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典型早产儿的PDA(动脉导管未闭),可根据物理学检查及胸部X 线予以诊断。但患有重症IRDS(特发性呼吸窘迫综合征)时,常掩盖PDA 的症状,使诊断延误。近年来由于心脏断层超声波的发展,可直接显示出极低体重儿的动脉导管,脉冲式超声多普勒使PDA 的诊断有了一个新的飞跃。在极低体重儿中,心功不全症状的PDA 发病率大致为20～30%。以心杂音为主的物理学检查异常,大都出现于生后2～3日内。故PDA 不同于其它少见病,可在疾病早期确诊。诊断
PDA (patent ductus arteriosus) in a typical premature infant can be diagnosed on the basis of physical examination and chest X-ray. However, severe IRDS (idiopathic respiratory distress syndrome) often masks the symptoms of the PDA, delaying the diagnosis. In recent years due to the development of cardiac ultrasound, can be directly displayed very low birth weight of the patent ductus arteriosus, pulsed ultrasound Doppler PDA diagnosis has taken a new leap forward. In very low birth weight infants, the incidence of PDA with symptoms of cardiac insufficiency is roughly 20 to 30%. To heart murmur-based physical examination abnormalities, mostly appear in 2 to 3 days after birth. Therefore, PDA is different from other rare diseases, early diagnosis of the disease. diagnosis