الفهرس 
Anatomy of the uterus and placentaيوجد فقط 14 صفحة متاحة للعرض العام
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المستخلص
Summary
Placenta accreta (PA) encompasses various types of abnormal placentation in which chorionic villi attach directly to or invade the myometrium.
There is high risk for maternal mortality in postpartum hemorrhage due to placenta accreta.
The placental examination should be routinely done in antenatal examination to detect any placental invasion abnormalities as placental invasion abnormality is important to be recognized owing to the potential for maternal morbidity and mortality.
Non invasive techniques such as ultrasonography (US), Color and power Doppler and magnetic resonance imaging (MR) that do not use ionizing radiation are preferred.
Ultrasonography is the primary modality of obstetric placental imaging because of its rapid availability, portability, and low cost. Its limitations include posterior placental positioning and patient body habitus. MRI, on the other hand, is excellent in the evaluation of the placenta, irrespective of its anatomical position within the uterus.
Color and power Doppler techniques permit direct visualization of placental vascularity, allowing assessment of both the uteroplacental and fetoplacental circulations
MRI is an excellent tool for the staging and topographic evaluation of placenta accrete as it can provide essential information about underlying pathologies.
The interven¬tional radiologist carries a major responsibility for the preventive management of hemorrhage due to placenta accreta diagnosed antepartum and is thus a crucial member of the delivery team.
Before delivery, bilateral internal iliac artery balloon occlusion is performed
The balloon on both catheters may be inflated intermittently during the surgical procedure or may be left inflated if excessive bleeding occurs, the catheters (with balloons deflated) maybe left in place for a short period after surgery, to expedite angiography and embolization in cases of postpartum hemorrhage.
Conclusion
Antenatal diagnosis of placenta accreta is very essential and primarily done with ultrasound and color Doppler yet MRI is confirmatory tool especially when diagnosis by ultrasound is equivocal and when diagnosis by ultrasound is difficult as in cases of posterior wall placenta , the interventional radiology plays an important role in decreasing maternal mortality and morbidity of placenta accreta