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Consequences of a small decrease of air temperature from thermal equilibrium on thermoregulation in sleeping neonates

F Telliez1, V Bach, G Krim

  • 1Physiological & Behavioural Research Unit (EA 2088), Medical Faculty, University of Picardy, Jules Verne, Amiens, France.

Medical & Biological Engineering & Computing
|November 28, 1997
PubMed
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New incubator heating systems aim for thermal equilibrium in neonates. This study finds thermal equilibrium aligns with thermoneutrality, suggesting it defines a thermal comfort zone for infants.

Area of Science:

  • Neonatal physiology
  • Thermal regulation
  • Environmental control systems

Background:

  • Neonatal intensive care requires precise control of the thermal environment.
  • Existing incubator systems aim to maintain thermal equilibrium between neonates and their surroundings.
  • Defining optimal thermoneutral ranges is crucial for infant well-being.

Purpose of the Study:

  • To determine if thermal equilibrium, achieved via a servocontrolled skin temperature derivative system, falls within the thermoneutral range.
  • To assess if thermal equilibrium can define an optimal thermal environment for neonates.
  • To investigate the impact of slight temperature deviations from equilibrium on neonatal physiological and behavioral parameters.

Main Methods:

  • Utilized a novel servocontrolled skin temperature derivative system for incubator thermal management.

Related Experiment Videos

  • Monitored neonatal oxygen consumption (VO2) and body temperature to assess thermal equilibrium.
  • Analyzed physiological and behavioral responses to controlled thermal environments.

    • Main Results:

    • Thermal equilibrium, as defined by oxygen consumption and body temperature, meets the criteria for thermoneutrality.
    • Slight decreases (1-1.5°C) from thermal equilibrium, while maintaining near-neutrality by VO2, induced sleep disturbances and increased body movements.
    • Oxygen consumption remained stable across a wider temperature range than parameters indicating sleep and movement, suggesting a narrower optimal zone.

    Conclusions:

    • Thermal equilibrium achieved through the new system aligns with established definitions of thermoneutrality.
    • The findings suggest that thermal equilibrium may represent a thermal comfort zone for neonates.
    • Optimal thermal environments for neonates may be more narrowly defined by behavioral and sleep parameters than by metabolic rate alone.