Ruano Rodrigo, de Fátima Yukie Maeda Mariane, Niigaki Juliana Ikeda, Zugaib Marcelo
Obstetrics Department, Faculty of Medicine, Universidade de São Paulo, Rua Valentim de Magalhães 100, ap 52, 03184-090 São Paulo-SP, Brazil.
J Ultrasound Med. 2007 Mar;26(3):309-16. doi: 10.7863/jum.2007.26.3.309.
The purpose of this study was to construct nomograms for diameters of the fetal main pulmonary artery (MPA), right pulmonary artery (RPA), and left pulmonary artery (LPA) according to gestational age (GA) and estimated fetal weight (EFW).
Between May 2005 and February 2006, MPA and branch artery diameters were prospectively estimated with ultrasonography in 220 healthy fetuses from 19 to 40 weeks' gestation and correlated with GA and EFW.
Mean MPA, RPA, and LPA diameters ranged from 2.93, 1.71, and 1.66 mm, respectively, at 19 weeks to 9.23, 5.49, and 5.65 mm at 40 weeks. Linear regression yielded the following formulas for the expected diameters according to GA: MPA=-2.77 + 0.30 x GA; RPA=-1.71 + 0.18 x GA; and LPA=-1.95 + 0.19 x GA. The following formulas were obtained by logarithm distribution for the expected diameters according to EFW: MPA=-1.165 + 0.247 x log of estimated fetal weight (lnFW); RPA=-0.651 + 0.141 x lnFW; and LPA=-0.718 + 0.150 x lnFW.
Nomograms of MPA and branch pulmonary artery diameters according to GA and EFW have been described, generating reference values.
本研究旨在根据孕周（GA）和估计胎儿体重（EFW）构建胎儿主肺动脉（MPA）、右肺动脉（RPA）和左肺动脉（LPA）直径的列线图。
在2005年5月至2006年2月期间，对220例孕19至40周的健康胎儿进行前瞻性超声检查，估计MPA和分支动脉直径，并将其与GA和EFW进行相关性分析。
平均MPA、RPA和LPA直径在19周时分别为2.93、1.71和1.66mm，在40周时分别为9.23、5.49和5.65mm。线性回归得出根据GA的预期直径公式如下：MPA = -2.77 + 0.30×GA；RPA = -1.71 + 0.18×GA；LPA = -1.95 + 0.19×GA。根据EFW通过对数分布得出预期直径的公式如下：MPA = -1.165 + 0.247×估计胎儿体重的对数（lnFW）；RPA = -0.651 + 0.141×lnFW；LPA = -0.718 + 0.150×lnFW。
已描述了根据GA和EFW的MPA和肺分支动脉直径列线图，生成了参考值。
