What is the next step when a 6-year-old child exhibits moderate inspiratory stridor and has SpO2 of 81%?

In the scenario presented, the child is exhibiting moderate inspiratory stridor and has an oxygen saturation (SpO2) of 81%, which indicates significant respiratory distress and potential airway obstruction.

The primary immediate concern is to ensure adequate oxygen delivery to the child. Therefore, replacing the nasal cannula with a non-rebreather mask is a crucial step. A non-rebreather mask can deliver high concentrations of oxygen, which is essential for improving the child's oxygen saturation rapidly and addressing hypoxia. This intervention is vital, especially in a pediatric patient experiencing respiratory distress due to potential airway compromise.

Providing supplemental oxygen through a non-rebreather mask can help alleviate hypoxia and improve the child's condition while further assessments and treatments are initiated. This step does not intervene directly with the airway obstruction itself but provides critical oxygenation support as the situation is managed.

Administering nebulized bronchodilators, using CPAP, or performing an emergency tracheostomy would typically be considered in more severe or specific circumstances related to the underlying cause of the stridor or when other interventions have failed. However, in this case, the immediate priority should be the provision of adequate oxygenation to manage the child's hypoxia effectively.