OBJECTIVE: The aim of this study was to determine whether milk ejection occurs asynchronously in the human lactating breast.
METHODS: Retrospective analysis of videos made of ultrasound monitoring of milk ducts during pumping. Six video clips (4 women) of ultrasound monitored milk ejections showed obvious differences in the timing of milk flow between different main milk ducts. Duct diameter was simultaneously measured every second in 2 different ducts that drained 2 separate lobes of the breast.
RESULTS: For 5 of 6 ultrasound duct monitoring sessions, both duct dilation and visualization of milk flow in the 2 separate main milk ducts differed by 2 to 8 seconds. For the remaining woman, milk was observed to eject from 1 part of the lobe, and when not removed, it flowed in a retrograde fashion into a different part of the lobe.
CONCLUSIONS: Asynchrony of milk ejection occurs in the human lactating breast, suggesting that the timing of myoepithelial cell response differs, resulting in heterogeneous emptying of the gland.
目的:本研究的目的是确定人类泌乳过程中是否异步发生排乳。
方法:回顾性分析抽吸过程中超声监测乳导管的视频。超声监测的六个视频剪辑(4名女性)牛奶喷射显示,不同主乳导管之间的牛奶流动时间存在明显差异。在排出乳房的2个单独的叶的2个不同的导管中每秒同时测量导管直径。
结果:对于6次超声导管监测会话中的5次,导管扩张和2个独立的主乳管中的乳流可视化相差2至8秒。对于剩下的女人,观察到牛奶从叶的一部分喷出,当不删除时,它以逆行的方式流入肺叶的不同部分。
结论:在人类泌乳的乳房中发生排乳的不同步性,这表明肌上皮细胞反应的时机不同,导致腺体的异质排空。