Which procedure would require the nurse to have oxygen available for an infant with heart failure?

The procedure that would require the nurse to have oxygen available for an infant with heart failure is administering vaccinations. In infants with heart failure, any medical procedure that causes stress or discomfort, such as receiving vaccinations, can potentially lead to an increased demand for oxygen. This is particularly important in a pediatric population where cardiac function is already compromised.

When undergoing a vaccination, the infant may exhibit responses like crying or agitation, which can increase heart rate and respiratory demands. Having supplemental oxygen available ensures that if the infant shows signs of respiratory distress or hypoxia during or after the procedure, the nurse can respond promptly to support the infant's oxygenation needs. This precaution is crucial, particularly in those with existing cardiovascular or respiratory concerns.

In contrast, other scenarios such as during naps, while nursing, or after being held typically do not involve the same risk of sudden stress or physical demand that would necessitate ready access to oxygen. Each of these scenarios may present a different set of considerations for the infant's care, but none creates an immediate need for supplemental oxygen like the administration of vaccinations does in this context.