AIM: To observe the clinical efficacy and safety of vincamine sustained release capsules on non- arteritic anterior ischemic optic neuropathy ( NAION) . · METHODS: Patients who were diagnosed with monocular onset NAION in acute stage from January to September 2015 were divided into two groups. Routine treatment such as steroid pulse therapy and neurotrophic treatment were given to all the patients. Vincamine was added to the treatment group patients with 30mg twice a day for 3mo. The best corrected visual acuity ( BCVA), mean deviation ( MD) of visual field, retinal nerve fiber layer ( RNFL ) , ganglion cell complex ( GCC ) , pattern visual evoked potential ( PVEP ) and OCT results were analyzed before and after the treatment. ·RESULTS:Totally 42 eyes of 42 patients were enrolled in our study. There were 27 patients in the treatment group, aged from 33 to 79 years old, the average value was 55. 55± 11. 83 years old. The control group has 15 patients, aged from 40 to 70 years old, the average value was 55. 71 ± 10. 06 years old. There were no statistical differences between the two groups in the baseline. After 3mo of the treatment, MD value of the two groups were lower compared with the baseline, the difference was statistically significant in the treatment and control group respectively (t= 2. 342, 2. 692; P = 0. 027, 0. 041). The difference of PVEP amplitude and potential of the two groups before and after the treatment were not statistically significant. The thickness of retinal nerve fiber layer and the ganglion cell complex were all lower than the baseline, and the difference was statistically significant (P<0. 001). The treatment of the two groups were both effective, the treatment group has better treatment effect than the control group. Adverse events related to the treatment of vincamine had not been found. ·CONCLUSION:Vincamine is helpful in the treatment of non-arteritic anterior ischemic optic neuropathy.

OBJECTIVE: To investigate the predictive value of cervical length（CL）changes in spontaneous preterm birth（SPTB）in twin pregnancies in the second and third trimesters of pregnancy.METHODS: A retrospective analysis was made of 166 cases of twin pregnant women who underwent transvaginal ultrasound to measure CL during the second trimester of pregnancy（20~25 weeks）and the third trimester of pregnancy（28~32 weeks）from January 2014 to December 2017 in the Third Hospital of Peking University and Tongzhou Maternal and Child Health Hospital of Beijing.Evaluate the predictive value of CL changes in SPTB before 32 and 34 weeks.The area under the receiver-operating characteristics（ROC）curve was compared by bootstrap method.Assessment of the value of CL in the third trimester of pregnancy and CL in the second trimester of pregnancy alone in predicting SPTB before 32 and 34 weeks.RESULTS: Of the 166 cases,90 were full-term delivery and 76 were premature delivery.The median CL of mid and late pregnancy was 34 mm and 29 mm respectively,and it was 35.5 mm and 31 mm,and in full-term delivery.32.5 mm and21 mm in premature delivery,respectively.There were significant differences among the three groups（All P<0.001）.According to whether the shortening of CL was more than 20%,they are divided into shortening group（CL shortening more than 20%,78 cases）and stabilizing group（no shortening of CL or shortening less than 20%,88 cases）.The preterm birth rate of shortening group was 2.22 times and 1.85 times higher than that of stabilizing group before 32 weeks and 34 weeks,but there was no significant difference.Of 40 cases with CL≤ 25 mm,there were 34 cases in shortening group,6 cases in stabilizing group.Excluding these twin pregnant women,the preterm birth rate in the shortening group increased by 7.58 times and 2.09 times than that in the stabilizing group before 32 weeks and 34 weeks.There was a significant difference in the preterm birth rate between the shortening group and the stabilizing group before 32 weeks（P=0.049）.The area under ROC curve of preterm birth predicted by CL in late pregnancy was increased compared with that in mid-pregnancy before 32 weeks and 34 weeks,but the difference was not statistically significant.CONCLUSION: In twin pregnancies,the CL shortening ≥ 20% at 28~32 weeks of gestation increases the risk of preterm birth before 32 weeks;with CL>25 mm and CL shortening≥ 20%,it can better predict preterm birth before 32 weeks.

Objective To study the effect and mechanism of estradiol (E