alexa Delayed cord clamping and blood flow in the superior vena cava in preterm infants: an observational study.
Reproductive Medicine

Reproductive Medicine

Journal of Pregnancy and Child Health

Author(s): Meyer MP, Mildenhall L

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Abstract OBJECTIVE: To determine if timing of cord clamping affects blood flow in the upper body, as measured by flow in the superior vena cava (SVC). DESIGN: Observational study. SETTING: Neonatal Unit, Middlemore Hospital, Auckland, New Zealand. PATIENTS: 30 preterm infants <30 weeks' gestational age. INTERVENTION: Cord clamping was immediate in 17 infants and delayed by 30-45 s in 13. RESULTS: Infants in the two groups did not differ significantly in terms of gestational age, gender or use of antenatal steroids. Median flow in the SVC in the first 24 h was significantly higher in the group with delayed clamping (median 91 ml/kg/min; IQR 81-101) compared with 52 ml/kg/min (IQR 42-100) in the immediate clamping group (p=0.028). Fewer infants in the delayed group had low flow (1 compared with 9; p=0.017). All three infants with intraventricular haemorrhage (IVH) (of any grade) had low flow. CONCLUSIONS: Blood flow in the SVC was higher in infants where delayed cord clamping was performed. The relationship of IVH, low flow and timing of cord clamping requires further study. This article was published in Arch Dis Child Fetal Neonatal Ed and referenced in Journal of Pregnancy and Child Health

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