Estado ácido-base en recién nacidos de embarazo con oligohidramnios espontáneo / Acid-base status in newborns from isolated oligohidramnios pregnancies

RESUMEN

Objetivo: Relacionar el oligohidramnios aislado con el estado ácido-base del neonato. Materiales y métodos: Se formaron dos grupos, uno de pacientes con oligohidramnios y otro control normal. Se tomó muestra de sangre de la vena umbilical al momento del nacimiento para determinar gases sanguíneos, hemoglobina y hematocrito. Resultados: Los valores promedios al nacer entre casos y controles del pH fue de 7.25±0.07 y de 7.26±0.03, respectivamente; de pCO2 de 50.21±12.1 y 45.63±6.32; de pO2 de 32.60±20.90 y 20.13±8.87; y el HCO3 de 21.34±2.86 y 20.30±2.85. Conclusiones: No hubo diferencias significativas en los valores promedios de pH en sangre del cordón umbilical en embarazos complicados con oligohidramnios; se observó un leve incremento de la pCO2 y compensación con elevación del bicarbonato y excesos de bases. No se demostró una relación directa de oligohidramnios aislado y pobres resultados perinatales.

ABSTRACT

Objective: To evaluate the relationship of isolated oligohidramnios with the acid-base state of the newborn. Materials and methods: Two groups were formed, one with patients with oligohydramnios and a control group. A blood sample was taken from the umbilical vein at the moment of the birth to determine sanguine gases, hemoglobin and hematocrit. Results: Mean values of the pH at birth were of 7.245±0.074 and of 7.256 ±0.030. The pCO2 had a value of 50.213±12.05 and in control group was 45.626±6.324. The pO2 was of 32.60±20.90 and in the group control was of 20.133±8.871. The HCO3 had a mean value in the group problem of 21.34±2.86, in the group control were of 20.30±2.85. Conclusions: There were not significant differences in the pH mean values in blood of the umbilical cord in complicated pregnancies with oligohydramnios; a light pCO2 increment and compensation with elevation of the bicarbonate and excesses of bases were observed. It was not demonstrated a direct relationship of isolated oligohidramnios and adverse perinatal outcomes.