Susceptibility-weighted imaging (SWI) is a high resolution, three-dimensional gradient echo T 2* sequence magnetic resonance technique. It uses the different susceptibilities between tissues to display the susceptibility image, which is extremely sensitive to paramagnetic substance such as deoxyhemoglobin and blood breakdown substances. In the acute stage of ischemic stroke, SWI can effectively evaluate the severity of the disease, guide the treatment plan, and predict the clinical outcome. This article reviews the research progress of SWI in the acute phase of ischemic stroke.

Objective:To improve the health education program for patients with ulcerative colitis (UC) through action research method to explore its effect on disease knowledge and self-nursing ability of patients.Methods:In October 2018, 72 UC patients who were treated in Outpatient Department of Gastroenterology in the First Affiliated Hospital of Zhengzhou University in the past 3 months were selected as research objects by the convenient sampling method. According to the random number table, they were divided into the control group and the observation group, with 36 cases in each group. The control group was given routine health education, while the observation group used the action research method as the theoretical basis to continuously improve and implement health education strategies. Before the intervention and 4 months after the intervention, mastery of disease knowledge and self-nursing ability of patients in the two groups were compared.Results:There was no statistically significant difference in the scores of disease knowledge and self-nursing ability between the two groups before intervention ( P>0.05) . After the intervention, the scores of general knowledge, dietary knowledge, treatment knowledge and total score of disease knowledge of the observation group were all higher than those of the control group, and the differences were statistically significant ( P<0.05) . After the intervention, the scores of three dimensions of self-concept, self-nursing responsibility and health knowledge level and total score of self-care ability in the observation group were higher than those of the control group, and the differences were statistically significant ( P<0.05) . Conclusions:The health education strategy based on action research method can improve the disease knowledge and self-care ability of patients with ulcerative colitis, which can be applied to clinical practice to improve the quality of nursing.

Vascular recanalization is an important treatment method for acute ischemic stroke. Antiplatelet drugs combined with intravenous thrombolysis and endovascular therapy have become the research hotspots in recent years. Platelet glycoprotein Ⅱb/Ⅲa receptor antagonist is a new class of antiplatelet drugs that work by inhibiting the last common pathway in the platelet aggregation process. Its safety and effectiveness in the treatment of acute coronary syndrome have been proven, but its application in patients with acute ischemic stroke is still in the exploratory stage. This article reviews the application of tirofiban in the treatment of acute ischemic stroke reperfusion.

Objective:To analyze the epidemiological and clinical characteristics of imported COVID-19 cases after SARS-CoV-2 vaccination and to provide evidence for the prevention and control of COVID-19.Methods:The imported COVID-19 cases in Chengdu as of April 15, 2021 were divided into the vaccinated group and unvaccinated group according to the history of SARS-CoV-2 vaccination. The epidemiological and clinical data of the cases were collected retrospectively, and the differences in epidemiological and clinical characteristics of the two groups were compared. Laboratory tests consisted of nucleic acid test, clinical index test, serum antibody test and lymphocyte test. Software WPS2019 was used for data management and software R 4.0.3 was used for statistical analysis.Results:A total of 75 COVID-19 cases were included in the analysis, in which 20 had received SARS-CoV-2 vaccination and only 4 with clinical symptoms, 55 patients did not receive SARS-CoV-2 vaccination, and 16 had clinical symptoms. In vaccinated group, the first injection time of vaccination ranged from July to November 2020, and 10 cases received two doses of vaccine simultaneously and 10 cases received two doses of vaccine at intervals of 14-57 days. The intervals between the completion of vaccination and the onset ranged from 87 days to 224 days. The differences in classification and clinical type between the two groups were significant. Significant differences were observed in case classification and clinical type between vaccinated group and unvaccinated group ( P<0.05). The vaccinated group had a relatively high proportion of asymptomatic infections (40.00%, 8/20), while mild infections were mainly observed in the unvaccinated group(76.36%,42/55). The differences in Ct values (ORF1ab gene and N gene) at the diagnosis were not significant between vaccinated group and unvaccinated group ( P>0.05), similar results were also observed in lymphocyte subtypes, procalcitonin and C-reactive protein level comparisons. Serum amyloid A level was higher in unvaccinated group than in vaccinated group ( P<0.05). However, the SARS-CoV-2 related serum antibody of IgM, IgG and total antibody levels were significantly higher in vaccinated group ( P<0.05). Conclusions:Risk of infection still exists with SARS-CoV-2 after vaccination, which can facilitate the production of specific serum antibody of IgM and IgG when people are exposed to the virus. It has a certain protective effect on SARS-CoV-2 infected persons. Vaccination can reduce the clinical symptoms and mitigate disease severity.

Objective To explore the association between peripheral retinal defocus and myopia in adolescents.Methods This study encompassed 192 adolescents(192 right eyes),aged between eight and fifteen years,who sought treatment at Ineye Hospital of Chengdu University of TCM from October 2022 to April 2023.Based on the spherical equiva-lent(SE),the patients were divided into three groups:Emmetropia(E),low myopia(LM),and moderate myopia(MM),with each group comprising 64 patients(64 right eyes).After mydriatic refraction,the SE values were documen-ted.Ocular biological parameters,including axial length(AL),central corneal thickness(CCT),lens thickness(LT),and keratometry values(K1,K2),were obtained using IOL Master 900.Multispectral refraction topography was employed to measure the retinal defocus:positive values indicated hyperopic defocus,while negative ones represented myopic defocus.With the macular fovea as the center,the total retinal defocus value was recorded as TRDV.The ring partition(eccentrici-ty)was divided into 0°-10°、＞10°-20°、＞20°-30°、＞30°-40°、＞40°-53°,which was recorded as RDV-0°-10°,RDV-10°-20°,RDV-20°-30°,RDV-30°-40°,and RDV-40°-53°,respectively;the quadrants were recorded as RDV-Superior(RDV-S),RDV-Inferior(RDV-I),RDV-Temporal(RDV-T)and RDV-Nasal(RDV-N),respectively.The variance of RDV across different ranges was analyzed using One-Way ANOVA and non-parametric tests.The associations between SE,AL and RDV were examined using Spearman and Pearson correlation analyses.Results The RDV-20°-30°,RDV-30°-40° and RDV-40°-53° of Groups E,LM and MM all exhibited hyperopic defocus.Statistically significant differences were identi-fied in TRDV,RDV-10°-20°,RDV-20°-30°,RDV-30°-40°,RDV-40°-53°,RDV-S,RDV-T and RDV-N among the three groups(all P＜0.05).TRDV,RDV-20°-30°,RDV-30°-40°,RDV-40°-53°,RDV-S,RDV-T,and RDV-N were found to be negatively correlated with SE while positively correlated with AL(all P＜0.05).RDV-0°-10° and RDV-I were uncorrelated with both SE and AL(all P＞0.05);RDV-10°-20° was positively correlated with AL(P=0.012)while uncorrelated with SE(P=0.233).Conclusion Peripheral retinal hyperopic defocus tends to advance with escalating eccentricity and my-opia.Peripheral retinal defocus is asymmetrical.Peripheral(10°-53°),superior,nasal and temporal retinal defocus may be closely related to the development of myopia.