The Role Of Ultrasound In Detecting Of Placenta Precreta

Introduction: The placenta has a basic role in fetal health and functions as a necessary bridge to normal fetal development during pregnancy. The placenta has both embryonic and maternal components. The placental membrane separates the embryonic blood from maternal blood but is thin enough to allow diffusion and transport of nutrients and waste .placental developments is complex , but the clinically important elements can be easily recognized on ultrasound.The aim of this study was to assess the diagnostic accuracy of ultrasound in detecting the placenta precreta.Methods: A narrative review was performed within articles published a PubMed , Elsevier , SID and original text books to reach the aim. Results : Placental diseases range from abnormal morphology, size, location, extent, abruption and the presence of rare placental neoplasms of benign or malignant nature.Invasion of inner third of myometrium by trophoblat is physiologic that result in destruction of myometrium and pathologic attachment of the placenta.Risk factors include anterior placenta previa and an unexplained elevation in 16 week a-fetoprotein .The diagnosis is suspected using a combination of gray – scale and color flow Doppler ultrasound.Transvaginal imaging is a useful adjunct, especially with coexistent placenta previa because the extent of invasion in to bladder, pararectal and pelvic tissues may be evaluated.Conclusions: precreta associated with vaginal bleeding in pregnancy. They are also important causes of serious fetal and maternal morbidity and even mortality. Obstetricians should be alert to these sign to perform a complete ultrasonography. Ultrasound has a pivotal diagnostic accuracy in detecting the depth of placental invasion .Therefore a thorough fetal ultrasound must be done for detecting any possible placental abnormalities and in most cases it is needed color doppler sonography to be applied.

Keywords:

Placenta Precreta , Ultrasound