Int érêt et faisabilité du Doppler cérébral en cours de travail pour prédire une acidose néonatale

Conclusions Le Doppler cérébral est réalisable en cours de travail mais n’est donc pas un bon examen de seconde ligne pour l’évaluation de l’acidose fœtale en cours de travail. Objectives To evaluate feasibility and interest of fetal cerebral Doppler during labor and the link with fetal pH to predict perinatal fetal asphyxia. Methods Our prospective study in a university perinatal center, included patients during labor. There were no risk factors during pregnancy and patients were included after 37 weeks of pregnancy. For each patient an ultrasound with cerebral Doppler was done concomitant to a fetal scalp blood sample. We collected maternal and fetal characteristics as well as cervix dilatation, fetal heart rate analysis and fetal presentation. Results Among 49 patients included over a period of 4 months, cerebral Doppler failed in 7 cases (11%). Majority of failure occurred at 10cm of dilatation (P =0.007, OR=14.1 [1.483; 709.1275]). Others factors like: maternal age, body mass index, parity, history of C-Section were not associated with higher rate of failure. We did not found either significant correlation between cerebral fetal Doppler and pH on fetal scalp blood sample (r =0.15) nor pH at cord blood sample (r =0.13). No threshold of cerebral Doppler is significant for fetal asphyxia prediction. Conclusion Fetal cerebral Doppler is feasible during labor with a low rate of failure but not a good exam to predict fetal acidosis and asphyxia.
Source: Gynecologie Obstetrique and Fertilite - Category: OBGYN Source Type: research