Oximetria fetal de pulso: relação entre a saturação de oxigênio do segundo período do parto e o pH da artéria umbilical ao nascimento

Edson Nunes De Morais

doi:10.1590/s0100-72031999000700003

Abstract

Purpose: to study the correlation between fetal oxygen saturation measured by pulse oximetry during second stage of labor and umbilical artery pH at birth. Patients and Methods: fetal oxygen saturation (FSpO2) was monitored by pulse oximetry during the second stage of labor in 64 singleton pregnancies at term, with vertex presentation. Umbilical blood was sampled immediately after delivery for subsequent measurement of venous and arterial blood gases and pH. All fetuses maintained FSpO2 ³30% through the first stage of labor, until the start of second stage. Results: the mean FSpO2 at the second stage of labor correlated significantly with umbilical artery pH at birth (n = 64, r = 0.79, p <0.001). There was no significant corre-lation between FSpO2 at the second stage of labor and umbilical artery oxygen saturation at birth. Conclusion: fetal oxygen saturation measured by pulse oximetry during second stage of labor has a good correlation with umbilical artery pH at birth.

Highlights

Purpose: to study the correlation between fetal oxygen saturation measured by pulse oximetry during second stage of labor and umbilical artery pH at birth
There was no significant correlation between FSpO2 at the second stage of labor and umbilical artery oxygen saturation at birth
Conclusion: fetal oxygen saturation measured by pulse oximetry during second stage of labor has a good correlation with umbilical artery pH at birth

Summary

Edson Nunes de Morais

Objetivo: estudar a correlação entre a saturação de oxigênio fetal medida pela oximetria de pulso durante o segundo período do parto e o pH da artéria umbilical ao nascimento. Não houve correlação significante entre a FSpO2 no segundo período do parto e a saturação de oxigênio do sangue da artéria umbilical ao nascimento. Conclusão: a saturação de oxigênio fetal medida pela oximetria de pulso durante o segundo período do trabalho de parto tem uma boa correlação com o pH da artéria umbilical ao nascimento. O presente estudo foi realizado com o objetivo de buscar uma possível correlação entre os valores da FSpO2, medidos por meio da oximetria fetal de Morais pulso no segundo período do parto, e o pH do sangue da artéria umbilical ao nascimento

Pacientes e Métodos d u

Oximetria fetal e pH umbilical

Findings

SUMMARY