Kent Jacqueline C, Mitoulas Leon R, Cregan Mark D, Geddes Donna T, Larsson Michael, Doherty Dorota A, Hartmann Peter E
Biochemistry and Molecular Biology, School of Biomedical, Biomolecular and Chemical Sciences, Faculty of Life and Physical Sciences, The University of Western Australia, Crawley, Western Australia, Australia.
Breastfeed Med. 2008 Mar;3(1):11-9. doi: 10.1089/bfm.2007.0028.
To determine the effect of the strength of applied vacuum on the flow rate and yield of breastmilk using an electric breast pump.
Twenty-one breastfeeding mothers and two expressing mothers expressed their breastmilk for 15 minutes using an electric breast pump set at their own maximum comfortable vacuum, and at one to three softer vacuums. Milk yield and flow rate were measured.
At the maximum comfortable vacuum (-190.7 +/- 8.8 mm Hg) 4.3 +/- 0.4 milk ejections occurred during 15 minutes of expression and yielded 118.5 +/- 11.4 mL of milk (65.5 +/- 4.1% of the available milk). Softer vacuums yielded less milk volume (p < 0.05) and less of the available milk (p < 0.01). Milk flow rate was greater during the first milk ejection than the third or subsequent milk ejections (p < 0.001). Cream content of the milk was highest after expressing for 15 minutes using the mother's maximum comfortable vacuum.
Use of the mother's maximum comfortable vacuum enhances milk flow rate and milk yield. The cream content of the milk at the end of the expression period was an indicator of how effectively the breast had been drained.
使用电动吸奶器确定施加的真空强度对母乳流速和产量的影响。
21名母乳喂养的母亲和2名挤奶的母亲使用电动吸奶器，在她们自己舒适的最大真空度以及比该真空度低一至三级的较弱真空度下，挤奶15分钟。测量产奶量和流速。
在舒适的最大真空度（-190.7±8.8毫米汞柱）下，挤奶15分钟期间出现4.3±0.4次喷乳，产奶118.5±11.4毫升（占可获取乳汁的65.5±4.1%）。较弱的真空度产奶量较少（p<0.05），占可获取乳汁的比例也较小（p<0.01）。第一次喷乳时的奶流速大于第三次或随后喷乳时的奶流速（p<0.001）。使用母亲舒适的最大真空度挤奶15分钟后，乳汁中的乳脂含量最高。
使用母亲舒适的最大真空度可提高奶流速和产奶量。挤奶结束时乳汁中的乳脂含量是乳房排空效果的一个指标。
