Sherer D M, Abramowicz J S, Smith S A, Woods J R
Department of Obstetrics and Gynecology, Strong Memorial Hospital, Rochester, New York.
Obstet Gynecol. 1991 Nov;78(5 Pt 1):819-22.
A prospective study was performed to examine the hypothesis that sonographically homogeneous echogenic amniotic fluid (AF) may provide a marker for the presence of meconium-stained AF. Twenty term gestations in which homogeneous echogenic AF was demonstrated sonographically were compared with 40 cases with sonographically clear AF. Two cases in the study group had meconium-stained AF at delivery. All of the controls had clear fluid by amniocentesis (performed for lung maturation studies) immediately after the sonographic examination. Thus, homogeneous echogenic AF had a sensitivity of 100%, a specificity of 69%, a positive predictive value of 10%, and a negative predictive value of 100% in detecting meconium. We conclude that homogeneous echogenic AF does not necessarily detect meconium-stained AF.
进行了一项前瞻性研究，以检验超声检查显示的均匀回声羊水（AF）可能是胎粪污染羊水存在的标志物这一假设。将超声检查显示为均匀回声羊水的20例足月妊娠与40例超声检查显示羊水清晰的病例进行比较。研究组中有2例在分娩时羊水被胎粪污染。所有对照组在超声检查后立即通过羊膜穿刺术（用于肺成熟研究）获得清亮羊水。因此，均匀回声羊水在检测胎粪方面的敏感性为100%，特异性为69%，阳性预测值为10%，阴性预测值为100%。我们得出结论，均匀回声羊水不一定能检测出胎粪污染的羊水。
