Hill P D, Aldag J C, Chatterton R T
College of Nursing, University of Illinois at Chicago, Rock Island 61201, USA.
J Hum Lact. 1996 Sep;12(3):193-9. doi: 10.1177/089033449601200315.
Mothers who must express milk for a prolonged period frequently report that milk volumes decrease. The purpose of this pilot study was to assess the feasibility of having a sample of lactating mothers of preterm infants follow a specific breast pumping protocol, express milk mechanically for six weeks, and have a subsample consent to venipuncture. This pilot study compared the effects of pumping breasts sequentially or simultaneously on milk volume and prolactin levels in mothers of preterm infants. Nine lactating mothers were randomly assigned to a sequential single or simultaneous double electric breast pumping system. Prolactin levels were examined in four mothers on days 21 and 42 postpartum. The sequential single and simultaneous double groups had mean baseline prolactin levels of 50.8 ng/ml and 40.6 ng/ml, respectively on day 21, and 26.6 ng/ml and 34.5 ng/ml, respectively, on day 42 postpartum. At 9 and 12 weeks postpartum mothers were queried about their lactational status. The results suggested that milk yield may be maintained or increased with frequent use of the simultaneous double pumping system. Further study is needed to confirm results of this pilot study.
必须长时间挤奶的母亲经常报告说奶量会减少。这项初步研究的目的是评估让一组早产婴儿的哺乳期母亲遵循特定的挤奶方案、机械挤奶六周，并让一个子样本同意进行静脉穿刺的可行性。这项初步研究比较了依次或同时挤奶对早产婴儿母亲奶量和催乳素水平的影响。九名哺乳期母亲被随机分配到依次单泵或同时双泵电动挤奶系统。在产后第21天和第42天对四名母亲的催乳素水平进行了检测。依次单泵组和同时双泵组在产后第21天的催乳素平均基线水平分别为50.8纳克/毫升和40.6纳克/毫升，在产后第42天分别为26.6纳克/毫升和34.5纳克/毫升。在产后9周和12周时询问母亲们的泌乳状况。结果表明，频繁使用同时双泵系统可能会维持或增加奶量。需要进一步的研究来证实这项初步研究的结果。
