新生儿肺出血是新生儿时期的危重疾病,其发病机理尚未完全明瞭,临床上缺乏早期诊断的方法,多数是通过病理解剖明确诊断,是新生儿死亡的重要原因之一。其发病率为活产新生儿的1‰,Esterly报告生后2周以内死亡753例中肺出血有135例,占17.8%,Cole报告新生儿大量肺出血占新生儿尸检的9%。中岛报告87例新生儿尸检中肺两叶以上出血者23例,占26.4%。它的发生与新生儿、早产儿内在的生理缺陷及围产期的重症疾病如重度窒息、肺透明膜病、休克、凝血障碍 Neonatal pulmonary hemorrhage is a critical disease in neonatal period, the pathogenesis is not yet fully understood, the lack of clinical diagnosis of early diagnosis, most of them are clearly diagnosed by pathological anatomy, one of the important causes of neonatal death. The incidence was 1 per 1,000 live births. Esterly reported 753 cases of pulmonary hemorrhage in 753 cases within 2 weeks of death, accounting for 17.8%. Cole reported massive neonatal pulmonary hemorrhage accounting for 9% of neonatal autopsies. Nakashima reported 87 cases of neonatal autopsy in the two leaves more than 23 cases of bleeding, accounting for 26.4%. It occurs with newborns, premature infants with intrinsic physiological defects and perinatal severe diseases such as severe asphyxia, hyaline membrane disease, shock, coagulopathy