Cervical relaxation cervical function is more common in congenital dysplasia of the isthmus, one of complications of uterine malformation; A small part of it is the sequelae of the cervical tear from the acquired injury. Professor Chenfenglin pointed out: Cervical women's examination + palace expansion test + dynamic digital hysterectomy + vaginal four-dimensional color Super + vaginal mirror can find the reason, as follows:
1 There is a history of cervical surgery such as cervical dilation, shaving, etc., emergency delivery or forceps delivery history.
2 It is easier to conceive, but it is also easy to miscarry or premature birth, and there are more than two natural miscarriages in the middle period of pregnancy. The characteristics of miscarriage are that there is no obvious paroxysmal abdominal pain before miscarriage, sudden rupture of the fetal membrane, the fetus is quickly delivered, the fetus is fresh, and there is no congenital abnormal development.
② 扩宫试验(Dilation test)，是诊断宫颈内口松弛的最可靠诊断技术。在非经非孕期，用8号扩宫棒，依次递减，试扩宫口。正常标准：5号扩宫棒不能自由通过宫颈内口。
The Dilation test is the most reliable diagnostic technique for the diagnosis of cervical cavity relaxation. In non-pregnancy, use the No. 8 expansion stick to decrease in order to try to expand the palace. Normal standard: No 5 dilatation rod can not freely pass through the cervix.
4 Dynamic digital uterine iodography showed that the cervical canal was pathologically dilated, with a diameter greater than 6 mm; B-ultrasound examination showed that the uterine cavity is wider, and if it is greater than 19 mm, there is a history of miscarriage that will be clearly diagnosed.
The length of the cervix is about 4cm, and the width of the cervix is about 4mm. It is all 4 but different units. The length of cervix and the width of cervix tube were not significantly different among the different weeks of pregnancy in normal single pregnant women.
Vaginal B ultrasound measures the length and width of the cervix, which is an important means of predicting the cervical factors of late onset and premature birth. Statistics show that the average length of the cervix is(36 ± 5) mm and the width of the cervix is(4 ± 1) mm. Using the cervical length ≤ 26mm as the boundary value, the sensitivity of preterm preterm preterm preterm preterm preterm preterm was 100 %, the specificity was 81 %, the positive prediction value was 55 %, and the negative prediction value was 100 %.
The cervix is too short and too wide, is the performance of cervical insufficiency, Chenfenglin's pre-pregnancy laparoscopic cervix implantation, can effectively attack late miscarriage.