Objective To investigate the clinical value of prenatal ultrasonography in diagnosing fetal aortic atresia.Methods Ultrasound images of 9 cases with fetal aortic atresia confirmed by autopsy were retrospectively analysed and summarized.Results Fetal echocardiography showed ascending aorta and aortic arch were thin in seven cases and unclear in two cases.Color Doppler flow imaging showed fetal aorta no blood connection with left ventricle and reverse blood flow in aortic arch among all 9 cases.There were 6 cases associated with hypoplastic left heart syndrome,two cases associated with ventricular septal defect and well-developed left ventricle,one case complicated with complete atrioventricular septal defect.Nine cases were detected at average gestational age (26.0 ± 2.6) weeks,minimum gestational age was only 16 weeks pregnant.Conclusions Prenatal ultrasound diagnosis of fetal aortic atresia has important clinical value.Ascending aorta and aortic arch are thin or unclear,no blood flow connection between fetal aorta and left ventricle and reverse blood flow in aortic arch are major diagnostic evidences.Color Doppler flow imaging is helpful for early diagnosis.

Objective To explore the value of OSCE system combined with intelligent network in-formation platform in clinical skills assessment of obstetrics and gynecology. Methods 112 clinical medi-cal students who participated in the practice of gynecology and obstetrics in Second Military Medical Uni-versity in 2017 were randomly divided into the experimental group (network information OSCE) and the control group (traditional OSCE). The teaching results were evaluated by the questionnaire survey of teachers and students and the examination results as well. The statistical analysis was made with the Chi-square test and the t test respectively. Results According to the questionnaire survey of two skills assessment methods, the satisfaction index of the experimental group was higher than that of the control group in both teachers and students, and the difference was statistically significant (P<0.05). The total time of examination in the experimental group was lower than that of the control group, and the difference was statistically significant (P<0.05). The final total score and the results of case analysis and clinical operation examination of experi-mental group were all higher than those of the control group, but there was no statistical difference (P>0.05). Conclusion OSCE combined with the network information system has an unparalleled advantage in the assessment of the obstetrics and gynecology department. The system will promote clinical education of ob-stetrics and gynecology and the evaluation of the clinical ability of the medical students to a new height, which deserves popularization.