Diagnostic value of three-dimensional color vascular imaging in umbilical cord knotting
Objective To analyze the diagnostic value of two-dimensional ultrasound imaging and three-dimensional color vascular imaging in umbilical cord knotting,so as to reduce perinatal fetal mortality.Methods From January 2019 to April 2022,30 pregnant women with suspected umbilical cord knotting in New Chang'an International Maternity Hospital were selected.All pregnant women underwent high-resolution simulated blood flow mode imaging of three-dimensional color Doppler and two-dimensional color Doppler blood flow imaging,and their imaging data were analyzed.All 30 pregnant women suspected of umbilical cord knotting were confirmed after delivery.Results Among the 30 pregnant women,18 cases of umbilical cord false knot and 12 cases of umbilical cord true knot were confirmed after delivery.The sensitivity,specificity,positive predictive value,negative predictive value of three-dimensional ultrasound imaging in the diagnosis of umbilical cord knotting were higher than those of two-dimensional ultrasound imaging,and the misdiagnosis rate and missed diagnosis rate were lower than those of two-dimensional ultrasound imaging,and the differences were statistically significant(P＜0.05).Conclusion The high-resolution simulated blood flow mode imaging of three-dimensional color Doppler has high specificity in the diagnosis of umbilical cord knotting.The sonographic images of the true and false knots of the umbilical cord have different characteristics.Three-dimensional angiography is required for the diagnosis of suspected umbilical cord knots by two-dimensional color Doppler ultrasound.Three-dimensional angiography can visually and stereoscopically display the morphological structure and blood flow direction of the umbilical cord compared with two-dimensional color Doppler technology,the ultrasonic manifestations are characteristic and have certain value for the diagnosis of the true and false knots of the umbilical cord and the degree of tightness.
color Doppler ultrasoundthree-dimensional angiographyumbilical cord knotting
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NSTL
万方数据
