Final answer:
The nurse should prioritize isolating the child to prevent the potential spread of an infectious condition, such as chickenpox.
Step-by-step explanation:
The nurse should identify isolating the child to prevent potential spread of an infectious condition as the priority intervention. The presence of fluid-filled vesicles on the trunk and extremities suggests a possible viral infection, such as chickenpox. Chickenpox is highly contagious and can spread easily from person to person through direct contact or respiratory droplets. By isolating the child, the nurse can help prevent the spread of the virus to other patients and healthcare providers.
Administering fever-reducing medications and monitoring the child's vitals continuously are important interventions, but they are not the priority in this case. Fever-reducing medications can help alleviate the child's discomfort and reduce fever, while continuous monitoring of vitals can help assess the child's condition and detect any signs of deterioration. However, preventing the potential spread of the infectious condition should be the nurse's priority to ensure the safety of other individuals in the ED.
Requesting a consultation with a dermatologist may be necessary in some cases, but it is not the priority intervention in this situation. The nurse should focus on immediate actions to prevent the spread of the infection.