Which option is a direct factor for airway obstruction due to impaired coughing?

• A. Dehydration
• B. Unable to Cough
• C. Risk for Aspiration
• D. Patients with Decreased LOC

Answer: (B)

An effective cough is the body's primary way to clear the airway of secretions and debris. When coughing is impaired, this clearance fails, so mucus, particulate matter, or mucus plugs can accumulate and block the airways. That direct loss of the clearing mechanism is what leads to airway obstruction. Dehydration thickens secretions and makes clearance harder, but it doesn’t by itself cause obstruction; it simply makes the problem worse if coughing can’t occur. Others factors like aspiration risk or decreased level of consciousness raise susceptibility to airway problems, but the immediate obstruction from impaired coughing comes from the inability to generate an effective cough to clear the airway.