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首页> 外文期刊>Acta Obstetricia et Gynecologica Scandinavica: Official Publication of the Nordisk Forening for Obstetrik och Gynekologi >Electrohysterography of labor contractions: Propagation velocity and direction
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Electrohysterography of labor contractions: Propagation velocity and direction

机译：宫缩分娩的电子宫腔造影：传播速度和方向

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Objective Electrohysterographic assessment of the propagation velocity of uterine depolarization has been introduced as a promising predictor of preterm labor. Therefore, the objectives of this study were to characterize the uterine electrohysterographic signals during labor and to determine the propagation velocity and propagation direction of electrohysterographic signals. Design Descriptive study. Setting Department of Obstetrics and Gynecology, Aarhus University Hospital, Denmark. Population Eight women in active labor at term. Methods Electrohysterograms (three channels) were recorded using surface electrodes placed abdominally along the vertical median axis with an inter-electrode distance of 6.5-11.2 cm. In total, 89 contractions were analyzed. Results Electrohysterographic characteristics: The duration of the contractions was 61.0 ± 18.0 s (mean ± SD). The median frequency of the power spectrum density was 0.51 (0.44; 0.51) Hz (median; 10th; 90th percentile). The greatest signal magnitude was obtained by the electrode in the centermost position. The propagation velocity: 2.15 (0.66; 13.8) cm/s in the upper part and 1.53 (0.58; 6.7) cm/s in the lower part of the uterus. Propagation direction: Both downward (58%) and upward (42%) propagation of the electrohysterographic signals occurred. Moreover, downward and upward propagations were recorded simultaneously in the upper and lower part of the uterus, suggesting a multidirectional propagation pattern. Conclusions Labor contractions, expressed by electrohysterographic signals, propagate both in the downward and upward direction, a phenomenon that must be taken into account when determining the propagation velocity for preterm labor diagnostics.
机译：目的对子宫去极化的传播速度进行电子宫照相术评估，将其作为早产的有希望的预测指标。因此，本研究的目的是表征分娩过程中的子宫电子宫信号，并确定电子宫信号的传播速度和传播方向。设计描述性研究。丹麦奥尔胡斯大学医院妇产科设置部门。人口八名在职妇女在职。方法使用表面电极沿垂直中线在腹部放置，电极间距离为6.5-11.2 cm，记录子宫电图（三个通道）。总共分析了89次收缩。结果电宫缩特征：收缩持续时间为61.0±18.0 s（平均±SD）。功率谱密度的中值频率为0.51（0.44; 0.51）Hz（中位数;第10;第90个百分位数）。最大的信号幅度是通过位于最中心位置的电极获得的。传播速度：子宫上部2.15（0.66; 13.8）cm / s，子宫下部1.53（0.58; 6.7）cm / s。传播方向：电子宫信号的向下传播（58％）和向上传播（42％）。此外，在子宫的上部和下部同时记录了向下和向上的传播，表明了多向传播模式。结论用电子宫电信号表示的劳动收缩沿上下方向传播，在确定早产诊断的传播速度时必须考虑这一现象。

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