What is the most common cause of airway obstruction in infants?

The most common cause of airway obstruction in infants is indeed the tongue. In infants, the anatomy of the airway is such that the tongue is naturally larger in proportion to the mouth and throat, making it a frequent cause of obstruction, especially when the infant is in a supine position (lying on their back).

The tongue can fall back into the throat and block the airway, making it difficult for the infant to breathe. This is particularly concerning during scenarios such as unconsciousness or when an infant is sleeping, as the muscle tone decreases and the tongue is more likely to obstruct the airway.

In contrast, foreign bodies, while they can cause airway obstruction, are less common as a cause compared to the anatomical predispositions seen in infants. Also, bronchospasm and paroxysmal cough are related to underlying respiratory conditions rather than being specific causes of airway obstruction in infants. Understanding the anatomical and physiological characteristics of infants is crucial for recognizing and managing potential airway complications effectively.