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Gross Umbilical Cord Complications are Associated with Placental Lesions of Circulatory Stasis and Fetal Hypoxia
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Gross Umbilical Cord Complications are Associated with Placental Lesions of Circulatory Stasis and Fetal Hypoxia
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Journal Article
Gross Umbilical Cord Complications are Associated with Placental Lesions of Circulatory Stasis and Fetal Hypoxia
2012
Overview
Umbilical cord complications (UCC), such as true knots (TK), velamentous (VEL) insertion, marginal umbilical cord (MUC) insertion, umbilical cord entanglement (UCE) (both nuchal and non-nuchal), excessively long umbilical cord (ELUC), and excessively twisted umbilical cord (ETUC), can lead to decreased UC blood flow and have been associated with adverse fetal outcome and intrauterine fetal demise (IUFD). Few large series exist that correlate UCC with specific pathologic findings of the placenta. We present the largest series of UCC at this time. Eight hundred forty-one 3rd-trimester placentas with UCC were identified, as well as 858 randomly selected gestational age–matched placentas with grossly unremarkable UC. Lesions associated with circulatory stasis and thrombosis, including villous capillary congestion (VC), umbilical vessel distension (UVD), chorionic plate vessel distension (CPD), umbilical vessel thrombosis (UVT), fetal vascular thrombosis (FVT), intimal fibrin cushions (IFC), and avascular villi (AV), were noted, as well as other pathologic lesions. Data were analyzed by analysis of variance and Fisher exact tests, with P < 0.05 statistically significant. Umbilical cord complications as a group was associated with a significant increase in placental circulatory stasis lesions. Lesions associated with hypoxia, namely nucleated red blood cells and chorangiosis, were also increased. Finally, the presence of any UCC was significantly associated with IUFD. We also found that multiple UCC are associated with nonreassuring fetal heart rate and chorangiosis but that the presence of a single UCC was not. This indicates that UCC may lead to intrauterine hypoxia and subsequent adverse fetal outcome and that multiple UCC may be cumulative in effect.
Publisher
SAGE Publications,SAGE PUBLICATIONS, INC
