What is a fetal scalp electrode during labor?

What does the evidence say about fetal scalp electrode?

1. An internal electrode records the fetal heart rate rather than the strength of contractions. It may be proposed when an abdominal sensor loses the heartbeat signal. Ask whether the concern is poor recording quality or a heart-rate pattern that needs closer assessment, because those explanations are different. 1
2. NICE guidance includes a scalp electrode among ways to improve a poor-quality tracing and stresses checking the maternal pulse as well. Even internal monitoring requires correct interpretation. It does not remove the need to distinguish maternal and fetal heart rates or to consider the complete labor picture. 2
3. The clinician needs access through an open cervix and must be able to identify the presenting head. The electrode attaches to the scalp, creating a small break in skin. Infection and local injury are part of the risk discussion, along with conditions that might make placement inappropriate. 3
4. An intact amniotic sac blocks access for the electrode. If breaking the water is proposed to enable placement, discuss the purpose and risks of that procedure too. A need for a clearer tracing does not make membrane rupture a detail that should go unexplained. 4
5. A concerning heart-rate pattern can prompt position changes, reassessment, changes to labor medicines, or delivery, depending on the situation. Attaching an electrode does not itself settle which response is necessary. Ask what the clearer recording shows and whether the plan has changed. 1

How can you prepare for a change in fetal monitoring?

• First trimester. Keep relevant infection history and medical records available to your prenatal team.
• Second trimester. Discuss what could make a change in labor monitoring useful.
• Third trimester. Ask why an electrode is proposed, whether membranes are already ruptured, and how the result will change care.

Questions for your birth team