Tympanic temperature is a core temperature in humans
1989; Elsevier BV; Volume: 14; Issue: 1 Linguagem: Inglês
10.1016/0306-4565(89)90029-6
ISSN1879-0992
Autores Tópico(s)Infrared Thermography in Medicine
Resumo1.The validity of lympanic temperature as an index of core temperature can be questioned since it has been found to be affected by ambient temperature during exposure to cold. This work has been undertaken to explore the possible influence of head skin temperature on tympanic temperature. 2.In a group of ten subjects at rest, mean temperature on the lower anterior quarter of the tympanic membrane was 0.1°C higher than oesophageal temperature. 3.Tympanic, oesophageal, interdigital, and mastoid skin temperatures were recorded in 6 subjects during 30 min exposure to cold at 0°C and the following 15 min (control). When the thermocouple was placed on the lower anterior quarter of the tympanic membrane, the influence of skin temperature on tympanic temperature was as low as 0.006°C per °C fall in skin temperature, and the influence of air temperature as low as 0.0025°C per °C fall in air temperature. At cold ambient temperature, the changes in tympanic temperature were strikingly parallel to those of oesophageal temperature whereas skin temperature generally evolved in the opposite direction. 4.These results suggest that tympanic temperature, when measured accurately, is a good index of core temperature and that its variations may reflect variations in brain temperature.
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