alexa The effect of Leboyer delivery on blood viscosity and other hemorheologic parameters in term neonates.
Pediatrics

Pediatrics

Journal of Neonatal Biology

Author(s): Nelle M, Zilow EP, Kraus M, Bastert G, Linderkamp O

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Abstract OBJECTIVE: This study was done to compare postnatal alterations in blood viscosity, hematocrit value, plasma viscosity, red blood cell aggregation, and red blood cell deformability in term neonates undergoing both early umbilical cord clamping and delivery according to the Leboyer method. STUDY DESIGN: The umbilical cords of 15 healthy, term infants were clamped within 10 seconds of birth (early cord clamping), and 15 infants delivered according to the Leboyer method were placed on the mother's abdomen, and the umbilical cords were clamped 3 minutes after birth. Hemorheologic parameters were studied in umbilical cord blood at 2 hours, 24 hours, and 5 days from the time of delivery. RESULTS: The residual fetal placental blood volume decreased from 45 +/- 8 ml/kg (x +/- SD) after early cord clamping to 25 +/- 5 ml/kg after delivery by the Leboyer method. After Leboyer-method delivery, the hematocrit value rose from 48\% +/- 5\% at birth to 58\% +/- 6\% 2 hours after delivery, 56\% +/- 7\% at 24 hours, and 54\% +/- 8\% after 5 days. Blood viscosity in the Leboyer-method group increased by 32\% within the first 2 hours but did not change significantly during the following 5 days. Plasma viscosity, red blood cell aggregation, and red blood cell deformability were not affected by the mode of cord clamping. CONCLUSIONS: Delivery by the Leboyer method leads to a significant increase in blood viscosity as a result of increasing hematocrit value, whereas other hemorheologic parameters are similar to those of infants with early cord clamping.
This article was published in Am J Obstet Gynecol and referenced in Journal of Neonatal Biology

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