Trimbos J B, Keirse M J
Br J Obstet Gynaecol. 1978 Dec;85(12):907-13. doi: 10.1111/j.1471-0528.1978.tb15852.x.
Antepartum cardiotocographs (CTGs) were obtained at weekly intervals from 34 weeks onwards and twice weekly from 40 weeks onwards in 91 strictly normal pregnancies. The Fischer score was used to assess the 594 CTGs obtained. Ominous patterns were not encountered but 7.2 per cent of CTGs showed a suspicious pattern. Absence of accelerations and an oscillatory amplitude of less than 10 beats/minute contributed to respectively 95 and 88 per cent of these patterns. The combination of reduced variability and absence of accelerations accounted for 84 per cent of suspicious CTGs. This pattern is compatible with normal pregnancy even when fetal movements are present. One-third (37 per cent) of perfectly normal pregnancies had a suspicious CTG on at least one occasion and in 9 per cent of cases it was found twice or more. This should be borne in mind when using antepartum CTG in the surveillance of high-risk pregnancy.
在91例严格意义上的正常妊娠中，从34周起每周进行一次产前胎心监护（CTG），从40周起每周进行两次。使用Fischer评分对获得的594份CTG进行评估。未发现不祥模式，但7.2%的CTG显示出可疑模式。加速缺失和振荡幅度小于10次/分钟分别占这些模式的95%和88%。变异性降低和加速缺失的组合占可疑CTG的84%。即使存在胎动，这种模式也与正常妊娠相符。三分之一（37%）的完全正常妊娠至少有一次出现可疑CTG，9%的病例中发现两次或更多次。在高危妊娠监测中使用产前CTG时应牢记这一点。
