Objective To investigate the clinical value and characteristics of color Doppler ultrasound in the diagnosis of fetal ductus arteriosus narrow.Methods 22 pregnant women were screened by ultrasound in the hospital (the disease group),In the same period,50 cases of fetus in pregnant women were selected as control group,The arterial catheter inside diameter,systolic and diastolic velocity flow were compared,and different facets of the ductus arteriosus in ultrasonography were observed.Results The ductus arteriosus diameter of disease group gestational age (28-36 weeks) and gestational age (＞ 36 weeks) were (2.25 ± 0.68) mm and (4.29 ± 0.14) mm,which were significantly lower than those in the control group(t =3.01,2.98,all P ＜ 0.05).The systolic flow rate of disease group gestational age (28-36 weeks) was (0.39 ± 0.20) m/s,which was significantly higher than (0.32 ± 0.31) m/s in the control group (t =2.96,P ＜ 0.05).The systolic and diastolic flow velocity of disease group gestational age (＞ 36 weeks) were (0.42 ± 0.17) m/s,and (0.24 ± 0.08) m/s,which were significantly higher than those of the control group (t =2.91,3.04,all P ＜ 0.05).The color Doppler ultrasound of fetal ductus arteriosus narrow showed arterial catheter lumen thinner,blood flow velocity was significantly faster,including five cases of arterial stenosis showed right atrium,right ventricle; 3 cases showed the right atrium and right ventricle increased,with severe tricuspid regurgitation.Conclusion Color Doppler ultrasound can identify fetal ductus arteriosus braid and can objectively and comprehensively assess it.It has important diagnostic value for fetal ductus arteriosus stenosis.

Objective To investigate and analyze the diagnostic imaging features of patients with far lateral lumbar disc herniation (FLLDH) by CT and MRI.Methods 38 patients with FLLDH were diagnosed,and its radiology imaging diagnosis and clinical characteristics were analyzed.The main positive results of intervertebral disc herniation segment by CT and MRI scanning and its imaging features were observed.Results The positive of CT scans was 94.74％ (36/38),MRI scans was 100％ (38/38),the difference was not statistically significant (x2 =2.89,P ＞0.05) ;disc segments were mainly in L3-4 and L4-5 segments respectively,MRI scans were 34.21％ (13/38) and 39.47％ (15/38),CT scans were 3 1.58％ (12/38) and 39.47％ (15/38) ;22 cases with hummocky,8 cases with semicircular,irregular triangular shape and 3 cases respectively ;4 cases with foramen medial,18 cases with lateral foramen,14 cases of mixed type;prominence of ＜ 3 mm was 13 cases,20 cases with 4 to 7 mm,8 cases with more than 7mm.Conclusion CT and MRI examination can accurately diagnose FLLDH and judge its location,extent and clinical timely treatment has important clinical application value.