19 - Placental Abruption Liu Wei Department of Ob & Gy...

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Placental Abruption Liu Wei Ren Ji hospital
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General Consideration Definition The separation of the placenta from its site of implantation after 20 weeks of gestation or during the course of delivery. Frequency 0.51%-2.33% (our country) 1% (other countries) Incidence of fetal death 200‰-350‰
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Etiology Uncertain (primary cause) Risk factors 1. Increased age and parity 2. Vascular diseases: preeclampsia, chronic hypertension, renal disease. 3. Mechanical factors: trauma, intercourse, polyhydramnios, 4. Supine hypotensive syndrome 5. Smoking, cocaine use, uterine myoma
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Pathology Main change hemorrhage into the decidua basalis → decidua splits → decidural hematoma → separation, compression, destruction of the placenta adjacent to it Types revealed abruption, concealed abruption, mixed type Uteroplacental apoplexy 子子子子子子
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Pathology
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Manifestation Vaginal bleeding companied with abdominal pain Mild type abruption≤ 1/3, apparent vaginal bleeding
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19 - Placental Abruption Liu Wei Department of Ob & Gy...

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