What immediate intervention should be taken if a child's oxygen saturation is 91%?

When a child's oxygen saturation levels drop to 91%, immediate intervention is crucial because this indicates potential hypoxemia, which can lead to serious complications if not addressed promptly. Administering high-flow oxygen is the most appropriate response to enhance oxygen delivery to the child's lungs and improve oxygen saturation levels.

High-flow oxygen is effective in rapidly increasing the amount of oxygen available for the child to breathe, helping to alleviate any respiratory distress and ensuring that vital organs receive an adequate supply of oxygen. This intervention can be especially critical in children, who may decompensate more quickly than adults in response to low oxygen levels.

While monitoring vital signs and assessing for potential causes like foreign body obstruction are important parts of comprehensive care, they may not provide immediate relief to the child experiencing low oxygen saturation. Likewise, reassurance and observation could lead to a delay in treatment, which is necessary given the low saturation levels.