Amnioinfusion for potential or suspected umbilical cord compression in labour

Area of Science:

• Obstetrics and Gynecology
• Maternal-Fetal Medicine
• Neonatal Care

Background:

• Amnioinfusion involves infusing fluid into the uterine cavity to prevent or alleviate umbilical cord compression during labor.
• Umbilical cord compression poses risks to maternal and perinatal well-being.

Purpose of the Study:

• To evaluate the impact of amnioinfusion on maternal and perinatal outcomes in cases of potential or suspected umbilical cord compression.
• To synthesize evidence from randomized controlled trials on amnioinfusion efficacy.

Main Methods:

• Systematic review and meta-analysis of randomized controlled trials.
• Searched the Cochrane Pregnancy and Childbirth Group's Trials Register up to October 2011.
• Included 19 studies comparing amnioinfusion with no amnioinfusion.

Main Results:

• Amnioinfusion significantly reduced cesarean sections (RR 0.62), fetal heart rate (FHR) decelerations (RR 0.53), and low Apgar scores (RR 0.47).
• It also decreased meconium below vocal cords (RR 0.53), postpartum endometritis (RR 0.45), and prolonged maternal hospital stay (RR 0.45).
• Increased mean cord umbilical artery pH (MD 0.03) and a trend towards fewer neonates with low cord arterial pH were observed.

Conclusions:

• Amnioinfusion offers considerable benefits, reducing FHR decelerations, improving neonatal outcomes, and lowering C-section rates.
• Methodological limitations and small trial sizes necessitate further research on rare adverse effects and long-term outcomes.
• Future trials should investigate amnioinfusion in specific clinical scenarios like FHR decelerations or oligohydramnios.