Methods Amnionic fluid was obtained during the cesarean section of 41 normal term pregnancies. LBC was performed on each specimen, and lecithin-sphingomyelin(L/S) ratio was detected simultaneously.

• 方法 采用库尔特 Micro Diff II全自动血细胞分析仪对 41例正常足月妊娠剖宫产时的羊水标本进行L BC的测定 ,并对同一标本采用薄板层析法测定了卵磷脂 /鞘磷脂比值 (L ecithin- sphingomyelin,L / S比值 )。