The rotational thromboelastogram (ROTEM) test can be performed on patients with placenta previa/accreta/increta/percreta who have a high likelihood of massive bleeding, and the predictors can be identified by comparing the patients who actually show massive bleeding with those who do not. Applying these predictive factors to pregnant women undergoing cesarean section after diagnosis of placenta previa/accreta/increta/percreta, it will be advantageous for the perioperative management because it is possible to select pregnant women with a factor of massive bleeding.
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Blood loss
Timeframe: 1 min after finishing an operation
Change of INTEM
Timeframe: 10 min after spinal anesthesia, 5 min after baby delivery, 1 min after finishing operation
Change of EXTEM
Timeframe: 10 min after spinal anesthesia, 5 min after baby delivery, 1 min after finishing operation
Change of APTEM
Timeframe: 10 min after spinal anesthesia, 5 min after baby delivery, 1 min after finishing operation
Change of FIBTEM
Timeframe: 10 min after spinal anesthesia, 5 min after baby delivery, 1 min after finishing operation