an increased risk of developing the condition themselves.
Choice C Reason:
"What kind of work do you do?": This question aims to gather information about the client's occupational history and potential exposure to environmental toxins or factors that may be associated with Parkinson's disease. Certain occupations or exposures to pesticides, herbicides, heavy metals, or other toxins have been linked to an increased risk of Parkinson's disease. While occupational history is important, it is not as directly relevant to assessing the client's risk factors as asking about family history.
Choice D Reason:
"How much coffee do you drink every day?": Research has suggested that caffeine consumption may be associated with a reduced risk of Parkinson's disease or may potentially delay its onset. However, the evidence is not definitive, and the relationship between caffeine intake and Parkinson's disease is still not fully understood. While caffeine consumption may be a relevant factor to explore, especially if the client has a high intake of coffee, it is not as critical as inquiring about family history, which directly addresses genetic predisposition to Parkinson's disease.
Correct Answer is C
Explanation
Choice A Reason:
Decreased mucus production contributes to airway constriction: This statement is incorrect. Bronchospasm does not decrease mucus production; instead, it primarily affects the smooth muscles surrounding the bronchioles, leading to their constriction and narrowing of the airways. Increased mucus production, often accompanied by inflammation, can contribute to airway obstruction in conditions like asthma.
Choice B Reason:
Inflammation is reduced due to airway diameter: This statement is incorrect. Bronchospasm typically occurs in the setting of inflammation in conditions such as asthma. Constriction of the airways during bronchospasm exacerbates the inflammation and can further narrow the airways, leading to symptoms such as wheezing and dyspnea.
Choice C Reason:
Bronchospasm occurs when there is inflammation, edema, and excess mucus: This statement is partially correct. Bronchospasm often occurs in the presence of inflammation, edema, and excess mucus production, as seen in conditions like asthma. These factors contribute to airway hyperresponsiveness, leading to bronchospasm and airway narrowing.
Choice D Reason:
Airway obstruction occurs due to thinning mucus: This statement is incorrect. Airway obstruction in conditions like asthma is primarily due to bronchospasm, inflammation, and excessive mucus production, rather than thinning mucus. Thinning of mucus would not typically contribute to airway obstruction.
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