Fetal pulse oximetry and cesarean delivery

Area of Science:

• Obstetrics and Gynecology
• Perinatal Medicine
• Fetal Monitoring

Background:

• Electronic fetal monitoring is standard for assessing fetal well-being during labor.
• Fetal oxygen saturation monitoring is an adjunct tool that may impact clinical decisions.
• The potential benefits of real-time fetal oxygen saturation data on delivery outcomes are not well-established.

Purpose of the Study:

• To determine if knowledge of fetal oxygen saturation, via open fetal pulse oximetry, affects cesarean delivery rates or infant condition at birth compared to masked monitoring.

Main Methods:

• A randomized controlled trial involving 5341 nulliparous women at term in early labor.
• Participants were assigned to either "open" (values displayed) or "masked" (values hidden) fetal pulse oximetry groups.
• Labor complications, including nonreassuring fetal heart rate, were documented for analysis.

Main Results:

• No significant difference in overall cesarean delivery rates between the open (26.3%) and masked (27.5%) groups (P=0.31).
• Cesarean delivery rates for nonreassuring fetal heart rate and dystocia were similar in both groups.
• Infant condition at birth did not significantly differ between the open and masked fetal pulse oximetry groups.

Conclusions:

• Providing clinicians with fetal oxygen saturation data does not lead to a reduction in cesarean deliveries.
• Knowledge of fetal oxygen saturation is not associated with improved infant condition at birth.
• Fetal pulse oximetry, when used openly, does not offer significant advantages over masked monitoring in this population.