先天性膈疝(CDH)在不同报道中发生率各异1/2000～5000活产,死亡率为24％～95％。主要死于继发肺发育不良和持续性肺高压的呼吸机能不全。在CDH中肺发育不良主要是由于疝的腹腔内腔使胸内受压并出现肺血流的改变。CDH的产前超声诊断已报道早到15孕周,在妊娠这样早的阶段存在这种损害被认为是临床结局不良的指 Congenital diaphragmatic hernia (CDH) in different reports of different rates of 1/2000 ~ 5000 live births, the mortality rate was 24% to 95%. Mainly died of secondary hypoplasia and persistent pulmonary hypertension respiratory insufficiency. Pulmonary dysplasia in CDH is mainly due to intra-abdominal pressure in the hernia and changes in pulmonary blood flow. Prenatal ultrasound diagnosis of CDH has reported that as early as 15 gestational weeks, the presence of such damage during such an early stage of pregnancy is considered a sign of poor clinical outcome