After pregnancy, the uterus will gradually harden due to pregnancy reactions. This is a very normal phenomenon and will not soften over time. As the fetus in the belly becomes larger and larger, there will be objects in the uterus, and the surface of the uterus will naturally become very hard to prevent the fetus from being harmed. After 20 weeks of pregnancy or during delivery, the normally located placenta partially or completely separates from the uterine wall before the fetus is delivered, which is called placental abruption. Placental abruption is a serious complication in late pregnancy with an acute onset and rapid progression. If not treated in time, it can endanger the lives of mother and child. The reported incidence rate in China is 4.6‰~21‰, and the reported incidence rate abroad is 5.1‰~23.3‰. The incidence rate is related to whether the placenta is carefully examined after delivery. Some mild placental abruption may have no obvious symptoms before delivery. Only when the placenta is examined after delivery, blood clots are found at the site of abruption. Such patients are easily overlooked. Abdominal examination revealed a hard, board-like uterus with tenderness, especially at the site of placental attachment. The hard and board-like uterus caused by placental abruption needs to be differentiated from the following diseases: 1. Placenta previa: Mild placental abruption may also present as painless vaginal bleeding with no obvious physical signs. The diagnosis can be confirmed by a B-mode ultrasound examination to determine the lower edge of the placenta. Placental abruption on the posterior wall of the uterus does not have obvious abdominal signs and is difficult to distinguish from placenta previa, but it can also be identified by B-ultrasound examination. The clinical manifestations of severe placental abruption are extremely typical and are not difficult to distinguish from placenta previa. 2. Threatened uterine rupture: It often occurs during delivery, with symptoms such as strong uterine contractions, lower abdominal pain that refuses to be pressed, irritability, a small amount of vaginal bleeding, and signs of fetal distress. The above clinical manifestations are difficult to distinguish from severe placental abruption. However, threatened uterine rupture is often accompanied by cephalopelvic disproportion, labor obstruction or a history of cesarean section. Examination may reveal a pathological uterine contraction ring, and catheterization may reveal macroscopic hematuria. Placental abruption often occurs in patients with severe gestational hypertension, and examination shows a hard, board-like uterus. |
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