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Strong Jr., T.H., Jarles, D.L., Vega, J.S. and Feldman, D.B. (1994) The umbilical coiling index. American Journal of Obstetrics & Gynecology, 170, 29-32. http://dx.doi.org/10.1016/S0002-9378(94)70378-7

has been cited by the following article:

• TITLE: Periarterial stem villous edema is associated with hypercoiled umbilical cord and stem obliterative endarteritis

  AUTHORS: Jerzy Stanek

  KEYWORDS: Obliterative Endarteritis; Periarterial Stem Edema; Placenta; Umbilical Cord Coiling

  JOURNAL NAME: Open Journal of Obstetrics and Gynecology, Vol.3 No.9A, November 4, 2013

  ABSTRACT: To assess clinicopathologic correlations of a novel placental lesion featuring a distinct ring-like periarterial edema of stem villi (PASE). A retrospective case-control statistical comparison (Yates χ2 or analysis of variance) of 30 clinical and 41 placental features of 100 consecutive placentas with PASE and 100 gestational age-matched cases without PASE, extracted from 2403 placentas from high-risk pregnancies signed out by the author since year 2006. The PASE was seen in 4.2% of placentas, average gestational age 35.9 weeks (range, 24 - 42 weeks). Frequencies of stem obliterative endarteritis and hypercoiled umbilical cord (coiling index > 0.3) were 23% vs 5% (p = 0.005), and 20% vs 9% (p = 0.04) in the study group and comparative group, respectively. There were no statistically significant differences (p > 0.05) between the groups in clinical or other placental variables. The PASE may be linked to chronically abnormal blood flow in umbilical cord arteries and their stem branches and may be a histological placental sign of non-obliterative umbilical cord compromise.