Berger Irit, Weintraub Valentin, Dollberg Shaul, Kopolovitz Rozalia, Mandel Dror
Department of Neonatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.
Pediatrics. 2009 Dec;124(6):e1149-52. doi: 10.1542/peds.2009-0165. Epub 2009 Nov 23.
We hypothesized that resting energy expenditure (REE) would be higher after breastfeeding than after bottle-feeding.
Nineteen preterm infants (gestational age: 32 weeks) in stable condition who were nourished entirely with their mothers' breast milk were assigned randomly to feeding either by bottle or at the breast. Each infant served as his or her own control subject. REE was measured for 20 minutes after feeding. Breast milk quantity was evaluated with prefeeding and postfeeding weighing. REE values for bottle-feeding and breastfeeding were compared with paired t tests.
Contrary to our null hypothesis, the group's mean REE values after bottle-feeding and breastfeeding were very similar (284.7 +/- 26.8 kJ/kg per day [68.3 +/- 6.4 kcal/kg per day] vs 282.6 +/- 28.5 kJ/kg per day [67.5 +/- 6.8 kcal/kg per day]; not significant). The duration of feeding was significantly longer for breastfeeding than for bottle-feeding (20.1 +/- 7.9 vs 7.8 +/- 2.9 minutes; P < .0001).
There was no significant difference in REE when infants were breastfed versus bottle-fed. Longer feeding times at the breast did not increase REE. We speculate that it is safe to recommend feeding at the breast for infants born at >32 weeks when they can tolerate oral feeding.
我们假设母乳喂养后静息能量消耗（REE）会高于奶瓶喂养后。
19名病情稳定的早产儿（胎龄：32周）完全以母乳为食，被随机分配为奶瓶喂养或亲喂。每个婴儿作为自身的对照对象。喂养后测量20分钟的REE。通过喂养前和喂养后的称重来评估母乳量。使用配对t检验比较奶瓶喂养和母乳喂养的REE值。
与我们的无效假设相反，奶瓶喂养组和母乳喂养组的平均REE值非常相似（分别为284.7±26.8千焦/千克/天[68.3±6.4千卡/千克/天]和282.6±28.5千焦/千克/天[67.5±6.8千卡/千克/天]；无显著差异）。母乳喂养的持续时间显著长于奶瓶喂养（分别为20.1±7.9分钟和7.8±2.9分钟；P<.0001）。
婴儿母乳喂养与奶瓶喂养时的REE无显著差异。亲喂时间较长并不会增加REE。我们推测，对于孕周>32周且能耐受经口喂养的婴儿，推荐亲喂是安全的。
