The Relationship Between Umbilical Cord ph and Feto-maternal Doppler Studies in Scheduled Nonlaboring Term Singleton Caesarean Deliveries

the investigators included in our study only singleton term (37 0/7 - 41 6/7 weeks of gestation) pregnancies delivered by a scheduled nonlaboring term singleton caesarean deliveries. This was an observational study carried out at a single university tertiary care center For every patient, an ultrasound examination was performed within one day of delivery and the fetal doppler indices were recorded. The umbilical venous pH were obtained immediately after delivery and before placental detachment with heparinized syringes The primary endpoints were CPR, umbilical (UA) and fetal MCA arteries indices. The second endpoints analysed when measurable were ductus venosus (DV) and uterine artery (Ut) pulsatility indices, all indices were examined using colour Doppler ultrasound according to a standard procedure and CPR was evaluated as the ratio between the MCA and UA pulsatility indices. The venous umbilical cord pH at birth was correlated with ultrasound doppler parameters, calculating the correlation coefficient r2 and P-value. Statistical significance was fixed at P\<0.05. the investigators performed a linear regression analysis to find the association between the different ultrasound indices and the venous pH.