Destro F, Calcagnile F, Ceccarello P L, Lando M, Destro M
J Clin Ultrasound. 1985 Nov-Dec;13(9):637-9.
The correlation between the placental echographic appearances and pulmonary maturity was studied in 32 cases of normal pregnancy between the 29th and 33d weeks. The placental appearance was classified according to Grannum's criteria, and an amniocentesis was performed in each case. Both an L/S ratio and a foam stability (Clements') test were performed on the amniotic fluid. There were 10 cases of grade I and 22 cases of grade II placenta in the series. There was one mature L/S ratio in each placental grade; both had intermediate results with Clements' test. These findings differ significantly from those published in the literature on the subject, which are based on investigations in more mature fetal populations.
对32例孕29至33周的正常妊娠病例，研究了胎盘超声表现与肺成熟度之间的相关性。根据格兰姆标准对胎盘表现进行分类，并对每例进行羊膜腔穿刺术。对羊水进行卵磷脂/鞘磷脂（L/S）比值测定和泡沫稳定性（克莱门茨）试验。该系列中有10例I级胎盘和22例II级胎盘。每个胎盘分级中有1例L/S比值成熟；两者在克莱门茨试验中均为中间结果。这些发现与该主题文献中发表的结果显著不同，后者是基于对更成熟胎儿群体的研究。
