Ear temperature gun is a non-contact telemetering and temperature measuring instrument, which determines the body temperature by detecting the infrared spectrum emitted by the tympanic membrane. According to the theory of blackbody radiation, the infrared spectra produced by objects with different temperatures are different. It can be displayed by using the thermopile infrared detector with an accuracy of 0. 1℃ and then converting the readings with a microcomputer.
There is a place deep in the brain called the inferior colliculus, which has a fixed-point structure and dominates the body's constant temperature. The inferior colliculus is also the center of human body temperature. Therefore, the hypothalamus is the earliest place where the body temperature rises, and the blood flow supplying the eardrum happens to communicate with the hypothalamus. Therefore, it is most appropriate to use the temperature of the eardrum to reflect the temperature of the human body, and the eardrum is also the earliest place to detect whether the human body has a fever.
Precautions for using ear thermometer:
It is best to use a new outer membrane sleeve every time. If the outer film is not enough, you can use plastic wrap, but it is more troublesome. The deeper the gun head, the better, but don't cause discomfort. When measuring children, it is best to gently pull the ear back (straighten the ear canal), and it is best to measure both ears evenly, even three times in one ear, and take the highest value (because there may be an error of 0. 1℃ ~ 0.3℃ on both sides). Avoid measuring if you have just been exposed to the sun for too long or just exercised, otherwise the measured value may be higher than the actual temperature.
Because of the change of environment, basically everyone's physical condition and living environment will be different, so although everyone's body temperature remains the same, there will be some differences. Under normal circumstances, it is normal for the patient's body temperature to wander at or around 37 degrees, and it is also normal to have transient abnormal body temperature, so it is more accurate to wander at or around 37 degrees.