The effect of sleep state on active thermoregulation in the premature infant.

Abstract:

:Alterations in thermoregulatory mechanisms related to sleep state may play an important role in the problems of homeostasis experienced by the premature infant. In the adult, homeothermic regulation of body temperature may be suspended during REM. We measured oxygen consumption (VO2) in six premature infants 33-35 wk gestation both at thermoneutrality and during a mild thermal stress to determine whether thermoregulatory responses were intact during REM sleep. All infants were studied under radiant warmers. Skin temperature was allowed to fall 7-8 times during a 6-8 h study period while VO2, VCO2, heart rate and TcPO2 were continuously recorded. Sleep state was scored using EEG, EOG, EMG and behavioral criteria. A total of 1,162 one-min epochs were scored. In all states including REM, VO2 was significantly higher during the cool periods. The mean increases: 21.5%, 23.3%, 11.1% and 5.3% for Awake, Indeterminate, REM and NREM respectively. When REM and NREM were compared at thermoneutrality, there was no difference in the VO2 (8.80 +/- 0.11 and 8.93 +/- 0.15 cc/kg/min, mean +/- S.E., for REM and NREM, respectively). We conclude that in contrast to the adult, active thermoregulation occurs in the premature infant during REM sleep.

journal_name

Pediatr Res

journal_title

Pediatric research

authors

Darnall RA Jr,Ariagno RL

doi

10.1203/00006450-198207000-00002

subject

Has Abstract

pub_date

1982-07-01 00:00:00

pages

512-4

issue

7

eissn

0031-3998

issn

1530-0447

journal_volume

16

pub_type

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