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Amnioinfusion for meconium-stained liquor in labour
G Justus Hofmeyr1, Hairong Xu, Ahizechukwu C Eke
1Department of Obstetrics and Gynaecology, East London Hospital Complex, University of the Witwatersrand, University of Fort Hare, Eastern Cape Department of Health, Frere and Cecilia Makiwane Hospitals, Private Bag X 9047, East London, Eastern Cape, South Africa, 5200.
Amnioinfusion may reduce risks for newborns exposed to meconium-stained amniotic fluid, particularly in settings with limited surveillance. However, benefits are not consistently observed in well-resourced environments.
Area of Science:
- Obstetrics and Gynecology
- Neonatal Medicine
- Evidence-Based Medicine
Background:
- Amnioinfusion is a procedure aimed at diluting meconium in amniotic fluid.
- The goal is to reduce the risk of meconium aspiration syndrome in newborns.
Purpose of the Study:
- To evaluate the impact of amnioinfusion for meconium-stained liquor on perinatal outcomes.
- To assess the effectiveness of amnioinfusion in different healthcare settings.
Main Methods:
- A systematic review and meta-analysis of randomized controlled trials.
- Searched the Cochrane Pregnancy and Childbirth Group's Trials Register.
- Included 14 studies involving 4435 women with moderate to thick meconium staining.
Main Results:
- In settings with limited surveillance, amnioinfusion reduced caesarean sections, meconium aspiration syndrome, perinatal mortality, and neonatal respiratory support.
- In settings with standard surveillance, no significant reduction in primary outcomes like meconium aspiration syndrome or perinatal death was observed.
- Sensitivity analysis excluding high-bias trials eliminated observed benefits in standard surveillance settings.
Conclusions:
- Amnioinfusion shows significant perinatal benefits primarily in resource-limited settings.
- Its effectiveness in standard surveillance settings is uncertain and may be masked by other interventions.
- Further research is needed to clarify the mechanism of benefit and assess rare maternal adverse effects.
