Objective To investigate the safety and effectiveness of endovascular stent place-ment in the treatment of symptomatic intracranial arterial stenosis(sICAS).Methods A total of 100 patients with sICAS were selected and randomly divided into control group and study group using a random number table method,with 50 patients in each group.The control group received standard pharmacological therapy,while the study group underwent endovascular stent placement.The in-tracranial artery stenosis rate,neurological function[assessed by the National Institutes of Health Stroke Scale(NIHSS)score],activities of daily living[assessed by the Activities of Daily Living(ADL)score],and cerebral blood perfusion indicators[peak systolic velocity(PSV)and pulsatility index at the stenotic segment]before and 14 days after treatment were compared between the two groups.Additionally,the incidence of adverse reactions was compared.Results After treatment,the intracranial artery stenosis rates were lower in both groups compared to before treatment,and the study group was lower than the control group(P＜0.05).The NIHSS scores were lower in both groups after treatment compared to before treatment,and the study group was lower than the control group(P＜0.05).After treatment,the ADL scores were higher in both groups compared to before,and the study group was higher than the control group(P＜0.05).After treatment,both PSV and the pulsatility index were lower in both groups compared to before treatment,and they were lower in the study group than in the control group(P＜0.05).The incidence of adverse reactions was lower in the study group than in the control group(P＜0.05).Conclusion Endovascular stent placement is effective in treatment of patients with sICAS,and it can significantly reduce the intracranial artery stenosis rate,improve neurological function and activities of daily living,demonstrating high safety.

Objective:To investigate the prevalence of norovirus and the correlation between norovirus infection and stool traits and clinical symptoms in children with acute gastroenteritis during 2021-2022.Method:A total of 2 195 anal swab samples were collected from cases of acute gastroenteritis in Beijing Children 's Hospital Affiliated to Capital Medical University from January 2021 to December 2022. PCR fluorescent probe assay was performed to detect norovirus，the clinical information and test results were performed by statistical analysis. Results:The detection rate of norovirus was 19.09%（419/2 195）in 2 195 children. The detection rates of male and female were 17.80%（244/1 371）and 21.24%（175/824），respectively，with statistically significant differences between genders（ χ2=3.945, P<0.05）. The positivity rate of noroviruses was higher in aged 1 month to 3 years［29.09%（64/220）~40.69%（94/231）］，especially in 1 year［40.69%（94/231）］. The norovirus detection rate ranged from 2.44%（2/82）to 35.84%（62/173）in different months，with a high detection rate between January and March，higher in the winter and spring［28.36%（150/529），21.07%（146/693）］，showing a clear seasonal distribution.Clinical symptoms of both vomiting and diarrhea were significantly more common among norovirus positive than negative children，the difference was statistically significant（ χ2=57.29, P<0.05）. Conclusion:In the high incidence season of winter and spring，for infants and young children aged 1 month to 3 years with diarrhea accompanied by vomiting symptoms，especially those aged 1 year，it is recommended to undergo norovirus related testing in time. Early treatment and isolation measures should be taken for diagnosed children to reduce cross infection and prevent outbreaks.