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Related Experiment Videos

Pathologic fetal acidemia.

K G Goldaber1, L C Gilstrap, K J Leveno

  • 1Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas.

Obstetrics and Gynecology
|December 1, 1991
PubMed
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A lower umbilical cord pH cutoff of less than 7.00 is more accurate for identifying severe fetal acidemia and associated neonatal risks, including death and seizures.

Area of Science:

  • Neonatal Medicine
  • Perinatal Research
  • Obstetrics

Background:

  • The threshold for defining pathologic fetal acidemia using umbilical artery pH is not well-established.
  • Traditionally, a pH cutoff of less than 7.20 has been utilized.
  • Accurate identification of fetal acidemia is crucial for neonatal outcomes.

Purpose of the Study:

  • To precisely define the umbilical artery pH cutoff for pathologic fetal acidemia.
  • To correlate specific pH ranges with neonatal morbidity and mortality.
  • To re-evaluate the clinical significance of traditionally used pH cutoffs.

Main Methods:

  • Analysis of 3506 term newborns with umbilical artery pH < 7.20.
  • Categorization of newborns into five distinct pH groups.

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  • Statistical comparison of neonatal outcomes (acidemia components, Apgar scores, seizures, mortality) across pH groups.

    • Main Results:

    • Newborns with pH < 7.00 exhibited a higher incidence of metabolic acidemia (66.7%) compared to other groups.
    • Significantly more infants in the pH < 7.00 group had low Apgar scores (P < .05).
    • Neonatal death (P = .03) and unexplained seizures (P = .01) were significantly more common in the pH < 7.00 group.

    Conclusions:

    • A more realistic and clinically significant pH cutoff for defining pathologic fetal acidemia is less than 7.00.
    • The traditional cutoff of < 7.20 may not adequately identify neonates at high risk.
    • pH < 7.00 is strongly associated with severe neonatal complications and adverse outcomes.