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The umbilical coiling index

T H Strong1, D L Jarles, J S Vega

  • 1Phoenix Perinatal Associates, AZ.

American Journal of Obstetrics and Gynecology
|January 1, 1994
PubMed
Summary

The umbilical coiling index objectively quantifies umbilical vascular coiling. Low or high coiling is linked to adverse pregnancy outcomes like fetal distress and abnormal karyotypes.

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Area of Science:

  • Perinatology
  • Fetal Medicine
  • Obstetrics

Background:

  • Umbilical cord morphology is crucial for fetal well-being.
  • Quantifying umbilical vascular coiling has been challenging.

Purpose of the Study:

  • To objectively quantitate umbilical vascular coiling using a novel index.
  • To explore the association between umbilical coiling and pregnancy outcomes.

Main Methods:

  • Prospective study of 100 neonates' umbilical cords.
  • Calculated umbilical coiling index (UCI) as coils per centimeter.
  • Evaluated obstetric history and fetal monitoring data.

Main Results:

  • Mean UCI was 0.21 coils/cm, normally distributed.
  • Low UCI (<10th percentile) correlated with karyotypic abnormalities, meconium staining, and operative intervention for fetal distress.
  • Both low and high UCI (>90th percentile) were associated with severe variable fetal heart rate decelerations.

Conclusions:

  • The umbilical coiling index provides objective quantification of umbilical vascular coiling.
  • Abnormal coiling patterns may indicate increased risk for adverse pregnancy outcomes.
  • UCI may serve as a valuable clinical and research tool.

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