Ramsay Donna T, Mitoulas Leon R, Kent Jacqueline C, Larsson Michael, Hartmann Peter E
Biochemistry and Molecular Biology, School of Biomedical and Chemical Sciences, University of Western Australia, Crawley, Australia.
J Hum Lact. 2005 Nov;21(4):421-8. doi: 10.1177/0890334405280878.
This study aimed to use ultrasound imaging to investigate the milk ejection characteristics of women during a 10-minute expression using an electric breast pump capable of applying 2 markedly different vacuum patterns. The classic pattern (47 cycles/min) and 3-phase pattern (pre-milk ejection: 120 cycles/min, post-milk ejection: 20 cycles/min for 2 minutes post-milk ejection then 55-78 cycles/min for 8 minutes) were tested, and the milk expressed was collected in 30-second intervals. Multiple milk ejections (96%) were detected (classic: 3.27+/-2.05; 3-phase: 3.72+/-1.19) and associated with increases in milk flow. Almost half of the total volume of milk expressed was removed during the first milk ejection (classic: 41.38+/-21.48%; 3-phase: 46.72+/-26.60%). There was no correlation between the number of milk ejections and both the total volume of milk and percentage of available milk for either pattern. In conclusion, milk ejection characteristics and efficiency of milk expression did not change in response to different expression patterns.
本研究旨在利用超声成像技术，通过一台能够施加两种明显不同真空模式的电动吸奶器，对女性在10分钟吸乳过程中的喷乳特征进行研究。测试了经典模式（47次/分钟）和三相模式（喷乳前：120次/分钟，喷乳后：喷乳后2分钟内20次/分钟，然后8分钟内55 - 78次/分钟），并以30秒为间隔收集吸出的乳汁。检测到多次喷乳（96%）（经典模式：3.27±2.05；三相模式：3.72±1.19），且与乳汁流量增加相关。在第一次喷乳期间，几乎一半的吸出乳汁总量被吸出（经典模式：41.38±21.48%；三相模式：46.72±26.60%）。两种模式下，喷乳次数与乳汁总量及可吸出乳汁百分比之间均无相关性。总之，不同吸乳模式下喷乳特征和吸乳效率没有变化。
