Putet G, Salle B, Gourlet V, Stupfel M
C R Acad Sci III. 1986;302(11):405-8.
Oxygen consumption (VO2) and carbon dioxide production (VCO2) were continuously measured in premature human (mean gestation age of 31 weeks at birth), nursed in incubators within a neutral thermal environment and submitted to a continuous lighting. At a mean postnatal age of 30 days, and for a mean body weight of 1.8 kg, spectral analysis shows VO2 and VCO2 ultradian variations of mean and low frequencies (2 less than f less than 80 c.day--1; i.e. periods 12 greater than t greater than 0.3 hr). It is hypothesized that these periodic variations can be compared to those previously evidenced in small laboratory vertebrates and in macaques.
对出生时平均胎龄为31周的早产人类进行了氧气消耗（VO₂）和二氧化碳产生（VCO₂）的连续测量，这些婴儿在中性热环境的培养箱中护理，并处于持续光照下。在出生后平均30天、平均体重1.8千克时，频谱分析显示VO₂和VCO₂存在平均频率和低频的超日变化（2＜f＜80次/天⁻¹；即周期12＞t＞0.3小时）。据推测，这些周期性变化可与先前在小型实验脊椎动物和猕猴中发现的变化相比较。
