Railsback K P, Haller W S
Am J Med Technol. 1978 Sep;44(9):852-4.
The literature suggests that the presence of cellular debris and sediment in amniotic fluid samples may alter the value of the lecithin/sphingomyelin (L/S) ratios, with a loss of as much as 75 percent of the surface-active lecithin1 and consequently a marked change in the L/S ratio. We wish to report our findings on 22 amniotic fluids obtained by transabdominal amniocentesis and analyzed with and without preliminary centrifugation. We find the L/S ratio is indeed unaltered by centrifugation. However, the actual amounts of lecithin and sphingomyelin appear to be lower in centrifuged samples.
文献表明，羊水样本中细胞碎片和沉淀物的存在可能会改变卵磷脂/鞘磷脂（L/S）比值，表面活性卵磷脂会损失多达75%，从而导致L/S比值发生显著变化。我们希望报告经腹羊膜穿刺术获取的22份羊水样本的研究结果，这些样本在经过初步离心和未经过初步离心的情况下均进行了分析。我们发现，离心并未改变L/S比值。然而，离心样本中卵磷脂和鞘磷脂的实际含量似乎较低。
