Människokroppen temperatur
September 5, - By Nina Bai. Average body temperature is about Most of us can recite A new study by Stanford Medicine scientists found that normal body temperature varies from person to person, depending on their age, sex, height and weight, among other factors — and it fluctuates throughout the day.
människokroppen temperatur3
The normal body temperature of a tall, underweight, year-old man in the morning, for instance, could be nearly 1 degree lower than that of a short, obese year-old woman in the afternoon. She is the senior author of the study that was published Sept. The often-cited standard of German physician Carl Reinhold August Wunderlich took more than a million temperature measurements from some 25, patients.
In fact, Wunderlich reported a range of temperatures in this group — noting that men and the elderly had lower temperatures than women and young adults, and that temperatures were higher in the afternoon. But it was the overall average, The researchers analyzed , oral temperature measurements from adult outpatients seen at Stanford Health Care from to First, to ensure that the temperatures were not skewed by illness, the researchers applied a machine learning algorithm to identify diagnoses and medications that were disproportionately associated with extremely high or extremely low temperatures.
Kroppstemperatur – Wikipedia
All patient visits with these diagnoses, about a third of the total, were excluded from the analysis. The excluded diagnoses included those related to infectious diseases, which were linked to high temperatures; surprisingly, Type 2 diabetes was linked to low temperatures, an association that had not been established previously. From the remaining data, they found that adults have normal temperatures ranging from Next, the researchers used a statistical model to relate patient characteristics and time of day to temperature.
Men tended to have lower temperatures than women. Temperatures decreased with age, decreased slightly with height and increased with weight. The factor with the most influence, however, was time of day, with temperatures coolest in the early morning and warmest around 4 in the afternoon.
Normal body temperature is personal, Stanford Medicine researchers find
That means other factors not included in this study, such as clothing, physical activity, menstrual cycle, measurement error, weather — even drinking a hot or cold beverage — are likely also at play. Individualized benchmarks could make body temperature a more accurate and useful vital sign, Parsonnet said. She recounted the experience of her elderly mother-in-law who had a serious heart infection, but was not diagnosed for weeks because her temperature never reached a conventional fever, usually defined as higher than She wonders whether an individualized temperature evaluation would have detected the illness earlier.
Future studies could look at personalized definitions of fever and whether having a consistently higher or lower normal temperature affects life expectancy, Parsonnet said. Stanford Medicine is an integrated academic health system comprising the Stanford School of Medicine and adult and pediatric health care delivery systems. Together, they harness the full potential of biomedicine through collaborative research, education and clinical care for patients.
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