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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

Summary

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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.

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.

Related Experiment Videos

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.