Objective:To evaluate the practical value of Infrared forehead thermometer (IFT)s in body temperature screening and provide evidence-based recommendations for optimizing measurement site selection in febrile patients. Methods: For the pre examination triage patients, the forehead temperature gun was used to select the forehead (forehead method), wrist (wrist method) and neck (neck method) for temperature measurement, and the mercury thermometer was used to measure the axillary temperature (standard method). Results: A total of 178 fever patients were included and their body temperature was measured at three different surface areas using a frontal thermometer. The results showed that the neck method >forehead method>wrist method, and had a statistically significant difference (P<0.001); Compared with the fever patients measured in the standard method, the neck method had the highest Screening accuracy with reaching 91.57%.According to the sunset time, a day is divided into three time periods. There is a statistically significant difference in body temperature between the neck method and the standard method during the pre sunrise time period (22:00-7:00) and post sunrise time period (7:00-15:00) after sunset. However, there is no significant difference in body temperature measured between the two methods during the pre sunset time period (15:00-22:00) after sunrise, and the neck method has the highest Screening accuracy of 97.22% during this time period. Conclusion:The forehead temperature gun measures the body temperature of different parts of fever patients, with the highest accuracy and Screening accuracy in the neck. The position of neck should be chosed firstly. During a specific time period of the day, the neck temperature measured by a forehead thermometer can replace the temperature measured by a mercury thermometer.
