Our aim was to obtain a better understanding of the differences between breast-feeding and bottle-feeding, particularly with regard to how sucking performance changes from nonnutritive sucking (NNS) to nutritive sucking (NS). Twenty-two normal term infants were studied while breast-feeding at 4 and 5 d postpartum. Five of the 22 infants were exclusively breast-fed, but we tested the other 17 infants while breast-feeding and while bottle-feeding. Before the milk ejection reflex (MER) occurs, little milk is available. As such, infants perform NNS before MER. For bottle-feeding, a one-way valve was affixed between the teat and the bottle so that the infants needed to perform NNS until milk flowed into the teat chamber. At the breast, the sucking pressure (–93.1 ± 28.3 mm Hg) was higher during NNS compared with NS (–77.3 ± 27.0 mm Hg). With a bottle, the sucking pressure was lower during NNS (–27.5 ± 11.2 mm Hg) compared with NS (–87.5 ± 28.5 mm Hg). Sucking frequency was higher and sucking duration was shorter during NNS compared with that during NS both at the breast and with a bottle. There were significant differences in the changes of sucking pressure and duration from NNS to NS between breast- and bottle-feeding. The change in sucking pressure and duration from NNS to NS differed between breast-feeding and bottle-feeding. Even with a modified bottle and teats, bottle-feeding differs from breast-feeding.Abbreviations: MER, milk ejection reflex; NNS, non-nutritive sucking; NS, nutritive sucking
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机译：我们的目的是更好地了解母乳喂养和奶瓶喂养之间的差异，尤其是在吸吮性能如何从非营养性吮吸（NNS）变为营养性吮吸（NS）方面。研究了22名正常足月婴儿，在产后4和5 d进行母乳喂养。 22例婴儿中有5例是纯母乳喂养的，但我们在母乳喂养和奶瓶喂养期间对其他17例婴儿进行了测试。在排乳反射（MER）发生之前，几乎没有牛奶。因此，婴儿在MER之前进行NNS。为了进行奶瓶喂养，在奶嘴和奶瓶之间安装了一个单向阀，以便婴儿需要进行NNS直到牛奶流入奶头腔。在NNS期间，乳房的吸吮压力（–93.1±28.3 mm Hg）高于NS（–77.3±27.0 mm Hg）。使用瓶子时，与NS（–87.5±28.5 mm Hg）相比，NNS（–27.5±11.2 mm Hg）的吸吮压力更低。与在NS期间相比，在NNS期间吸乳的频率更高，吸乳时间更短。母乳喂养和奶瓶喂养之间，从NNS到NS的吸吮压力和持续时间的变化存在显着差异。从NNS到NS的吸吮压力和持续时间的变化在母乳喂养和奶瓶喂养之间有所不同。即使使用改良的奶瓶和奶嘴，奶瓶喂养也不同于母乳喂养。 NNS，非营养性吮吸; NS，营养性吮吸
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