The destruction of alveolar walls is called?

RRB Staff Nurse Delhi-2015

Medical & Surgical Nursing

Easy

Appeared in: RRB Staff Nurse Delhi-2015

Explanation

Emphysema is a lung condition pathologically defined by the permanent destruction of the walls of the air sacs (alveoli).
This destruction leads to the formation of large, irregular airspaces instead of many small ones, which significantly reduces the surface area available for gas exchange.
The loss of alveolar walls also diminishes the lung's elastic recoil, a key factor in passive exhalation, leading to air trapping and difficulty breathing out.

Option A: Empyema is the accumulation of pus in the pleural space, the area outside the lung, not the destruction of the lung's internal alveolar structure.
Option B: Bronchitis is the inflammation of the bronchial tubes (airways), characterized by mucus production and cough. It does not primarily involve the destruction of alveolar walls.
Option D: A lung abscess is a localized, pus-filled cavity resulting from the necrosis of lung tissue. While it involves destruction, it is a focal infection, not the diffuse, widespread alveolar wall destruction that defines emphysema.

Visual 1: Diagram: A visual comparison between healthy alveoli (small, numerous, with intact walls) and emphysematous alveoli (large, irregular air sacs with destroyed walls).
Visual 2: Illustration: A cross-section of the chest showing the location of Empyema (in the pleural space), a Lung Abscess (a cavity within the lung), Bronchitis (inflammation in the airways), and Emphysema (diffuse alveolar damage).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pathophysiology of Obstructive and Infectious Lung Diseases as background academic context rather than a clinical decision trigger.
Understanding the specific pathology is crucial for nurses to anticipate patient needs. For emphysema, this includes managing chronic dyspnea, providing oxygen therapy, and teaching energy conservation techniques like pursed-lip breathing.
This distinction guides patient education. A patient with bronchitis is taught about mucus clearance and avoiding irritants, while an emphysema patient learns about managing irreversible airflow limitations.
What if? If a patient presented with a high fever, productive cough with foul-smelling sputum, and a chest X-ray showing a fluid-filled cavity, the most likely diagnosis would be a Lung Abscess, not emphysema.

How to Approach the Question

This is a definition-based recall question. The goal is to match a specific pathological description to the correct medical term.
Identify the key phrase in the question stem: 'destruction of alveolar walls'. This is the defining characteristic you need to match.
Systematically evaluate each option. Ask yourself, 'Does this term mean destruction of alveolar walls?'
Recall or deduce the definitions: Empyema (pus in pleural space), Bronchitis (airway inflammation), Emphysema (alveolar wall destruction), Lung abscess (localized pus cavity).
Select Emphysema as it is the only term that directly matches the pathological process described in the question.

Concept Tested & Keywords

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