RESUMO
Objective To analyze the value of cerebral coronary view of nose tip deflection in screening fetal facial deformity in the first and second trimester. Methods All cases were divided into the 11～12+6 weeks, the 13 ～ 14+6 weeks and the 15 ～ 16+6 weeks undergone ultrasonographic examination on coronal view of nose tip deflection. The display of fetal facial structure and the detection rate of fetal facial malformation were analyzed. Results The fetal facial anatomic structures were clearly displayed. The median sagittal section ,eyes level coronal section ,retronasal triangle section ,or other sections were satisfactory in 4855 cases (97.10％). There was no Statistical difference in the display of fetal facial structures among the three groups. 69 fetus were found with facial malformations,including 31 fetus with facial malformations only,and 38 fetus combined with other abnormal struc-tures. The sensitivity,specificity,positive predictive value and negative predictive value were 93.24％,100％, 100％ and 99.90％ respectively. Conclusion The cerebral coronary view of nose tip deflection method has high detection rate and sensitivity,and is a reliable method for detecting fetal facial abnormalities in the first and second trimester.
RESUMO
Objective To analyze the value of cerebral coronary view of nose tip deflection in screening fetal facial deformity in the first and second trimester. Methods All cases were divided into the 11～12+6 weeks, the 13 ～ 14+6 weeks and the 15 ～ 16+6 weeks undergone ultrasonographic examination on coronal view of nose tip deflection. The display of fetal facial structure and the detection rate of fetal facial malformation were analyzed. Results The fetal facial anatomic structures were clearly displayed. The median sagittal section ,eyes level coronal section ,retronasal triangle section ,or other sections were satisfactory in 4855 cases (97.10％). There was no Statistical difference in the display of fetal facial structures among the three groups. 69 fetus were found with facial malformations,including 31 fetus with facial malformations only,and 38 fetus combined with other abnormal struc-tures. The sensitivity,specificity,positive predictive value and negative predictive value were 93.24％,100％, 100％ and 99.90％ respectively. Conclusion The cerebral coronary view of nose tip deflection method has high detection rate and sensitivity,and is a reliable method for detecting fetal facial abnormalities in the first and second trimester.