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Value of Crystal Vue technique in detecting the placenta accreta spectrum located in c-section scar area.
Medical Ultrasonography 2020 August 19
AIMS: Excessive placental invasion is a life-threatening obstetric disease. Determining the extent of placental villi invasion prenatally is crucial for formulating a surgical plan for pregnant women. The objective of this study was to explore the diagnostic accuracy of the Crystal Vue technique combined with two-dimensional (2D) ultrasound in detecting the degree of placenta accreta spectrum (PAS) located in the C-section scar area.
MATERIALS AND METHODS: Twenty-seven pregnant women with a strong suspicion of PAS underwent 2D ultrasound combined with a Crystal Vue examination. The diagnosis of 2D ultrasound alone and Crystal Vue combined with 2D ultrasound was statistically calculated, respectively. Cohen's kappa (k) was used to measure the consistency between these two ultrasound diagnosis and the postoperative diagnosis.
RESULTS: The postoperative diagnosis of 27 pregnant women was as follows: 6 cases of placental accreta, 11 cases of placental increta, 2 cases of placental percreta, 2 cases of placental accrete and placental increta, 2 cases of placental accreta and placental percreta, and 4 cases without PAS. Compared with the postoperative diagnosis, 20 cases (74.07%) were correctly diagnosed by 2D ultrasound alone, 6 cases were misdiagnosed, and one case the diagnosis was incomplete, which were substantially consistent with the postoperative diagnosis (k=0.612, p<0.01). Twenty-six cases (96.30%) were correctly diagnosed by Crystal Vue combined with 2D ultrasound; only one case was incomplete diagnosed which was almost perfectly consistent with the postoperative diagnosis (k=0.934, p<0.01).
CONCLUSIONS: Combining the Crystal Vue technique with 2D ultrasound can improve the diagnostic accuracy of ultrasound for detecting all types of PAS located in C-section scar area.
MATERIALS AND METHODS: Twenty-seven pregnant women with a strong suspicion of PAS underwent 2D ultrasound combined with a Crystal Vue examination. The diagnosis of 2D ultrasound alone and Crystal Vue combined with 2D ultrasound was statistically calculated, respectively. Cohen's kappa (k) was used to measure the consistency between these two ultrasound diagnosis and the postoperative diagnosis.
RESULTS: The postoperative diagnosis of 27 pregnant women was as follows: 6 cases of placental accreta, 11 cases of placental increta, 2 cases of placental percreta, 2 cases of placental accrete and placental increta, 2 cases of placental accreta and placental percreta, and 4 cases without PAS. Compared with the postoperative diagnosis, 20 cases (74.07%) were correctly diagnosed by 2D ultrasound alone, 6 cases were misdiagnosed, and one case the diagnosis was incomplete, which were substantially consistent with the postoperative diagnosis (k=0.612, p<0.01). Twenty-six cases (96.30%) were correctly diagnosed by Crystal Vue combined with 2D ultrasound; only one case was incomplete diagnosed which was almost perfectly consistent with the postoperative diagnosis (k=0.934, p<0.01).
CONCLUSIONS: Combining the Crystal Vue technique with 2D ultrasound can improve the diagnostic accuracy of ultrasound for detecting all types of PAS located in C-section scar area.
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