Akhter M S, Savior J F, Akhter I A
J Pak Med Assoc. 1977 Jan;27(1):256-8.
The amniotic fluid study of 80 samples from 40 patients, obtained by amniocentesis between 28 and 40 weeks of pregnancy, was carried out. It was noted that L/S (Lecithin/Sphingomyelin) ratio was significantly different at 36-38 weeks of pregnancy when compared with values in pregnancies of less than 36 weeks gestation (P less than 0001). No cases of RDS occurred when the L/S ratio was mature 4 or more. A brief review of recent developments in etiology of RDS are also presented.
对40例患者在妊娠28至40周期间通过羊膜穿刺术获取的80份羊水样本进行了研究。结果发现，与妊娠小于36周时的值相比，妊娠36 - 38周时卵磷脂/鞘磷脂（L/S）比值有显著差异（P小于0.001）。当L/S比值成熟度为4或更高时，未发生呼吸窘迫综合征（RDS）病例。还简要回顾了RDS病因学的近期进展。
