Putet G, Stupfel M, Gourlet V, Salle B, Court L
Service de Néonatalogie et de Réanimation néonatale, Hôpital Edouard-Herriot, Lyon, France.
Chronobiologia. 1990 Jan-Mar;17(1):1-13.
Oxygen consumption (VO2) and carbon dioxide emission (VCO2) have been continuously recorded for 24 consecutive hours in 7 premature infants with a range of gestational age of 29-31 weeks at birth, and placed in incubators within a thermal neutral limit. These infants, submitted to continuous light, were fed every 3-4h through a gastric tube which was left in their stomachs throughout the whole experiment. Variance and spectral analyses performed on VCO2 values sampled on the recordings every 10 min showed ultradian variations, in the 40 min-6 h period range, which represent 20 and even 40% of the mean level. Moreover 5 out of the 7 premature infants show ultradian VCO2, VO2 and respiratory quotient rhythms related to feeding frequency.
对7名出生时胎龄在29 - 31周之间的早产儿连续24小时持续记录耗氧量（VO2）和二氧化碳排放量（VCO2），并将他们置于热中性范围内的保育箱中。这些婴儿处于持续光照下，每3 - 4小时通过胃管喂食一次，胃管在整个实验过程中一直留在胃内。对每10分钟从记录中采样的VCO2值进行方差和频谱分析，结果显示在40分钟至6小时的时间段内存在超日变化，其幅度占平均水平的20%甚至40%。此外，7名早产儿中有5名显示出与喂食频率相关的超日VCO2、VO2和呼吸商节律。
