Keirse M J, Trimbos J B
Br J Obstet Gynaecol. 1981 Jul;88(7):739-46. doi: 10.1111/j.1471-0528.1981.tb01276.x.
Analysis of 594 antepartum cardiotocograms (CTGs) from 91 strictly normal pregnancies and of 2770 CTGs from 405 high-risk pregnancies showed a suspicious pattern in 7.2 and 17.4 per cent respectively. Careful analysis of these CTGs shows that they cannot be considered as either normal or abnormal, whereas their value for predicting the outcome of pregnancy is too limited to be of a direct clinical significance. Although their characteristics vary little between normal and high-risk pregnancy, their recurrence rate is much higher in high-risk pregnancy. During high-risk pregnancy this pattern was obtained on at least two consecutive recordings in 13.3 per cent and on at least three consecutive recordings in 6.2 per cent of patients, as compared to respectively 3.3 and 1.1 per cent during normal pregnancy. Although a single or even repeat occurrence of a suspicious CTG does not justify intervention during pregnancy, our study shows that an adequate follow-up of repeat CTGs will usually be able to distinguish pregnancies that are in need of intervention from those that are not.
对91例完全正常妊娠的594份产前胎心监护图（CTG）以及405例高危妊娠的2770份CTG进行分析，结果显示可疑模式分别占7.2%和17.4%。对这些CTG进行仔细分析后发现，它们既不能被视为正常，也不能被视为异常，而且其预测妊娠结局的价值极为有限，缺乏直接的临床意义。尽管它们在正常妊娠和高危妊娠之间的特征差异不大，但其复发率在高危妊娠中要高得多。在高危妊娠期间，13.3%的患者至少连续两次记录出现这种模式，6.2%的患者至少连续三次记录出现这种模式，而在正常妊娠期间这两个比例分别为3.3%和1.1%。虽然单次甚至重复出现可疑CTG并不能证明在孕期需要干预，但我们的研究表明，对重复CTG进行充分的随访通常能够区分出需要干预的妊娠和不需要干预的妊娠。
