臀位阴道分娩禁忌症                     

   •骨盆条件不佳                        
   •巨大儿                           
   •严重早产                          
   •宫内生长受限、胎盘功能不全          
   •臀位足先露                          
   •胎头仰伸过度                      
   •胎儿异常                          
   •手臂上举
   •胎膜早破或产程没有进展             
   •缺乏助娩技术

                                                   25

                  臀位分娩
  
        大多数臀位分娩最佳径线和头位相同
             耻骨联合                             耻骨联合
  
  骶骨                                   骶骨   
 
        臀位                                   头位

                                                  26

 
                      臀位阴道分娩：
                      胎儿髋部娩出

                               •手轻轻托住
                                  出现的臀部       
                                                
                                •保持骶骨
                                  在前位

                                                   27

             娩出双腿-选择手法
                                                 28

                                轻轻牵拉
                        胎儿骨盆

                                      29

                        经阴道臀位牵拉术
                  中的前臂分娩

                             30

        MSV手法和耻骨上施压   

                                           31

                             
                      Duhrssen切开：
                      为嵌顿的胎头
                      切开宫颈

                                            32

                           忽略性肩先露
                           伴随手臂脱垂
                          
                         病理收缩环
                          

                         子宫下段膨出

                                            33

                            頦前位
                            分娩
                            机转
                     

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