Final answer:
The priority nursing intervention for hyperthermia is to lower the elevated body temperature using various methods, while monitoring vital signs to prevent organ failure.
Step-by-step explanation:
The priority nursing intervention for a patient with hyperthermia is to lower the elevated body temperature. This can be achieved through various methods, such as applying cooling blankets, administering antipyretics, using cooling baths, or employing advanced techniques like intravascular cooling devices.
Monitoring vital signs, particularly heart rate (HR) and stroke volume, is critical as hyperthermia can increase HR and the strength of heart contractions. In severe cases, excessive hyperthermia can lead to organ failure, starting with the central nervous system.