Document Detail

The use of ultrasound to characterize milk ejection in women using an electric breast pump.
MedLine Citation:
PMID:  16280558     Owner:  NLM     Status:  MEDLINE    
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.
Donna T Ramsay; Leon R Mitoulas; Jacqueline C Kent; Michael Larsson; Peter E Hartmann
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of human lactation : official journal of International Lactation Consultant Association     Volume:  21     ISSN:  0890-3344     ISO Abbreviation:  J Hum Lact     Publication Date:  2005 Nov 
Date Detail:
Created Date:  2005-11-10     Completed Date:  2006-01-31     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8709498     Medline TA:  J Hum Lact     Country:  United States    
Other Details:
Languages:  eng     Pagination:  421-8     Citation Subset:  N    
Biochemistry and Molecular Biology, School of Biomedical and Chemical Sciences, University of Western Australia, Crawley, Australia.
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MeSH Terms
Breast / physiology*,  secretion
Breast Feeding
Lactation / physiology*
Milk Ejection / physiology*
Milk, Human
Suction / instrumentation*,  methods
Time Factors
Ultrasonography, Mammary / methods
Comment In:
J Hum Lact. 2006 Nov;22(4):388; author reply 388-9   [PMID:  17086637 ]
J Hum Lact. 2006 Nov;22(4):388-9

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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