What should be checked first if a child with a known respiratory condition presents with sudden respiratory distress?

In a situation where a child with a known respiratory condition exhibits sudden respiratory distress, the primary focus must be on airway patency. The airway is the crucial first component in the respiratory system, and ensuring it is clear or open can determine whether the child is able to breathe adequately. If there is any obstruction or compromise to the airway, it can lead to critical consequences very quickly.

By checking airway patency first, healthcare providers can ascertain if the child is experiencing any blockage or if the breathing passages are clear. This step is essential because, without a clear airway, efforts to administer medications, reposition, or monitor oxygen saturation will be futile if the child cannot improve their ventilation.

While monitoring oxygen saturation and nasal airflow are important subsequent steps, they depend on a clear airway to be effective. Incorrect airflow or obstruction could also affect the readings of these assessments. Therefore, prioritizing airway patency is the most appropriate response in this scenario.