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目的探讨迷走右锁骨下动脉的产前超声诊断方法及声像图特征,并回顾性分析其临床结局。方法于产前超声检查发现迷走右锁骨下动脉,对胎儿及出生后的婴儿进行随访观察,并对结果总结分析。结果发现并随访迷走右锁骨下动脉胎儿15例;作为单独异常指标6例,产前超声及生后随访均无异常表现;合并超声软指标异常3例,染色体检查证实均为21三体综合征;合并心内外畸形6例,1例行染色体检查结果为18三体综合征。结论三血管气管切面是诊断迷走右锁骨下动脉敏感且有效的切面;单纯迷走右锁骨下动脉的胎儿预后良好;迷走右锁骨下动脉是Down综合征的潜在超声指标。
Objective To investigate the diagnostic methods of prenatal ultrasound and the sonographic features of the right subclavian artery and to retrospectively analyze its clinical outcome. Methods In the prenatal ultrasound examination, vagal right subclavian artery was found. Fetal and postnatal infants were followed up, and the results were summarized and analyzed. Results Fifteen fetuses with vagal right subclavian artery were found and followed up. Among them, 6 cases were single abnormality index, and no abnormalities were found in prenatal ultrasound and follow-up. There were 3 cases with abnormal soft index in ultrasound and 21 cases with trisomy 21 ; 6 cases of combined cardiac deformity, 1 case of chromosomal test results for trisomy 18. Conclusion The trigeminal tracheal section is a sensitive and effective section for the diagnosis of the right subclavian artery. The fetus with simple vagal right subclavian artery has a good prognosis. The vagal right subclavian artery is a potential ultrasound index for Down syndrome.