Seeking studies on milk expression – do you know of any?
I am undertaking a Cochrane Systematic Review of methods of milk expression for lactating women. The main objectives of this review are to assess acceptability, effectiveness, safety, effect on milk composition, bacterial contamination and cost implications, of a range of methods of milk expression including hand expression, manual, battery and electric pumps.
I am particularly looking for information to any studies that have not been published in major journals, for example, Masters or PhD studies, product trials, hospital studies to establish protocols or similar. Details of the types of studies I am looking for are below. I am not looking for studies that just describe the use of a method of milk expression.
Please share this request with anyone you think may be able to help. The review is on-going, however for inclusion in the main publication of the review, I would need to know about the study by April 2007.
Thank you
Genevieve Becker, IBCLC
2 Kylemore Park, Taylor's Hill
Galway, Ireland
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Tel: +353-91-527511
Fax: +353-91-528677
Review protocol published: Becker GE, Renfrew MJ. Methods of milk expression for lactating women. (Protocol) Cochrane Database of Systematic Reviews 2006, Issue 4. Art. No.: CD006170. DOI: 10.1002/14651858.CD006170. http://www.mrw.interscience.wiley.com/cochrane/clsysrev/articles/CD006170/frame.html
Criteria for considering studies for this review
Types of studies: All randomised or quasi-random controlled trials that compared one method or technique of milk expression or pumping with other(s). Scope of the review will be extended to include studies more than 28 days after birth. There will be no limitation of study by country of origin or language.
Types of participants: Women expressing or pumping milk for any reason by any method, who may or may not also be feeding a child at the breast. Health status of the child is not a defining criterion for inclusion or exclusion.
Types of interventions: Studies will be included if they provided information on hand expression or mechanical pumping specifically for the study, or provided hand expression or mechanical pumping equipment, or if the study required expression or pumping using a specific protocol.
Primary outcomes
Indicators of maternal satisfaction with method, including acceptability, comfort, ease of use, and achievement of the woman's goal for expressing or pumping.
Indicators of possible adverse outcomes for mother or infant as a result of pumping or expressing, including: contamination of milk, injury to mother's breast or other anatomy, reduction or cessation of pumping or expressing due to difficulties with pumping or expressing.
Secondary outcomes
Transfer to at-breast feeding if expressing preceded at-breast feeding.
Quantity of milk expressed.
Time taken to express milk.
Nutrient quality of expressed milk, for example fat, sodium, energy.
Maternal physiological effects of expressing - prolactin and other hormone levels.
Economic - cost of pump equipment, effect on hospital length of stay for infant, level of healthcare service usage to support expressing or pumping.
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