产道的哪些异常会导致难产 张彦玲 山西省人民医院
产道分为骨产道和软产道两个部分，骨产道就是老百姓所说的骨盆对产道的影响是最大的，医学上把骨产道分为假想的三个平面，骨盆、出口平面，中骨盆是最短的、最小的一个平面，即便孩子入盆了，如果中骨盆过不去或者出口过不来，那还会出现难产。软产道就是子宫还有宫颈、阴道、盆里的一些软组织共同构成了软产道，子宫如果有畸形，比如说单角子宫，或者子宫上长的肌瘤，位置不合适比较大或者子宫曾经做过手术，还有些宫颈本身有病变，或者宫颈上长的肌瘤或者宫颈的组织先天就纤维比较硬，也可能会发生难产。还有阴道有时候会长横隔、纵隔或者阴道上长的囊肿孩子的下降过程中，也会阻碍孩子抬臀或者抬臀的下降会出现难产，当然宫颈如果有宫颈的一些癌症这样的病变。一般是不主张从阴道分娩的，大部分会选择剖腹产的
Which abnormalities of birth canal will cause dystocia
The birth canal is divided into bone birth canal and soft birth canal, The bone birth canal is that the pelvis, as the common people say, has the greatest influence on the birth canal, In medicine, the birth canal is divided into three imaginary planes, Pelvis, exit plane, The middle pelvis is the shortest, smallest plane, Even if the child is in the pot, If the middle pelvis doesn't cross or the outlet doesn't cross, There's going to be dystocia. The soft birth canal is composed of the uterus, cervix, vagina and some soft tissues in the basin, If the uterus is deformed, For example, a monocular uterus, Or fibroids in the womb, The position is not suitable, or the uterus has been operated on, There are also cervical lesions, Or the fibroids on the cervix or the tissues of the cervix are hard, Dystocia may also occur. And sometimes there are cysts in the vagina, in the septum, in the mediastinum, or in the vagina, It can also hinder the child's hip lift or the drop of hip lift, resulting in dystocia, Of course, if there are some cervical cancer such lesions. In general, vaginal delivery is not recommended, Most will choose caesarean section
