Gorodeski I G, Haimovitz L, Bahari C M
J Perinat Med. 1982;10(6):286-92. doi: 10.1515/jpme.1982.10.6.286.
The accuracy rates of 3 diagnostic methods, namely pH determination, fern test and nile blue sulphate (NBS) staining, in the evaluation of women with prolonged premature rupture of fetal membranes (PRM), were investigated in a prospective study. Two hundred and sixty-two women, divided into control and test groups, were examined. A total of 1725 tests were performed. The results indicate that these tests have high inaccuracy rates which increase progressively when more than one hour has elapsed since the rupture of the membranes, and become unreliable after 24 hours. It is concluded that in cases of prolonged PRM these tests provide no better diagnostic information than that obtained by clinical evaluation.
在一项前瞻性研究中，对三种诊断方法，即pH值测定、羊齿状结晶试验和硫酸尼罗蓝（NBS）染色，在评估胎膜早破时间延长的女性中的准确率进行了调查。将262名女性分为对照组和试验组进行检查。共进行了1725次检测。结果表明，这些检测的错误率很高，自胎膜破裂超过1小时后错误率逐渐增加，24小时后变得不可靠。得出的结论是，在胎膜早破时间延长的情况下，这些检测提供的诊断信息并不比临床评估获得的信息更好。
