Bronchiolitis is listed as a common cause of which type of airway obstruction?

Bronchiolitis is listed as a common cause of which type of airway obstruction?

• A. Lower airway obstruction
• B. Upper airway obstruction
• C. Central airway obstruction
• D. Extrathoracic airway obstruction

Answer: (A)

Bronchiolitis inflames and narrows the small airways in the lungs—the bronchioles—which places the problem in the lower part of the airway system. The illness causes mucosal swelling, increased mucus, and sometimes debris within these tiny passages, leading to obstruction during breathing. Because the blockage is in the distal, small airways rather than the nose, throat, larynx, or trachea, this pattern fits lower airway obstruction. In contrast, upper airway obstruction involves the nasal passages to the larynx, central airway obstruction affects the trachea or main bronchi, and extrathoracic issues relate to structures outside the thoracic cavity; bronchiolitis specifically targets the lower airway passages, producing wheeze and labored breathing characteristic of lower airway disease.

Bronchiolitis inflames and narrows the small airways in the lungs—the bronchioles—which places the problem in the lower part of the airway system. The illness causes mucosal swelling, increased mucus, and sometimes debris within these tiny passages, leading to obstruction during breathing. Because the blockage is in the distal, small airways rather than the nose, throat, larynx, or trachea, this pattern fits lower airway obstruction. In contrast, upper airway obstruction involves the nasal passages to the larynx, central airway obstruction affects the trachea or main bronchi, and extrathoracic issues relate to structures outside the thoracic cavity; bronchiolitis specifically targets the lower airway passages, producing wheeze and labored breathing characteristic of lower airway disease.