Umbilical Artery Lactate Levels of Normes Full-term Neonates by Vaginal Delivery Compare with Those of Cesarean Section

Objective:To analyse the difference of normal full-term neonatal umbilical artery lactate levels in the vaginal delivery and the cesarean section , and the correlation between the neonatal umbilical artery lactate levels of vaginal delivery and the lasting time of the second stage of labor. Methods:Normal neonatal umbilical artery lactate levels were measured in the vaginal delivery group (n=56) and the cesarean section group (n=62). The correlation between neonatal umbilical artery lactate levels in the vaginal delivery group (n=56) and the lasting time of the second stage of labor was analyzed. Results:Umbilical artery lactate levels of the vaginal delivery group were significantly higher than those of the cesarean section group (P0.01). But umbilical artery lactate levels in the vaginal delivery group with the second stage ≤45 min(n=10)were significantly lower than those of the cesarean section group(P0.05). There was no significant difference in lactate levels between the second stage of labor ≤1h (n=28) and the cesarean section group (P0.05). Umbilical artery lactate levels in the neonate with the second stage1h (n=28) were significantly higher than those of the cesarean section group (P0.05). There was a positive correlation between neonatal lactate levels of vaginal delivery and the lasting time of the second stage of labor (P0.01).Conclusions:There was no significant difference in umbilical artery lactate levels between the vaginal delivery with the second stage of labor1h and the cesarean section group. When the second stage of labor1h , the neonatal lactate levels were increased. So we should pay a attention to the prolonged second stage of labor, and treat it actively.