Ultrasound for Previa Accreta in Women with Prior C-Section
This study by Jauniaux and Bhide (AJOG, 2017) sought to assess the accuracy of using ultrasound to diagnose placenta accreta.
Systematic Review and Meta-Analysis
14 cohort studies including 3,889 pregnancies complicated with placenta previa/low-lying placenta and one or more previous C-sections were surveyed. There were 328 cases of placenta previa accreta, 90% (298 cases) of which were diagnosed with ultrasound. The rate of placenta previa accreta in women with one prior C-section was 4.1%, and in women with at least 2 previous C-sections it was 13.3%. C- hyst rate of 89.7% (208/232) was extracted from the data. Due to the strong performance characteristics of ultrasound in the diagnosis of accreta, the authors call for ultrasound screening protocols to be put in place.
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