Resumen

TAPIA CORREA, Roxana Magaly  y  COLLANTES CUBAS, Jorge Arturo. Effects of earlv or late clamping of the umbilical cord on hemoglobin in infants born vaginallv at 2 700 meters above sea level. Rev. peru. ginecol. obstet. [online]. 2015, vol.61, n.3, pp.237-240. ISSN 2304-5132.

Several studies have shown that late cord clamping in creases levels of hemoglobin in newborns. Objectives: To determine whether delayed umbilical cord clamping in term infants show higher hemoglobin levels than early clamping, investigation performed at 2700 m.a.s.l. Design: Prospective, randomized, double blind study. Setting: Gynecology and Obstetrics Department, Hospital Regional de Cajarnarca, Peru. Participants: Newborns and their moth­ ers. Methods: In january 2014, 100 pregnant women in labor with singleton pregnancies at term and without other risk factors were randomized to delayed clamping (when the umbilical cord stopped beats in 1-3 minutes) or early clamping (about 1 O seconds after birth). Time was measured starting when baby shoulders appeared. A blood sample from the right newborn's heel was obtained and placed in 2 capillaries, at birth and also at 6 hours of life; hemoglobin, hematocrit, and group and Rh factor were analyzed. Main outcome measures: Hemoglobin levels. Results: Ninety-one per cent of pregnant women did not have anemia and 9% had anemia; maternal blood group was 0+ in 86%; 94% of newborns weighed 2 501-3 999 g, Apgar >7 was found in all newborns. Late clamping was done in 52 infants and early clamping in 48. The umbilical cord stopped beating at 2.67+-0.28 minutes. In 100% of infants with early clamping hemoglobin value was <15 mg/dL, and in late clamping 71.1 % had hemoglobin 15.1­ 20.1 mg/dL and 28.9% over 20.1 mg/dL. There was no significant difference in newborn hemoglobin values whether the mother presented anemia or not. Conclusions: Late clamping resulted in better neonatal hemoglobin values. Average time for the umbilical cord stopping beats was 2.67 mino Maternal anemia did not affect neonatal hemoglobin at 2 700 m.a.s.l.

Palabras clave : Umbilical Cord; Umbilical Cord Blood; Fetal blood; Fetal Hemoglobin.

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