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臀位分娩的特点及可能产生的问题一、娩头困难 1.臀小于肩,肩小于头,后出的头既大且硬。臀位分娩与头位不同,头先露时,只要大而硬的头部通过产道之后,胎肩和胎臀便可顺利地从已被胎头充分扩张的产道娩出;而臀位则不同,最先以小而软的臀为先露入盆,在产道尚未完全扩张,甚至宫口尚未开全时,足膝或臀部即可通过,结果必然导致胎肩尤其是胎头娩出困难。
Breech delivery characteristics and possible problems First delivery difficulties 1. Buttocks less than the shoulder, shoulder less than the head, after the head is both large and hard. Breech delivery and head position is different, the first first exposed, as long as the big and hard head through the birth canal, the shoulder and the buttocks can be smoothly from the fetal head has been fully expanded birth canal delivery; and breech is different, The first to small and soft buttocks first exposed into the basin, the birth canal has not fully expanded, and even the cervix has not yet opened the full leg or the buttocks can be passed, the result will inevitably lead to shoulder, especially fetal head was difficult.