alexa Evaluation of sonographic diagnostic criteria for placenta accreta.
Reproductive Medicine

Reproductive Medicine

Journal of Pregnancy and Child Health

Author(s): Wong HS, Cheung YK, Zuccollo J, Tait J, Pringle KC

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Abstract PURPOSE: To compare the diagnostic value of reported sonographic criteria for placenta accreta and to develop a composite score system for antenatal evaluation. METHOD: Sixty-six women at risk for placenta accreta were examined for 9 cases of placenta accreta that were confirmed at delivery. The performance of previously reported gray-scale and Doppler sonographic criteria for the diagnosis of placenta accreta was analyzed individually. A composite score system was developed by combining selected sensitive or specific sonographic criteria, and its performance was evaluated. RESULTS: The criteria of obliteration of retroplacental clear space, a myometrial thickness of <1 mm, presence of vessels bridging placenta and uterine margin, disruption of the placental-uterine wall interface, and vessels crossing the sites of interface disruption showed a statistically significant association with placenta accreta. The disruption of the placental-uterine wall interface and the presence of vessels crossing these sites were the only 2 individual criteria that could distinguish placenta accreta from non-accreta, which could also be achieved by our composite score system using a cutoff value of 40, with a sensitivity of 89\% and specificity of 98\%. CONCLUSION: The diagnostic performance of the sonographic diagnostic criteria used in the diagnosis of placenta accreta varies, and a composite score system improves the overall accuracy. (c) 2008 Wiley Periodicals, Inc. This article was published in J Clin Ultrasound and referenced in Journal of Pregnancy and Child Health

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