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Related Experiment Videos

Unexplained fever and chronic fatigue: abnormal circadian temperature pattern.

F Camus1, D Henzel, M Janowski

  • 1Service d'Explorations Fonctionnelles, Hôpital Bichat-Claude-Bernard, Paris.

The European Journal of Medicine
|April 1, 1992
PubMed
Summary

Investigating circadian thermic patterns revealed distinct temperature profiles in patients with unexplained fever and chronic fatigue. These abnormal central temperature patterns offer insights for managing febrile conditions.

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Area of Science:

  • Physiology
  • Chronobiology
  • Internal Medicine

Background:

  • Persistent fever and fatigue can occur without identifiable organic causes.
  • Standard investigations may not always pinpoint the origin of unexplained fever.
  • Circadian rhythm disturbances are implicated in various chronic conditions.

Purpose of the Study:

  • To investigate the circadian thermic pattern in patients with unexplained fever and chronic fatigue.
  • To compare these patterns with those in patients with fever of recognized origin and healthy controls.
  • To identify potential biomarkers for unexplained fever and fatigue.

Main Methods:

  • Continuous 24-hour central temperature recording in three groups: unexplained fever/fatigue, recognized fever, and healthy controls.

Related Experiment Videos

  • Application of Fourier series for harmonic analysis of temperature data.
  • Statistical and factorial analysis to identify group-specific thermic patterns.

    • Main Results:

    • Distinct circadian thermic patterns were identified for each group.
    • Patients with unexplained fever and chronic fatigue exhibited specific alterations in phase, amplitude of the fundamental harmonic, and minimum circadian temperature.
    • These findings differentiate unexplained fever from fever of known origin.

    Conclusions:

    • Abnormal central temperature patterns are characteristic of patients with unexplained fever and chronic fatigue.
    • Circadian thermic pattern analysis may be a valuable tool in the management of febrile patients.
    • Further research into these patterns could lead to improved diagnostic and therapeutic strategies.