الفهرس 
PLACENTAL ANATOMYOnly 14 pages are availabe for public view
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Abstract
Accurate antenatal diagnosis of morbid adherent placenta and placental invasion and degree of invasion of placenta, allowing multidisciplinary management at the time of delivery, has been shown to improve maternal and fetal outcomes.
Placenta previa and previous cesarean section are the two most important known risk factors for morbid adherent placenta and placental invasion.
This study aims to assess the accuracy of 3D ultrasound compared to 2D in predicting placental invasion in women with placenta previa.
This prospective observational cohort study was conducted at Ain Shams University Maternity Hospital (outpatient clinic) in the period between January 2018 and November 2019.
Regarding the most important criteria for 2D ultrasound in predicting placental invasion was loss of retroplacental space that show the highest significant non chance agreement with placental invasion.
Regarding 3D ultrasound and power doppler the most important criteria in predictive of placental invasion and bladder invasion was disruption of the hyperechoic serosa -bladder interface had the highest significant non chance agreement.
According to the pervious results and pervious discussion in summation 2D ultrasound show higher sensitivity over the 3d ultrasound while 3D ultrasound has higher specificity in predicting placental invasion using at least 2 criteria to diagnose in both ultrasound systems thus this make 3D ultrasound more accurate with slight significance value over 2D.
Regarding the cost of performing 3D ultrasound which had sensitivity of 94.4% high specificity value of 90.6% and PPV of 85.0% and NPV 96.7% compared to the 2D grayscale alone in predicting placental invasion prenatally which had high sensitivity value of 94.4% and specificity of 71.9% and PPV of 65.4% and NVP 95.8% much less than the cost of misdiagnosed patient with placental invasion by 2D have higher cost of pre-operative preparation for cesarean section with prediction of placental invasion and counseling of the mother about the risk of this condition . Thus performing 3D ultrasound and power Doppler to refine the positive data from 2D ultrasound.