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目的:探讨中晚孕胎儿主动脉升、弓、降,3个分支的内径和比值,以及弓部3个分支的间距,为超声诊断胎儿主动脉缩窄、分析诊断复杂先天性心脏病提供参考数据和线索。方法:通过胎儿生物学测量确定孕周后,在胎儿主动脉弓矢状切面测量主动脉各段及其3个分支的内径、分支间距,用线性相关回归方程分析它们与孕周的相关性;对比异常组与正常组之间的差异性。结果:正常组胎儿主动脉升、弓、降各段的内径,3个分支的内径以及它们之间的比值,弓部3个分支的间距,与孕周呈正相关,分支间距异常增宽组与正常组差异有统计学意义(t=5.680 6,P<0.01),主动脉3个分支间距大于正常的两个标准差有临床意义。结论:观测研究胎儿主动脉各段、3个分支内径以及之间的比值,弓部3个分支的间距,对分析、诊断胎儿复杂先心有一定价值。
OBJECTIVE: To investigate the diameter and ratio of ascending, descending, and trimming of the aorta in middle and late pregnancies and the distance between the three branches of the arch in order to provide reference for the diagnosis of congenital heart disease complicated by ultrasound Data and clues. Methods: After fetal gestational age was determined by fetal biological measurement, the inner diameter and branch spacing of each segment of the aorta and its three branches were measured in sagittal section of fetal aortic arch. Linear correlation regression equation was used to analyze the correlation between gestational age and gestational age. Differences between groups and normal groups. Results: The diameters of the ascending and descending aorta, the internal diameters of each section of the arch and the descending section, the internal diameters of the three branches and the ratios among them in the normal group were positively correlated with the gestational weeks, The difference between the normal group was statistically significant (t = 5.6806, P <0.01), the aortic three branches spacing greater than the normal two standard deviations have clinical significance. CONCLUSION: Observing the segments of fetal aorta, the diameter of the three branches and the ratio between them and the distance between the three branches of the bow have a certain value in analyzing and diagnosing fetal complex heart rate.