Correlation of neonatal acid-base status and abnormal fetal heart rate patterns with regard to phase of labor

Amaç

To determine the neonatal acid-base status in patients with abnormal fetal heart rate (FHR) tracing patterns in lahor.

Yöntem

A prospeclive observational study was conducted with sevenly pregnant women in labor at term with pathologic FHR patterns. Neonatal outcomes were compared in parturient whose FHR patterns were abnormal during the first stage of active labor with parturient who demonstrated abnormal FHR pattern in latent phase. Tracings were interpreted with the use of the National Institute of Child Health and Human Development FHR monitor guidelines. Fetal acidosis was defined as pH values <7.20.

Bulgular The rate of fetal acidosis was 41%. Abnormal FHR patterns in latent phase of labor was statistically significantly associated with fetal acidosis when compared with abnormal FHR tracings present in first stage of labor (p=0.004). The rate of fetal acidosis in patients with late and variable decelerations were similar regarding to the phases of labor. However, early decelerations detected in latent phase of labor was associated with 63% fetal acidosis while only 5% of the newborns with early decelerations in the first stage of labor had fetal acidosis.

Sonuç

Prediction and diagnosis with intervention and delivery could prevent the progression of asphyxia so, obstetricians should bear in mind that, abnormal FHR patterns in the latent phase of labor is alerting for fetal asphyxia.

Anahtar Kelimeler

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