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Type: Artigo de periódico
Title: Sonographic Measurement Of The Umbilical Cord Area And The Diameters Of Its Vessels During Pregnancy.
Author: Barbieri, C
Cecatti, J G
Surita, F G
Marussi, E F
Costa, J V
Abstract: The objective was to determine the cross-sectional area of the umbilical cord, its diameter and the diameter of its vessels to establish a reference curve for these parameters during pregnancy, through a prospective cross-sectional study, including 2,310 low-risk pregnancies between 12 and 40 weeks' gestation. Means and standard deviations (SDs), plus the 10th, 50th and 90th percentiles for each measurement were calculated using polynomial regression analysis. Mann-Whitney, Kruskal-Wallis and Wilcoxon tests were used for statistical analysis. These parameters increased significantly with gestational age. The area of the cord also varied significantly with parity. Their new reference curves for low risk pregnancies were calculated using polynomial regression, and an almost linear increase in values was found up to 32 weeks of pregnancy, tending to stabilise from then onwards. The regression equation of the umbilical cord area according to gestational age (GA) was: -1.417 + 0.3026*GA-0.008*GA(2) + 0.000007*GA(3) and the degree of adjustment (R(2)) was 0.89.
Subject: Adult
Cross-sectional Studies
Gestational Age
Prospective Studies
Reference Standards
Reference Values
Regression Analysis
Ultrasonography, Prenatal
Umbilical Arteries
Umbilical Cord
Umbilical Veins
Citation: Journal Of Obstetrics And Gynaecology : The Journal Of The Institute Of Obstetrics And Gynaecology. v. 32, n. 3, p. 230-6, 2012-Apr.
Rights: fechado
Identifier DOI: 10.3109/01443615.2011.647129
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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