Dias T, Abeykoon S, Kumarasiri S, Gunawardena C, Pragasan G, Padeniya T, Pathmeswaran A
District General Hospital, Ampara and Faculty of Medicine, University of Kelaniya, Sri Lanka.
Ceylon Med J. 2016;61(3):106-112. doi: 10.4038/cmj.v61i3.8345.
To construct symphysis-pubis fundal height (SFH) charts to estimate fetal size in pregnant women with a normal body mass index (BMI) and to describe the variation of SFH measurements according to BMI.
cross sectional study was carried out at Ampara and Gampaha Districts in Sri Lanka. Women with normal nutritional and health status, normal BMI and minimal environmental constraints on fetal growth, with ultra sound confirmation of dates by fetal crown-rump length measurements between 11 weeks and 13 weeks + six days,had their SFH measured, using non-elastic tape and standard techniques, between 24 and 41 weeks gestation. Only one measurement of SFH was obtained from each pregnant woman. Linear and polynomial regression models were fitted separately to the means and standard deviations (SD) as functions of gestational age to identify the model with the best fit. Centiles were derived from the mean and SD at each gestational age.
Pregnant women from the districts of Ampara (n=387) and Gampaha (n=200) were recruited. Other than a difference of -1.5 cm (95% CI -2.27 to -0.23) at 38 weeks of gestation, there were no significant differences between the SFH measurements obtained from women with normal BMI in Ampara and Gampaha Districts. Using the SFH measurements from the Ampara sample, charts were created for 10th, 50th and 90th centile values of SFH. At 40 weeks of gestation these were 34 cm, 37 cm and 41 cm respectively. At 40 weeks gestation, the variation in SFH measurements between BMI sub groups within the normal range was approximately 1.4 cm to 1.6 cm.
These SFH charts could be used to estimate fetal size in pregnant women with normal BMI.
构建耻骨联合宫高（SFH）图表，以估计体重指数（BMI）正常的孕妇的胎儿大小，并描述根据BMI进行的SFH测量值的变化。
在斯里兰卡的安帕拉和甘帕哈地区开展了一项横断面研究。营养和健康状况正常、BMI正常且胎儿生长的环境限制最小的妇女，通过在11周和13周+6天之间测量胎儿头臀长度进行超声孕周确认，在妊娠24至41周期间，使用无弹性卷尺和标准技术测量其SFH。每位孕妇仅获得一次SFH测量值。分别将线性和多项式回归模型拟合到作为孕周函数的均值和标准差（SD），以确定拟合最佳的模型。百分位数由每个孕周的均值和SD得出。
招募了来自安帕拉地区（n = 387）和甘帕哈地区（n = 200）的孕妇。除了在妊娠38周时相差-1.5 cm（95%CI -2.27至-0.23）外，安帕拉和甘帕哈地区BMI正常的妇女获得的SFH测量值之间没有显著差异。使用来自安帕拉样本的SFH测量值，创建了SFH第10、第50和第90百分位数的图表。在妊娠40周时，这些值分别为34 cm、37 cm和41 cm。在妊娠40周时，正常范围内BMI亚组之间的SFH测量值变化约为1.4 cm至1.6 cm。
这些SFH图表可用于估计BMI正常的孕妇的胎儿大小。
