Woodson R, Hamilton C
Department of Psychology, University of Texas, Austin 78713.
Dev Psychobiol. 1988 Apr;21(3):207-13. doi: 10.1002/dev.420210302.
A laboratory and a field experiment used within-subject designs to test the hypothesis that nonnutritive sucking (NNS) reduces heart rate (HR) in preterm infants. Infants in Experiment A were provided a standard pacifier nipple for 30 min under strictly controlled conditions. In the field Experiment B, nursing staff provided infants with a standard pacifier during alternate intervals in a sequence of four interfeed intervals spanning 12 hr. NNS significantly reduced average HR in each experiment. Given the strongly positive relationship between HR and energy expenditure, these results suggest that NNS reduces energy expenditure in preterm infants. Such an effect, in turn, could help to explain how the opportunity to engage in NNS enhances growth in preterms.
一项实验室实验和一项现场实验采用了被试内设计，以检验非营养性吸吮（NNS）会降低早产儿心率（HR）这一假设。在实验A中，在严格控制的条件下，为婴儿提供一个标准奶嘴30分钟。在现场实验B中，护理人员在12小时内四个喂奶间隔的交替时间段为婴儿提供标准奶嘴。在每个实验中，NNS均显著降低了平均心率。鉴于心率与能量消耗之间存在强正相关关系，这些结果表明NNS可降低早产儿的能量消耗。反过来，这种效应有助于解释进行NNS的机会是如何促进早产儿生长的。
