Objective To improve the diagnosis and differential diagnosis of mediastinal cysts.Methods 36 patients with mediastinal cyst proved by surgery and pathology were collected, and CT findings were analyzed retrospectively.Results In all 36 cases,CT defined the masses with clear margin, thin wall and fluid-like density content which had no enhancement after intravenous contrast administration. There were neurenteric cyst(n=1), bronchial cyst(n=12), esophageal cyst(n=2), pericardial cyst(n=5), dermoid cyst(n=7), lymphangioma(n=4), thymic cyst(n=4) and non-special cyst(n=1). Conclusion The diagnosis of mediastinal cyst and differential diagnosis from other cystic lesions can be made according to the characteristics on plain and post-contrast CT scans.

Objective To explore the feasibility of in vitro biological soft tissue imaging by using synchrotron radiation phase contrast CT.Methods Three samples of resected human cardia,two samples of resected human esophageal carcinoma and esophagus,as well as two samples of middle cerebral artery tissue extracted from corpses were fixed and airdried at room temperature for synchrotron radiation phase contrast CT imaging.The images of soft tissue structures were observed and compared with pathological findings.Results The images of synchrotron radiation phase contrast CT showed three-layer structure of cardia and esophagus,mucous,submucosa and muscular layer.The surface of mucous layer was smooth.The images of esophageal carcinoma showed cancerous tissue infiltrating esophageal wall.The wall and lumen of cerebral arteries could be also clearly displayed.Conclusion Synchrotron radiation phase contrast CT imaging can clearly display fine structures of in vitro biological soft tissue.

BACKGROUND:Coptis chinensis can clear heat,dry dampness,relieve fire,and detoxify.Coptis chinensis and its components have a significant protective effect on cerebral ischemia.The action mechanism of anti-cerebral ischemia of Coptidis Rhizoma Alkaloids was explored based on network pharmacology and transcriptome sequencing. OBJECTIVE:Based on the study of the protective effects of Coptidis Rhizoma Alkaloids on cerebral ischemia of rats,the action mechanism of Coptidis Rhizoma Alkaloids intervention in cerebral ischemia was investigated by using network pharmacology and transcriptome sequencing technology. METHODS:The SD rats were randomly divided into sham operation group,ischemia/reperfusion group,positive drug group,and Coptidis Rhizoma Alkaloids group.The ischemia/reperfusion model of middle cerebral artery occlusion was prepared by modified thread method in the latter three groups.No thread was inserted and the other operations were the same in the sham operation group.TTC staining,Longa 5 neurological deficient score,hematoxylin and eosin staining,and Nissl staining were used to evaluate the protective effect of Coptidis Rhizoma Alkaloids on ischemia/reperfusion model rats.Transcriptome sequencing was performed on the brain tissues of rats in sham operation group,ischemia/reperfusion group,and Coptidis Rhizoma Alkaloids group.Differentially expressed genes,gene Ontology analysis,Kyoto encyclopedia of genes and genomes analysis,and Correlation Analysis of Transcriptomics and Network Pharmacology were used to elucidate the effect of Coptidis Rhizoma Alkaloids on cerebral ischemia.Finally,ELISA and immunofluorescence staining were used to verify the key targets of Coptidis Rhizoma Alkaloids in the intervention of cerebral ischemia. RESULTS AND CONCLUSION:(1)Coptidis Rhizoma Alkaloids treatment decreased the Longa 5 neurological deficit scores and cerebral infarction area of ischemia/reperfusion model rats,increased the number of neurons and Nissl bodies.(2)Differentially expressed gene after Coptidis Rhizoma Alkaloids treatment analyzed by functional enrichment analysis of gene ontology includes biological processes such as inflammatory reaction and positive regulation of mitogen-activated protein kinase cascade.The enrichment analysis of Kyoto gene and genome encyclopedia analysis pathway mainly involves interleukin-17 signaling pathway,neuroactive ligand-receptor interaction,cyclic adenosine-3′,5′-mconophosphate signaling pathway and so on.(3)Analysis of transcriptomics showed that the main genes regulated by Coptidis Rhizoma Alkaloids were prostaglandin endoperoxide synthase 2,brain derived neurotrophic factor,and transient receptor potential A1.(4)Network pharmacology analysis revealed that nine components in Coptidis Rhizoma Alkaloids may exert their effects by associating with 87 targets related to prostaglandin endoperoxide synthase 2,brain derived neurotrophic factor,and transient receptor potential A1.(5)ELISA and immunofluorescence staining results further confirmed that Coptidis Rhizoma Alkaloids regulated the expression of prostaglandin endoperoxide synthase 2,brain derived neurotrophic factor,and transient receptor potential A1.(6)It is concluded that Coptidis Rhizoma Alkaloids treatment can significantly improve the injury in ischemia/reperfusion model rats,possibly by regulating prostaglandin endoperoxide synthase 2,brain derived neurotrophic factor,and transient receptor potential A1.

Objective To investigate the prognosis of middle-aged and elderly patients with aspiration pneumonia and related influencing factors in integrated medical and elderly care institutions. Methods A total of 604 elderly patients with aspiration pneumonia were selected from integrated medical and elderly care institutions from January 2016 to December 2020. The prognosis of the patients was counted, and the prognostic factors were analyzed by univariate and multivariate logistic regression equations. The receiver operating characteristic (ROC) curve and area under the curve (AUC) were used to analyze the predictive value of logistic regression model for the prognosis of elderly patients with aspiration pneumonia. Results Univariate analysis showed that Alzheimer's disease, severe pneumonia, ability of daily living (ADL), and the number of rescues were related to the prognosis of elderly patients with aspiration pneumonia (P<0.05). Logistic regression model showed that the death risk of patients with Alzheimer's disease was 2.883 times higher than that of patients without Alzheimer's disease, the death risk of patients with severe pneumonia was 3.292 times higher than that of patients without severe pneumonia, the death risk of patients with severe dependence in ADL was 3.719 times higher than that of patients with mild dependence, the death risk of patients with moderate dependence in ADL was 2.558 times higher than that of patients with mild dependence, and the death risk of patients with rescue times ≥ 2 times was 2,922 times higher than that of patients without rescue times (P < 0.05). Logistic regression equation: logistic (P=-8.264+2.883)×Alzheimer disease ≥60 years old + 3.292×severe pneumonia + 3.719×severe dependence in ADL+2.558×moderate dependence in ADL +2.922× number of rescues. The predicted prognosis AUC of elderly aspiration pneumonia was 0.907 (95%CI: 0.848-0.966). When logistic(P>12.97), the predictive value was the best, with the predictive sensitivity being 83.87%, and the specificity being 84.15%. Conclusion Alzheimer's disease, severe pneumonia, moderate and severe dependence in the ability of daily living and rescue times ≥ 2 are related to the prognosis of middle-aged and elderly patients with aspiration pneumonia in the integrated medical and elderly care institutions, which can be used as a prognostic plan for clinical treatment and nursing management. At the same time strengthening the intervention of patients with the above characteristics will help to promote the improvement of prognosis.