正常分娩与异常分娩 张斌 zhangbinyuan(@yahoo.com.cn
正常分娩与异常分娩 张斌 zhangbinyuan@yahoo.com.cn
Three elements 3P) Powers assage Passenger --For a normal delivery to take place, each of these three factors must fulfil its own role and interact efficiently with the other two factors
Three elements(3P) • Powers • Passages • Passenger • ----For a normal delivery to take place, each of these three factors must fulfil its own role, and interact efficiently with the other two factors
The stages of labour First stage: full cervical dilatation Second stage: delivery of the baby Third stage: delivery of the placenta and membranes
The stages of labour • First stage:full cervical dilatation • Second stage:delivery of the baby • Third stage:delivery of the placenta and membranes
Cardinal movements in labour Fetal head descent and increased flexion Internal rotation · Extention Restitution External rotation
Cardinal movements in labour • Fetal head descent and increased flexion • Internal rotation • Extention • Restitution • External rotation
I Head floating, before engagement ( 2. Engagement; flexion, descent