Causes of Acute-onset Stridor

Approximately 80% of children presenting with an acute onset of stridor and a cough have croup [3].

Croup is a clinical syndrome of a hoarse voice, harsh barking cough (often described as seal-like) and acute inspiratory stridor.

Croup occurs in 2% of children aged between 6 and 36 months, with a peak incidence at 12 to 24 months. There is a male to female ratio of 3:2. It is more common in the spring and autumn months but can occur at any time of year.

Typically, there is a preceding coryzal illness with croup developing over several days. The symptoms are classically worse at night and typically last between 3 and 5 days but can last up to a week [4].

Learning bite

Croup is the most common cause of acute stridor.