Influence of different time of clamping umbilical cord on premature infant with vaginal delivery

Objective:To investigate the effects of different time of clamping umbilical cord on premature infant with vaginal delivery.Methods:One hundred and twenty premature infants with vaginal delivery and puerperas were investigated.One hundred and twenty puerperas were randomly divided into group A,B,C and D according to the random number table method(30 cases each group).The umbilical cord in group A,B,C and D were clamped after 0,30,60 and 90 seconds of delivery,respectively.The basic data of newborns and puerperas were collected,and the hemoglobin(Hb) level of newborn,red blood cells deposited(HCT) value,incidence of anemia,blood transfusion rate,transcutaneous bilirubin peak value,phototherapy time,incidence of high bilirubin hematic disease and incidence of intracerebral haemorrhage were recorded in all groups.Results:The 24 h Hb level and HCT value in group B,C and D were higher than those in group A(P<0.05),and the differences of those between group B,C and D were not statistically significant(P>0.05).The Hb level and HCT value in newborns of group B,C and D after 1 week of birth were higher than those in group A(P<0.01),which in group D was higher than that in group B and C(P< 0.01),and the difference of which between group B and group C was not statistically significant(P>0.05).The incidence rates of anemia and blood transfusion in premature infants of group B,C and D were lower than those in group A(P<0.05),and the differences of which between group B,group C and group D were not statistically significant(P>0.05).The differences of the transcutaneous bilirubin peak value,phototherapy time,incidence of high bilirubin hematic disease and incidence of intracerebral haemorrhage between four groups were not statistically significant(P>0.05).Conclusions:The clamping umbilical cord of premature infant with vaginal delivery after 30 to 90 seconds of delivery can improve the neonatal blood supply,reduce the incidence of anemia and blood transfusion rate,and do not increase the risk of bilirubin increasing and phototherapy.The clamping umbilical cord of premature infants after 90 seconds of delivery can effectively improve their prognosis.