A 25-year-old in the first stage of labor receives a continuous lumbar epidural block when the cervix is 6 cm dilated. After administration, which assessment would be most important?

• A. Maternal pulse rate.
• B. Rectal pressure.
• C. Uterine contractions pattern and intensity.
• D. Fetal heart rate.

Answer: (D)

The key idea is fetal well-being after neuraxial analgesia during labor. A continuous lumbar epidural block can cause maternal sympathetic blockade, which may lead to lowered maternal blood pressure and reduced uteroplacental perfusion. If placental oxygen delivery to the fetus decreases, fetal distress can occur, and the most immediate way to detect that is by monitoring the fetal heart rate. Continuous fetal heart rate assessment provides direct information about how the fetus is tolerating labor and any potential hypoxia needs prompt action.

Maternal pulse can reflect her hemodynamic status but isn’t as direct a measure of fetal wellbeing. Uterine contraction pattern and intensity are important for labor progression, but they don’t tell you how well the fetus is faring after the analgesia. Rectal pressure isn’t relevant to fetal status. So, monitoring fetal heart rate is the most important assessment after administering an epidural in this scenario.