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头位分娩占分娩总数的95%,头位难产占头位分娩总数的21.4%,占难产总发生率的2/3以上。在头位分娩中顺产与难产是相对的,可以互相转化,它受分娩三大因素(骨盆、胎儿、产力)错综复杂的关系所影响。在分娩过程中,骨盆和胎儿大小是不变因素,而胎头位置和产力是可变因素,因此如何评估三大因素的关系,及时发现难产并加以纠正,正确选择分娩方式,保障母婴安全,是产科工作者需要解决的问题。1978
Head childbirth accounted for 95% of the total number of deliveries, head dystocia accounted for 21.4% of the total number of headaches, accounting for more than 2/3 of the total incidence of dystocia. In the first childbirth delivery and dystocia are relative, can be transformed into each other, it is affected by the three factors of childbirth (pelvis, fetus, productivity) complex relationship. In the process of delivery, the pelvis and fetus size are invariable factors, and fetal head position and productivity are variable factors, so how to assess the relationship between the three factors, timely detection and correction of dystocia, the correct choice of mode of delivery to protect the mother and child Safety is a problem that obstetricians need to solve. 1978