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【目的】探讨一种更好判断骨盆出口平面头盆不称的方法。【方法】选择 2 0 0例正常足月妊娠的孕妇 ,用骨盆出口后三角外接圆面积与胎头横截面积比较的方法和传统的判断试产的方法来决定孕妇分娩的方式。然后用精确概率计算的方法比较两种方法判断试产的准确性。【结果】传统的判断试产的方法 ,剖宫产率为 11 8%。而骨盆后三角外接圆面积与胎头横截面积比较的方法 ,剖宫产率为 5 8%。两者的差异经统计学的处理 ,有显著性意义。【结论】骨盆出口后三角外接圆面积与胎头横截面积比较是一个定量的判断试产的标准 ,判断试产的准确性高。
【Objective】 To explore a better way to judge the anomalous origin of the pelvis exit pelvis. 【Method】 Two hundred and seventy pregnant women with normal term pregnancy were selected to determine the mode of delivery for pregnant women by comparing the triangular circumscribed circular area with the fetal head cross-sectional area after pelvic exit and the traditional method of trial production. And then use the exact probability calculation method to compare the two methods to determine the trial production accuracy. 【Results】 The traditional method to judge the trial production, cesarean section rate was 11 8%. The pelvic triangle circumscribed area and fetal head cross-sectional area of comparison method, cesarean section rate was 58%. The difference between the two statistics by the treatment, a significant significance. 【Conclusions】 The comparison of the triangle circumscribed area and the cross-sectional area of the fetal head after pelvic exit is a quantitative standard to judge the trial production, and the accuracy of trial production is high.