Uterine relaxation

Introduction The incidence of uterine relaxation is about 1/20, which is caused by the inability of the myometrium to contract after the placenta is discharged to control blood loss. Naturally produced mother, because the baby is delivered through the birth canal, the uterus is swollen and slack. Cervical relaxation is a cervical insufficiency caused by cervical hypoplasia or cervical laceration, which is the main cause of repeated spontaneous spontaneous abortion and repeated preterm birth. It is generally believed that it is mostly related to cervical injury caused by curettage, childbirth or surgical operation, especially the large-month artificial abortion forceps, which can easily damage the internal cervix. A small number of patients have congenital dysplasia.

Cause

Risk factors: Causes excessive uterine dilatation (multiple pregnancy and polyhydramnios), uterine fragility (expired pregnancy or chorioamnionitis) and limited uterine contraction (using uterine relaxation drugs or general anesthesia). It is generally believed that it is mostly related to cervical injury caused by curettage, childbirth or surgical operation, especially the large-month artificial abortion forceps, which can easily damage the internal cervix. A small number of patients have congenital dysplasia.

an examination

Related inspection

Vaginal palpation abdominal shape palpation

It is often diagnosed by palpation of the abdomen, and the sign is that the uterus is soft. About 75% of postpartum hemorrhage is caused by weak uterine contractions, which is the main cause of postpartum hemorrhage, often leading to instability of vital signs.

The diagnosis of intrauterine mouth relaxation can be based on the following points:

1 There is a history of cervical surgery such as cervical dilation, curettage, and a history of urgency or forceps.

2 It is easier to conceive, but it is also easy to abort or premature birth, and there are more than two times of a history of spontaneous abortion in the second trimester. The characteristics of abortion are: no obvious paroxysmal abdominal pain before abortion, sudden fetal membrane rupture, the fetus is delivered very quickly, the fetus is fresh, no congenital abnormalities.

2 In non-pregnancy, the cervical cervix is shorter than 1.5 cm or the 8th cervical dilator easily passes through the uterus, without resistance or pain. During pregnancy, the cervical canal is short, and both the internal and external uterus are loose, which can be referred to.

4 uterine lipiodol angiography showed that the cervical canal was pathologically dilated, the diameter was greater than 6 mm; B-ultrasound showed that the uterus was wide, if more than 19 mm, a history of miscarriage will be a clear diagnosis.

Differential diagnosis

Uterine relaxation needs to be identified as follows.

The main clinical features of congenital cervix relaxation are premature birth or miscarriage in each pregnancy, while acquired uterine cervix is characterized by an earlier or premature birth or abortion, or a normal pregnancy. Then there is a premature birth or a miscarriage for some reason.

It is often diagnosed by palpation of the abdomen, and the sign is that the uterus is soft. About 75% of postpartum hemorrhage is caused by weak uterine contractions, which is the main cause of postpartum hemorrhage, often leading to instability of vital signs.

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