Placenta accreta refers to the direct invasion of the embryonic villi into the uterine muscle layer, which is an extremely dangerous form of embryo implantation. Placenta accreta often occurs in early pregnancy and is one of the more serious obstetric complications. The normal embryo is separated from the uterus by the uterine wall. The endometrium itself can prevent the invasion of chorionic cells on the embryo, but when the uterine wall is injured, the embryo may directly enter the uterine muscle layer or even outside the uterus. When the embryonic hair invades the myometrium, it spreads out like the roots of a tree and becomes deeply embedded there. The embedded part of the embryo cannot be separated on its own, and artificial separation will damage the uterine muscle layer, which may cause internal bleeding, rupture, or even death of the patient. Placenta accreta refers to the direct invasion of the embryonic villi into the uterine muscle layer, which is an extremely dangerous form of embryo implantation. Placenta accreta often occurs in early pregnancy and is one of the more serious obstetric complications. The normal embryo is separated from the uterus by the uterine wall. The endometrium itself can prevent the invasion of chorionic cells on the embryo, but when the uterine wall is injured, the embryo may directly invade the uterine muscle layer and even eat into the outside of the uterus, which is called an implantation embryo. When the embryonic hair invades the uterine myocardium, the embryo spreads out intricately and embeds deeply into the uterine myocardium like a tree with roots. The embedded part of the embryo cannot be separated on its own, and artificial separation will damage the uterine myocardium, which may cause internal bleeding, shock, uterine perforation, and even death of the patient. In the past, surgical removal of the hysterectomy was the main treatment method, but in recent years, the number of successful cases of conservative treatment has been gradually increasing. Types of placenta accreta: 1. Shallow invasion - adhesive embryo: It is caused by the immediate adhesion of the villi to the myometrium of the uterus. Some of these embryos may be able to break away on their own, but some will remain in the uterine cavity and require artificial separation. The surgical treatment is more difficult. 2. Middle and high level invasion - implanted embryo: The embryo invades part of the uterine myolayer, and part of it cannot be separated on its own. The uterine myolayer is damaged during artificial separation. Under the microscope, the villi can be seen invading the myometrium. 3. Deep invasion - penetrating embryo: The embryo invades the myometrium of the uterus and passes through the myometrium of the uterus directly to the serosa, which can often lead to uterine rupture and can only be treated by surgery. |
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