Effects of delayed cord clamping in very-low-birth-weight infants
Objective: Delayed cord clamping (DCC) may be beneficial in very-preterm and very-low-birth-weight infants. Study Design: This study was a randomized unmasked controlled trial. It was performed at three centers of the NICHD (National Institute of Child Health and Human Development) Neonatal Research Network. DCC in very-preterm and very-low-birth-weight infants will result in an increase in hematocrit levels at 4 h of age. Infants with a gestational age of 24 to 28 weeks were randomized to either early cord clamping (< 10 s) or DCC (30 to 45 s). The primary outcome was venous hematocrit at 4 h of age. Secondary outcomes included delivery room management, selected neonatal morbidities and the need for blood transfusion during the infants' hospital stay. Result: A total of 33 infants were randomized: 17 to the immediate cord clamping group (cord clamped at 7.9 +/- 5.2 s, mean +/- s.d.) and 16 to the DCC (cord clamped at 35.2 +/- 10.1 s) group. Hematocrit was higher in the DCC group (45 +/- 8% vs 40 +/- 5%, P < 0.05). The frequency of events during delivery room resuscitation was almost identical between the two groups. There was no difference in the hourly mean arterial blood pressure during the first 12 h of life; there was a trend in the difference in the incidence of selected neonatal morbidities, hematocrit at 2, 4 and 6 weeks, as well as the need for transfusion, but none of the differences was statistically significant. Conclusion: A higher hematocrit is achieved by DCC in very-low-birthweight infants, suggesting effective placental transfusion. Journal of Perinatology (2011) 31, S68-S71; doi: 10.1038/jp.2010.186
Eunice Kennedy Shriver National Institute of Child (2011). Effects of delayed cord clamping in very-low-birth-weight infants. Journal of Perinatology, 31(Suppl. 1), S68-S71.