Warkentin B, Spandau M
Z Geburtshilfe Perinatol. 1980 Apr;184(2):128-32.
Basing on external tocograms from the first stage of labour, the intensity of labour was compared with the preceding and subsequent labour interval. The following relative criteria of the intensity of labour were determined: amplitude, medium distance between the upward and downward slope, and the product of the factors. It was found that the intensity of labour depended on the preceding labour interval, whereas no connection between intensity of labour and the subsequent labour interval was noticed. The results are in favour of a myogenous origin and spread of the labour. The longer the muscle fibers are at rest between the individual labours, the more intense will the following labour be, which is produced by spontaneous local contraction.
根据第一产程的外部宫缩图，将产程强度与前、后产程间隔进行比较。确定了以下产程强度的相关标准：振幅、上升和下降斜率之间的平均距离以及各因素的乘积。结果发现，产程强度取决于前一产程间隔，而未发现产程强度与后一产程间隔之间存在关联。这些结果支持产程的肌源性起源和传播。个体产程之间肌肉纤维休息的时间越长，随后由自发性局部收缩产生的产程就越强烈。
