Greco L, Capasso A, De Fusco C, Paludetto R
Department of Paediatrics, University of Naples, Italy.
Arch Dis Child. 1990 Apr;65(4 Spec No):373-6. doi: 10.1136/adc.65.4_spec_no.373.
The weight increment profiles of 20 low birthweight babies measured during the first two months of extrauterine life were analysed. The babies were weighed daily, and the weight profiles showed minor irregularities when compared with an interpolated linear trend. When increments were plotted at two week intervals a linear increase in weight velocity was seen, but when increments were computed every three days, the velocity profile was non-linear and pulsatile. All cases studied showed regular pulsatile patterns of weight velocity during the first two months of life. A mean profile of the 20 babies permitted estimation of the periodicity of the pulsing: the cycle alternated every nine to 11 days. A non-linear pattern was found in the published series of unsmoothed data that have been widely adopted as standards for growth in low birthweight babies.
分析了20名低出生体重儿在宫外生活头两个月的体重增加情况。这些婴儿每天称重，与插值线性趋势相比，体重情况显示出轻微的不规则性。当以两周为间隔绘制体重增加量时，可看到体重增长速度呈线性增加，但当每三天计算一次体重增加量时，增长速度曲线是非线性且呈脉冲式的。所有研究病例在出生后头两个月体重增长速度均呈现出规律的脉冲模式。对这20名婴儿的平均情况进行分析，可估算出脉冲的周期：周期每9至11天交替一次。在已广泛用作低出生体重儿生长标准的已发表的未平滑数据系列中发现了非线性模式。
