Abstract #2136

Risk stratification for pregnancies with subamniotic/subchorionic hematoma by placental MRI

Kumi Harada¹, Yuki Himoto², Yoshitsugu Chigusa³, Seiichi Tomotaki⁴, Yasuhisa Kurata², Satoshi Morita⁵, Yuka Kuriyama Matsumoto¹, Aki Kido⁶, Mitsuhiro Kirita¹, Sachiko Minamiguchi⁷, Masaki Mandai³, and Yuji Nakamoto¹

¹Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan, ²Diagnostic Radiology and Nuclear Medicine, Kyoto University Hospital, Kyoto, Japan, ³Gynecology and Obstetrics, Graduate School of Medicine, Kyoto University, Kyoto, Japan, ⁴Pediatrics, Graduate School of Medicine, Kyoto University, Kyoto, Japan, ⁵Biomedical Statistics and Bioinformatics, Kyoto University Graduate School of Medicine, Kyoto, Japan, ⁶Radiology, Toyama University Hospital, Toyama, Japan, ⁷Diagnostic Pathology, Fujita Health University, Nagoya, Japan

Synopsis

Keywords: Placenta, Diagnosis/Prediction, subamniotic/subchorionic hematoma

Motivation: The clinical significance of subamniotic/subchorionic hematoma (SAH/SCH) is arguable; however, it can result in unfavorable outcomes for neonates.

Goal(s): Our goal was to explore useful methods of risk stratification in pregnancies with SAH/SCH, based on placental MRI.

Approach: Cases of SAH/SCH were classified according to the presence/absence of oligohydramnios and bloody amniotic fluid, and statistically analyzed for weeks at birth, periods in the neonatal intensive care unit (NICU), and respiratory management.

Results: SAH/SCH with oligohydramnios and bloody amniotic fluid increased the risk of preterm delivery and unfavorable neonatal outcomes. In particular, oligohydramnios increases the risk of preterm delivery.

Impact: When interpreting cases of SAH/SCH, particular attention should be paid to the presence of oligohydramnios, while it is important to avoid excessively negative prognostic assessments in cases with only bloody amniotic fluid.

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