Premature infants provided NNS before feeding have been shown to spend more time in quiet awake state and less time in active sleep, drowsiness, active awake and crying states.

• (2)喂食前吸吮安抚奶嘴的行为状态，处于安静警觉状态的平均喂奶速率，明显地快于其他状态的平均喂奶速率。(3)早产儿在喂食前吸吮安抚奶嘴其后的喂食表现明显优于吸吮安抚奶嘴之后的喂食。