美《时代》杂志1980年2月25日报道:哈佛研究小组发现透明膜疾病(HMD)的主要病因为时不过4年。该病主要限于出生的早产婴儿。在美国,每年有20,000婴儿患此病。尽管治疗方法有所改善,但仍有3,000多名婴儿死亡。发生透明膜疾病的原因是由于婴儿的肺不能产生足够的活性物质,即肺表面活化剂。肺表面活化剂是一种白色的、似肥皂的化学物 The United States of America Time February 25, 1980 report: Harvard research team found that the main cause of hyaline membrane disease (HMD) in less than four years. The disease is mainly confined to born premature babies. In the United States, 20,000 infants a year suffer from the disease. Despite the improvement in treatment, more than 3,000 infants have died. The cause of hyaline membrane disease is due to the baby’s lungs can not produce enough active substance, namely lung surfactant. Pulmonary surfactant is a white, soapy chemical