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| Analysis of the differential blood gas of the umbilical artery of the twin of pregnant women during the trial vaginal delivery and its correlative factors |
| Women and Children's Medical Center of Guangzhou Medical University, Guangzhou, Guangdong Province, 510602 |
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Abstract To explore the differential blood gas of the umbilical artery of the twin of pregnant women during the trial vaginal delivery, and to study its correlative factors. Methods: A retrospective analysis was conducted on the clinical data of 36 pregnant women with twin pregnancies who had been trial vaginal delivery from December 2021 to January 2024. The clinical characteristics, the umbilical artery blood gas results and the neonatal outcomes of the women were analyzed, and the relevant factors of the differences of the umbilical artery blood gas indicators between the two fetuses were explored. Results: The results of umbilical artery blood gas analysis indicated that the values of pH (7.22±0.10) and alkaline residue (4.48±3.29 mmol/L) of umbilical artery blood gas of the second fetus were significantly lower than those (7.29±0.06 and 3.10±3.27 mmol/L) of the first fetus, but the lactate level (3.68±1.52 mmol/L) of umbilical artery blood of the second fetus was significantly higher than that (3.00±1.15 mmol/L) of the first fetus. The differences of the blood gas indexes of the two fetuses had no correlation with the maternal age, the fetal position before delivery, the chorionic nature, the gestational weeks at delivery, the mode of initiation of labor, the mode of induction, the oxytocin used and the fetal heart rate monitoring during labor, the delivery outcomes, the fetal position at delivery, the whether the neonates transferred to hospital, but which had moderately correlation with the primiparas rate and the BMI of the women, and the neonatal Apgar score at 1min and 5min after birth. Conclusion: This study suggests that during the trial vaginal delivery of the pregnant women with twins, the second fetus of the women has the relatively poor umbilical artery blood gas status, which indicating that the second fetus has the increased risk of acute hypoxia during labor. However, the pregnant women with twins are given standardized labor management, which do not increase their adverse neonatal outcomes in clinical practice.
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