Effects Of Different Time Of The Cord Clamping In Vaginal Birth Preterm Infants

Objective: To study the effects of different time of the cord clamping in vaginal birth preterm infants of the third birth process.To evaluate the effects of different time delay the cord clamping to the preterm infants, and to provide the basis for the best time to the cord clamping in vaginal birth preterm infantsMethods: The study was from 2013 October to 2015 June in Nanjing Gaochun district hospital. The preterm infants after vaginal delivery and their mothers were selected for the object. All 199 cases were established inclusion criteria consistent, in accordance with the delivery order number, according to the principle of random, all cases were divided into 4 groups: normal control group(a), cut the umbilical cord, and time for delivery after 10 seconds, delayed omphalotomy 30 seconds group(b), delayed omphalotomy 60 seconds group(c) and delayed omphalotomy 120 seconds group(d). According to the different cord clamping, and time of observation, observation of premature infants born after 24 hours(h) and a week of hemoglobin(Hb), hematocrit(HCT), bilirubin transcutaneous(TCB), as well as the cerebral ventricles hemorrhage(hemorrhage intraventricular, IVH), anemia rate, blood transfusion rate and other indicators.Results: Compared with the normal control group,the Hb value(24h, 1W) and Hct values of the three groups which were delayed cord clamping of preterm infants were significantly increased( P < 0.05), it suggested that the difference was statistically significant; and 24 h delayed cord clamping of three groups of pairwise comparison, did not find significant difference(P > 0.05); 1 week, delayed cord clamping 120 seconds group and delayed for 30 seconds and 60 seconds group compared to that of Hb values and Hct values were significantly higher( P < 0.05), prompt group differences had statistical significance; delayed cord clamping of preterm infants in three groups the transfusion rate and rate of anemia and normal control group were significantly lower( P < 0.05), Compared with no significant difference(P > 0.05). Among the four groups in the peak of transcutaneous bilirubin(peak transcutaneous bilirubin peak TCB), intraventricular hemorrhage(intraventricular hemorrhage, IVH) and hyperbilirubinemia induced, phototherapy days occurred rate had no significant difference(P > 0.05).Conclusion: Compared with the early cord clamping(ECC),the delayed cord clamping(DCC) did not increase the incidence of intraventricular hemorrhage(IVH), the peak of transcutaneous bilirubin(peak TCB) and hyperbilirubinemia and phototherapy days of preterm infants. the delayed cord clamping(DCC) could significantly improve the hemoglobin(Hb) and hematocrit(HCT) in preterm infants after 24 hours or a week and reduce the rate of anaemia and blood transfusion.At the parent level,the preterm infants with vaginal delivery which were delayed cord clamping 30 seconds to 120 seconds were proved safe. For vaginal delivery of preterm infants,the cord clamping time that controlled in 30 seconds were the best, but in preterm infants of basic conditions of the body in good condition, the cord clamping time could be delayed to 120 seconds, which had positive significance to the improvement of the preterm infants.