How does Braun ThermoScan work?
Braun ThermoScan measures the infrared heat generated by the eardrum and surrounding tissues. To
help avoid inaccurate temperature measurements, the probe tip is warmed to a temperature close to
that of the human body. When the Braun ThermoScan is placed in the ear, it continuously monitors
the infrared energy. The measurement is finished and the result displayed when the thermometer
detects that an accurate temperature measurement has been taken.
Why measure in the ear?
The goal of thermometry is to measure core body temperature
1
which is the temperature of the vital
organs. Ear temperatures accurately reflect core body temperature
2
, since the eardrum shares blood
supply with the temperature control center in the brain
3
, the hypothalamus. Therefore, changes in
body temperature are reflected sooner in the ear than at other sites. Axillary temperatures measure
skin temperature and may not be a reliable indicator of core body temperature. Oral temperatures are
influenced by drinking, eating and mouth breathing. Rectal
temperatures often lag behind changes in core body temperature and there is a risk of cross-
contamination.