The possibility of high-precision ultrasound diagnosis of placenta ingrowth into the uterine scar after cesarean section

Abstract

Our statistical analysis, based on ultrasound examination of 7069 pregnant women, showed that both in the absence and in the presence of a scar on the uterus in the region of its lower segment, the placenta in the 3rd trimester of pregnancy was located extremely rarely, only in 0.1%. It was either primarily located in other parts of the uterus, or migrated from the lower segment of the uterus towards the bottom. In the case of the location of the placenta in this area, its ingrowth was not observed only in 2.3% of women. The main ultrasound signs of ingrowth of the placenta into the scar was the absence of its migration, as well as the presence of a combination of placenta previa with its localization in the scar zone. From the data obtained, it follows that the sensitivity of ultrasound diagnosis of placental accreta was 97.7%, and the specificity was 99.9%. According to our data, ingrown placenta in most cases can be delivered as early as 14–19 weeks, and the time spent on detecting this pathology usually does not exceed one minute.