Upon admitting a child with pertussis, what is the first nursing action to undertake?

In the context of a child admitted with pertussis, obtaining a pulse oximetry reading is crucial as it provides immediate and vital information about the child's oxygen saturation levels. Pertussis, or whooping cough, can significantly affect the respiratory system, leading to potentially severe complications such as decreased oxygenation. By assessing the pulse oximetry first, the healthcare provider can determine whether the child is hypoxic and in need of urgent interventions.

This initial assessment allows for swift triage, informing subsequent actions and priorities in care, such as administering supplemental oxygen if necessary or determining the urgency of other interventions. Monitoring oxygen levels is a foundational step in managing respiratory illness, especially in pediatric patients who may not be able to communicate their distress effectively.

While other actions, such as administering antibiotics, conducting a physical assessment, or gathering a medical history, are important in the overall management of the child's condition, they do not address the immediate need to ensure the child’s airway and respiratory status are stable. Therefore, pulse oximetry becomes the priority in this scenario.