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Question

Difficulty: MediumAging Process

A registered nurse is evaluating a nursing student's knowledge regarding the physiological adaptations of the respiratory system in older adults. The nurse asks the student to describe expected findings for an 83-year-old client who has no acute or chronic illness. Which statement by the student indicates an accurate understanding of normal senescence?

  1. A
    Tachypnea exceeding 24 breaths per minute at rest is a standard physiological adaptation to maintain adequate tissue oxygenation.
  2. B
    The alveolar surface area steadily expands as the client ages to ensure adequate gas exchange despite weakened respiratory muscles.
  3. The client has a diminished cough reflex and decreased ciliary function, which increases their vulnerability to respiratory infections.Answer
  4. D
    The development of a prominently increased anteroposterior chest diameter, known as a barrel chest, is an expected finding.

Answer

The correct statement is that older adults experience a diminished cough reflex and decreased ciliary function, which increases their risk for respiratory infections.
As part of the normal aging process, the respiratory system undergoes progressive structural and functional declines. These expected physiological changes include a decreased number of functional cilia in the respiratory tract, a diminished and less effective cough reflex, and reduced respiratory muscle strength. Because these changes impair the airway's innate clearance mechanisms, older adults have a significantly higher susceptibility to respiratory infections, such as pneumonia.

Step-by-Step Solution

1
Analyze the question requirements
The question asks for the identification of expected, normal physiological changes in the respiratory system during the aging process (senescence).
Focusing on 'normal senescence' is crucial to avoid selecting pathological disease indicators.
2
Evaluate the option regarding tachypnea
Identify that a resting respiratory rate over 24 breaths per minute is abnormal.
Tachypnea at rest suggests an acute problem such as hypoxia, heart failure, or infection, rather than normal aging.
3
Evaluate the option regarding alveolar surface area
Identify that alveolar surface area decreases, not increases, with age.
Normal aging causes a loss of alveolar septa, leading to fewer but larger alveoli, which decreases the overall surface area for gas exchange.
4
Evaluate the option regarding chest diameter
Identify that a prominent barrel chest is a sign of pathology.
While a slight kyphosis can occur, a true barrel chest results from chronic hyperinflation associated with COPD.
5
Confirm the correct age-related respiratory change
Select the option stating that cough reflex and ciliary function diminish.
These are documented, normal physiological declines that compromise airway clearance in older adults.

Key Concept

Expected physiological respiratory changes in the aging process
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Topics

Aging Process

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