Abstract

Recent studies have shown that ventilation in the newborn period is affected by sleep state. We investigated various measures affecting ventilation using the single breath airway occlusion technique in ten healthy, full-term newborn infants. There was a significant increase in respiratory rate and in minute ventilation in rapid eye movement sleep compared to non-REM sleep, and there was no significant change in tidal volume between the two sleep states. The variability of ventilation was increased in REM sleep, and inspiratory pressure at one-tenth of a second following airway occlusion was significantly increased in REM sleep. Effective elastance was similar in both sleep states. Measures that reflect activity of the Hering-Breuer reflex were significantly increased in non-REM sleep as compared with REM sleep. These results document the interdependence of sleep state and respiratory control mechanisms in full-term infants.

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