What treatment is appropriate for a responsive 4-year-old child with mild airway obstruction?

In the case of a responsive 4-year-old child with mild airway obstruction, the appropriate treatment focuses on ensuring that the child can breathe adequately while minimizing unnecessary interventions. Since the child is responsive, it indicates that they are still able to communicate and may be handling the situation without immediate distress.

Administering supplemental oxygen can help to ensure that the child maintains adequate oxygenation without further aggravating the airway obstruction. Transport is also crucial, as it ensures that the child can receive further medical evaluation and treatment if necessary. Mild airway obstruction usually allows for spontaneous breathing, so aggressive maneuvers like back slaps or assisted ventilations may not be warranted at this stage, as they might disturb the child's breathing pattern further or cause undue stress.

Therefore, the combination of providing supplemental oxygen and arranging for transport is the most appropriate action to support the child's respiratory needs while allowing for continued monitoring and intervention if the situation worsens.