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
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","D","E","F"]
Explanation
Choice A Reason:
Client responds to name is incorrect. Responding to one's name is a positive sign indicating consciousness and orientation. It suggests that the client's level of consciousness is relatively intact.
Choice B Reason:
Eyes open to painful stimuli is correct. Opening the eyes in response to painful stimuli is a concerning sign, indicating a decrease in consciousness and potentially worsening neurological status. It suggests that the client's level of arousal is diminishing and may indicate a decline in condition.
Choice C Reason:
Client states day of the week is correct. Oriented behavior, such as knowing the day of the week, is a positive sign indicating intact cognition and orientation. It suggests that the client's mental status is relatively preserved.
Choice D Reason:
Client is confused is correct. Confusion is a concerning sign, indicating altered mental status and potentially worsening neurological function. It suggests that the client's cognition is impaired, which may be indicative of a decline in condition.
Choice E Reason:
Client mumbles inappropriate words is correct. Mumbling inappropriate words suggests disorientation and altered mental status, which are concerning signs indicating a decline in neurological function.
Choice F Reason:
Eyes do not open to name is incorrect. Failure to open the eyes in response to verbal stimuli, such as one's name, is a concerning sign indicating a decrease in consciousness and potentially worsening neurological status. It suggests that the client's level of arousal is diminished and may indicate a decline in condition.
Correct Answer is D
Explanation
Choice A Reason:
Dyspnea is not commonly seen in other chronic conditions of the aging older adult: This statement is incorrect. Dyspnea, or difficulty breathing, can occur in various chronic conditions commonly seen in aging adults, such as chronic obstructive pulmonary disease (COPD), heart failure, and pulmonary fibrosis, among others. Dyspnea can be a symptom of respiratory or cardiovascular issues and is not exclusive to asthma.
Choice B Reason:
Aging is associated with decreased sensitivity to medications: This statement is generally incorrect. Aging can affect drug metabolism and clearance, leading to changes in medication sensitivity. Older adults may have altered pharmacokinetics and pharmacodynamics, which can increase their sensitivity to certain medications, particularly those with sedative or CNS depressant effects. This increased sensitivity can potentially increase the risk of adverse drug reactions.
Choice C Reason:
Adverse reactions to medications in the aging older adult are lower: This statement is incorrect. While some physiological changes associated with aging may decrease the risk of adverse drug reactions, such as decreased renal function and altered drug metabolism, older adults are still at risk for adverse drug reactions due to factors such as polypharmacy, drug interactions, and increased sensitivity to medications.
Choice D Reason:
Physiological changes in the respiratory system can mimic the presence of airway obstruction: This statement is true. Physiological changes in the aging respiratory system, such as decreased lung elasticity, increased chest wall stiffness, and reduced respiratory muscle strength, can mimic the symptoms of airway obstruction seen in conditions like asthma or COPD. These changes can lead to decreased lung function, reduced exercise tolerance, and increased susceptibility to respiratory infections.
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