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Effect of Vacuum Profile on Breast Milk Expression Using an Electric Breast PumpThe University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia
Women and Infants Research Foundation and The University of Western Australia Department of Obstetrics and Gynaecology, King Edward Memorial Hospital, Subiaco, Western Australia
Medela AG, Baar, Switzerland
The University of Western Australia, Crawley, Western Australia The authors compared milk expession using 5 experimental vacuum patterns and a commercially available vacuum pattern ranging in cycle times (20 to 78 cycles/min) and vacuum curve dynamics in 30 mothers using an experimental, software-controlled electric breast pump. The volume of milk removed over 5 minutes differed (P= .0072) between patterns (range = 62.8 ± 6.6m Lto 47.2 ± 5.1 mL). However, therewas no difference in the percentage of available milk removed (range = 99.4% ± 15.1% to 70.6% ± 8.6%). The rate of milk removal differed between patterns at both the beginning (1 minute) and end (1.5 minutes) of the expression period (P< .05). Peak vacuum chosen differed between patterns (P= .0085) butwas not related to either the volume or percentage of available milk expressed. Breastfeeding characteristics did not differ between poor and successful expressers. These results showthat breast milk expression by an electric breast pump can be influenced by the vacuum pattern.
Key Words: breast milk expression electric breast pump
Journal of Human Lactation, Vol. 18, No. 4,
353-360 (2002) This article has been cited by other articles:
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