FERRON M, BILODEAU R
Can Med Assoc J. 1963 Nov 23;89(21):1064-7.
A simple and inexpensive test is described which permits positive identification of amniotic fluid by its fern-type crystallization. It permits a rapid and certain differential diagnosis between leukorrhea, hydrorrhea, urinary incontinence and spontaneous amniotomy. The crystallization test was shown to be most reliable and the few sources of error are easily avoided. The test is inhibited by cellular debris or blood when it is in a concentration greater than 1:10. Centrifugation permits the reappearance of fern-leaf crystallization. The typical image resembles that of the crystallization of cervical mucus. However, amniotic fluid crystallizes on the entire smear, whereas mucus crystallizes in a linear fashion. Cervical mucus crystallization is normally absent during pregnancy. It may occur in cases of threatened abortion. The authors have performed the test in combination with a nitrazin paper test in a series of 192 patients. In their hands it has given nearly perfect results.
本文描述了一种简单且廉价的检测方法，该方法可通过羊齿状结晶对羊水进行阳性鉴定。它能够快速且准确地鉴别白带、水样白带、尿失禁和胎膜早破。结晶试验被证明是最可靠的，且少数误差来源很容易避免。当细胞碎片或血液浓度大于1:10时，该试验会受到抑制。离心可使羊齿叶状结晶重现。典型图像类似于宫颈黏液的结晶。然而，羊水在整个涂片上结晶，而黏液呈线性结晶。孕期宫颈黏液通常不会结晶，在先兆流产病例中可能会出现。作者对192例患者进行了该试验，并与硝嗪纸试验联合使用。在他们手中，该试验几乎取得了完美的结果。
