Eipper H, Apel P
Zentralbl Gynakol. 1980;102(2):76-9.
The limiting value (WI) was derived from the product of labour parameters frequency (F) and time which had been determined by tocography. The following equation was used: (see formula in text). That limiting value is an absolute number, with any tocographic findings in excess of it being interpreted as premature labour. Tocographically negative findings were retrospectively compared to pregnancy outcomes. Deliveries of underweight children occurred only in four cases, two of them having been caused by premature rupture, though only one third of 147 women, transferred to the authors' hospital for safely diagnosed (n=108) or suspected (=39) premature labour, had been hospitalised and tocolysed. This seems to confirm the authors' approach which is likely to result in higher standards in obstetric practice.
极限值（WI）由产力参数频率（F）与通过宫缩图测定的时间的乘积得出。使用了以下公式：（见文中公式）。该极限值是一个绝对值，任何超过它的宫缩图结果都被解释为早产。对宫缩图呈阴性的结果进行回顾性分析，并与妊娠结局进行比较。低体重儿的分娩仅发生在4例中，其中2例是由胎膜早破引起的，尽管在147名因确诊（n = 108）或疑似（n = 39）早产而转诊至作者所在医院的妇女中，只有三分之一的人住院并接受了宫缩抑制治疗。这似乎证实了作者的方法，该方法可能会提高产科实践的标准。
