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Barry S Schifrin1, Brian J Koos2,3, Wayne R Cohen4

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Summary

Electronic fetal monitoring (EFM) identifies fetal neurological integrity, not just acidosis. Properly interpreted, EFM patterns can signal injury and guide preventive neuroprotection strategies for newborns.

Keywords:
cardiotocographyexcessive uterine activityfetal compensatory responsesfetal hypoxia-ischemiafetal monitoringfetal neurological injury

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Area of Science:

  • Obstetrics and Gynecology
  • Neonatal Neurology
  • Fetal Medicine

Background:

  • Electronic fetal monitoring (EFM) was introduced in 1970 to reduce neonatal morbidity and mortality by detecting fetal acid-base balance issues.
  • Despite its introduction, clinical trials have not consistently shown improved outcomes, yet EFM has increased operative deliveries.

Purpose of the Study:

  • To review limitations of current FHR pattern classifications and management guidelines.
  • To argue for a shift in focus from acidosis detection to understanding FHR patterns as biomarkers of neurological injury and integrity.
  • To highlight EFM's potential in guiding preventive measures and neuroprotection decisions.

Main Methods:

  • Review of existing literature on electronic fetal monitoring (EFM) and fetal heart rate (FHR) pattern analysis.
  • Critical analysis of current classification systems and management guidelines for FHR patterns.
  • Discussion of the pathophysiology of FHR patterns and their relationship to fetal neurological injury.

Main Results:

  • Current EFM classifications and guidelines focus excessively on fetal acidosis/hypoxia.
  • EFM patterns, when interpreted clinically, reliably indicate fetal neurological integrity and serve as biomarkers for neurological injury.
  • EFM patterns offer insights into hypoxic/ischemic threats and their evolution.

Conclusions:

  • EFM patterns are valuable indicators of fetal neurological status, distinct from acidosis prediction.
  • Proper interpretation of EFM in clinical context can identify fetal neurological integrity and injury.
  • EFM has potential to guide preventive strategies, reduce unnecessary interventions, and inform neuroprotection decisions.