| Soft versus rigid vacuum extractor cups for assisted vaginal delivery. | |
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MedLine Citation:
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PMID: 10796203 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: The original cups used for vacuum extraction delivery of the fetus were rigid metal cups. Subsequently, soft cups of flexible materials such as silicone rubber or plastic were introduced. Soft cups are thought to have a poorer success rate than metal cups. However they are also thought to be less likely to be associated with scalp trauma and less likely to injure the mother. OBJECTIVES: The objective of this review was to assess the effects of soft versus rigid vacuum extractor cups on perineal injury, fetal scalp injury and success rate. SEARCH STRATEGY: We searched the Cochrane Pregnancy and Childbirth Group trials register and the Cochrane Controlled Trials Register. Date of last search: February 2000. SELECTION CRITERIA: Acceptably controlled comparisons of soft versus rigid vacuum extractor cups. DATA COLLECTION AND ANALYSIS: Two reviewers assessed trial quality and extracted data. Study authors were contacted for additional information. MAIN RESULTS: Nine trials involving 1375 women were included. The trials were of average quality. Soft cups are significantly more likely to fail to achieve vaginal delivery (odds ratio 1.65, 95% confidence interval 1.19 to 2.29). However, they were associated with less scalp injury (odds ratio 0.45, 95% confidence interval 0.15 to 0.60). There was no difference between the two groups in terms of maternal injury. REVIEWER'S CONCLUSIONS: Metal cups appear to be more suitable for 'occipito-posterior', transverse and difficult 'occipito-anterior' position deliveries. The soft cups seem to be appropriate for straightforward deliveries. |
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Authors:
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R Johanson; V Menon |
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Publication Detail:
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Type: Journal Article; Review |
Journal Detail:
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Title: Cochrane database of systematic reviews (Online) Volume: - ISSN: 1469-493X ISO Abbreviation: Cochrane Database Syst Rev Publication Date: 2000 |
Date Detail:
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Created Date: 2000-07-06 Completed Date: 2000-07-06 Revised Date: 2010-11-26 |
Medline Journal Info:
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Nlm Unique ID: 100909747 Medline TA: Cochrane Database Syst Rev Country: ENGLAND |
Other Details:
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Languages: eng Pagination: CD000446 Citation Subset: IM |
Affiliation:
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Academic Department of Obstetrics and Gynaecology, North Staffordshire Hospital NHS Trust, Maternity Hospital, Newcastle Road, Stoke-on-Trent, Staffordshire, UK, ST4 6QG. rbj@kogs.demon.co.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Female Humans Pregnancy Vacuum Extraction, Obstetrical / instrumentation* |
| Comments/Corrections | |
Update In:
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Cochrane Database Syst Rev. 2010;11:CD000446
[PMID:
21069666
]
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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