School of Chemistry and Biochemistry, The University of Western Australia, Crawley, Western Australia, Australia.
Breastfeed Med. 2012 Dec;7(6):442-7. doi: 10.1089/bfm.2011.0139. Epub 2012 Oct 5.
Simultaneous (SIM) breast expression saves mothers time compared with sequential (SEQ) expression, but it remains unclear whether the two methods differ in milk output efficiency and efficacy.
The Showmilk device (Medela AG, Baar, Switzerland) was used to measure milk output and milk ejection during breast expression (electric pump) in 31 Australian breastfeeding mothers of term infants (median age, 19 weeks [interquartile range, 10-33 weeks]). The order of expression type (SIM/SEQ) and breast (left/right) was randomized.
SIM expression yielded more milk ejections (p ≤ 0.001) and greater amounts of milk at 2, 5, and 10 minutes (p ≤ 0.01) and removed a greater total amount of milk (p ≤ 0.01) and percentage of available milk (p<0.05) than SEQ expression. After SIM expression the cream content of both the overall (8.3% [p ≤ 0.05]) and postexpression (12.6% [p ≤ 0.001]) milk were greater. During SEQ expression, the breast expressed first had a shorter time to 50% and 80% of the total amount of milk than the breast expressed second (p ≤ 0.05), but, overall, a similar percentage of available milk was removed from both breasts.
SIM expression stimulated more milk ejections and was a more efficient and efficacious method of expression, yielding milk with a higher energy content.
与序贯（SEQ）表达相比，同时（SIM）乳房表达可节省母亲的时间，但两种方法在乳汁产量效率和效果方面是否存在差异尚不清楚。
使用 Showmilk 装置（瑞士巴塞尔的 Medela AG）在 31 位澳大利亚足月婴儿母乳喂养母亲（中位年龄，19 周[四分位间距，10-33 周]）中测量哺乳期（电动泵）的乳汁产量和乳汁排出情况。表达类型（SIM/SEQ）和乳房（左/右）的顺序是随机的。
SIM 表达产生了更多的奶喷（p ≤ 0.001），并且在 2、5 和 10 分钟时的奶量更多（p ≤ 0.01），并排出了更多的总奶量（p ≤ 0.01）和可用奶量百分比（p<0.05）比 SEQ 表达。在 SIM 表达后，整体（8.3%[p ≤ 0.05]）和表达后（12.6%[p ≤ 0.001]）牛奶的奶油含量均更高。在 SEQ 表达过程中，首先表达的乳房比第二个乳房达到总奶量的 50%和 80%的时间更短（p ≤ 0.05），但总体而言，从两个乳房中取出的可用奶量百分比相似。
SIM 表达刺激了更多的奶喷，是一种更有效和高效的表达方法，产生的乳汁能量更高。
