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- W2896750598 abstract "To construct centile nomograms for aortic and pulmonary artery diameters in the second and early third trimesters. The patients recruited all fulfilled the following criteria: (1) known last menstrual period with regular cycles, (2) singleton, (3) no fetal anomalies, (4) no pregnancy complications, (5) live birth at term, (5) birthweight above the 5th and below the 95th centile for gestation. Pulmonary artery and aortic diameters were measured by transvaginal ultrasound on long-axis views of the great vessels. Measurements of the great vessels were taken at the level just above the aortic and pulmonary valves during ventricular systole. The relationship between the mean of each measurement and gestational age was modelled by a fractional polynomial regression. The procedure for selecting the best fitting model was based on minimising the deviance as in the appendix of Royston and Wright (1998). Similarly a standard deviation (SD) curve for each measurement was estimated by regressing the ‘scaled absolute residuals’ on gestational age, again using fractional polynomial. The 5th and 95th percentile of the measurement at each gestational age is given by mean ± 1.645 SD. All analyses and graphics were made using software STATA version 13. 150 cases were recruited. Diameters range from 2.1mm (aortic) and 2.5mm (pulmonary artery) at 18 weeks of gestation to 4.3mm (aortic) and 5.9mm (pulmonary artery) at 31 weeks of gestation. Reference ranges of aortic and pulmonary artery diameters were documented." @default.
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- W2896750598 date "2018-10-01" @default.
- W2896750598 modified "2023-09-22" @default.
- W2896750598 title "EP10.21: Fetal aortic and pulmonary artery diameters in normal pregnancy" @default.
- W2896750598 doi "https://doi.org/10.1002/uog.19950" @default.
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