Valor de la pulsioximetría fetal en la obstetricia actual

Abstract

Objetive To analyze the validity of the applied pulse oximetry to 49 delivery that presented nonreassuring a cardiotocography pattern. Subjects and methods We studied age, parity, weeks of gestation, beginning of the in labor, expansion at the moment for applying fetal pulse oximetry, hours of positioning of the fetal pulse oximetry, pSO 2F, meconium amniotic fluid, conclusion of the delivery, pH of cord, test of Apgar to the birth, newborn weight, and sex. We used statistical program SPSS version 10/0 for the collection of data. In the statistical analysis averages and standard deviations were used. Predictive sensitivity, specificity, and values for the validity of the test. It was used the test of the χ 2 for qualitative variables and the Student t for quantitative variables. The meaning level was considered in 0.05. Results When relating the pSO 2F to pH arterial of cord to the birth we obtain a sensitivity of 40%, specificity of 76.5%, positive predictive value of 42.9%, and negative predictive value of 74,6%. When we associated pSO 2F to other variables we observed as the delivery induced as opposed to the spontaneous one is a factor of risk for inferior levels to 30% of pSO 2F, liquid amniotic clear versus dyed liquid, pregnancy chronological prolonged in front pregnancy nonprolonged, conclusion of the delivery by means of caesarean versus vaginal, primiparous women as opposed to multiparous women, duration of pulse oximetry more than one hour as opposed to smaller duration of one hour. Conclusions The fetal pulse oximetry offers a poor sensitivity with an to accept specificity, therefore the use of this method does not have to replace the conventional techniques of fetal monitoring but to complement them.