PMID: 9170781Jan 1, 1996Paper

Exercise-induced hyperthermia may prevent accurate core temperature measurement by tympanic membrane thermometer

Journal of Nursing Measurement
S Yeo, M Scarbough

Abstract

The purpose of this study was to assess the effect of exercise-induced hyperthermia on brain and deep trunk temperature measurement in order to determine the optimal temperature site of the body for varying nursing practices in outpatient clinical settings. Eight women, 18 to 50 years old (30.9 +/- 12.6; mean +/- SD), participated in the study. Subjects were asked to perform their regular aerobic exercise in a natural environment while body temperature (ear and rectal) and heart rate (HR) were measured simultaneously and repeatedly before, during, and after exercise. Glass mercury rectal thermometers were used for measurement of deep trunk temperature, an infrared tympanic membrane thermometer for measurement of brain temperature, and a portable heart rate monitor for monitoring heart rate. Rectal temperature was higher than ear temperature for all but one of the 40 pairs of observation. The time pattern varied for the two modes of temperature (F = 9.67; df 4,28; p < .001). Rectal temperature changed over time (F = 7.86; df 4,28; p < .002), and ear temperature did not (F = 1.5; df 4,28; p = .25), indicating that ear temperature did not respond to exercise. While rectal temperature was strongly correlated with HR (r = .60), ear ...Continue Reading

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