The Exploration In Diagnosis Of Fetus Deformity By Ultrasonography

Objective To explore the diagnostic value of ultrasound of fetus congenital deformity. Methods A total of 3516 women during 13-40 gestational weeks underwent real-time color Doppler ultrasonography to find out fetal congenital anomalies. Take the thalamencephal cross section, the section cerebelli,the posterior cranial fossa section,the lateral cerebral ventricle section,the labial part coronal section,the spinal column longitudinal section,the quadr-chamber of heart section, the breast and abdominal wall cross section, the kidney cross section,magenblase and bladder section, the extremities longitudinal section ( including humerus, ulna, spoke bone, thigh bone, shin bone and fibula ) and the placenta longitudinal section .All the cases were tracked within seven days after delivery. Results In all 3516 pregnant women, 101 cases of deformity were found , 5 cases misdiagnosed and 18 cases failed to be diagnosed. The sensitivity is 82.2%,the specificity is 99.9% the positive predictive value is 94.3%,the negative predictive value is 99.5%, the accurate is 99.6%, the positive likelihood ratio is 822,and the negative likelihood ratio is 0.178。Conclusion A normalization systemic prenatal ultrasonographic examination in the second-trimester pregnancy is important for prenatal diagnosis of congenital malformations, which plays a very significant role in decreasing fetal birth defects and improving new born population quality.