The low diversity and large inter-individual differences of children′s intestinal microbiota are associated with antibiotic-resistant bacteria colonization and infection. Therefore, rapid and accurate detection of intestinal microbiota dysbiosisis of great significance for the prevention and treatment of intestinal infection and the rational use of antibiotics. The current intestinal pathogens detection methods have either poor accuracy or low throughput. The developing multi-omics technology can accurately detect known and unknown pathogens and can also be used to evaluate the intestinal microbiota state comprehensively. This technology will be widely applied in the detection of intestinal infections in children.

OBJECTIVE:To establish drug safety performance indicator system in Beijing,and to provide reference for evaluat-ing work quality of administration department and drug market safety reasonably. METHODS:Through literature survey,expert brainstorming and maximum difference scaling,the indicators of drug safety performance evaluation system in Beijing were select-ed,and internet questionnaire survey was conducted among 20 regulators by using SSI Web software. The weight of each indicator was analyzed. RESULTS & CONCLUSIONS:4 factors of drug safety performance have been selected involving 27 indicators,ig. Results of drug sampling test(Oc)which reflect drug market safety directly;results of special drug sampling test(So)which mea-sure the quality of essential medicine;drug sampling operation standard (Na) which measure the completion of drug sampling by procedure or plan;rationality of drug sampling (Ra) which guarantee the rationality of sampling procedure and representativeness of sampled drugs. Finally,20 indicators are identified by experts. The weight of 4 factors are 21%,14%,40% and 25%,respec-tively. Established drug safety performance evaluation system can achieve quantitative check of drug supervision departments,and dispose several problems as rely on subjective factor greatly,lack of objective and uniform standard,only check the results. It pro-vides reference for the formulation of drug safety performance evaluation indicators in other provinces,cities and municipalities.

Objective To investigate the expression of E-cadherin(E-cad),N-cadherin(N-cad),β-catenin (β-cat),which are the markers of Epithelial-mesenchymal transition and analyze their relationships with the clinicopathological features and the prognosis of the laryngeal squamous cell carcinoma.Methods The expression levels of E-cad,N-cad,β-cat in 76 tumor tissues and their corresponding adjacent normal laryngeal tissues were determined by immunohistochemistry method.Relationships between the proteins' expression and clinicopathological features were analyzed.Survival curves were calculated using the Kaplan-Meier method.Differences in the survival rates were analyzed by the log-rank test among different expression groups.Cox's regression model was used to examine the independent predictor of the prognosis of the laryngeal cancer.Results The expression levels of E-cad,N-cad,β-cat in tumor tissues and adjacent normal tissues were statistically significant (P ＜ 0.001).The expression level of E-cad and β-cat in the laryngeal carcinoma was related to lymph node metastasis,clinical pathological stage and differentiation degree (P ＜ 0.05),while N-cad expression level was associated with clinical stage and differentiation degree (P＜0.05).The expression of E-cad was correlated with the expression of β-cat (P =0.001),and the expression of N-cad was correlated with β-cat (P =0.02),but the expression of E-cad was not correlated with N-cad.There were four subgroups of patterns of E-cad and N-cad expression:E-cad (+)/N-cad (-),E-cad (+) /N-cad (+),E-cad (-) /N-cad (-),E-cad (-) /N-cad (+).The expression level of each group was related to the clinical pathological stage and differentiation degree (P ＜ 0.05).The expression level of E-cad/β-cat was associated with lymph node metastasis,clinical pathological stage and differentiation degree (P ＜ 0.01).Log-rank analysis showed that the prognosis of negative and positive groups was statistically different (P ＜ 0.05),and the combined analysis showed that the prognosis of E-cad/N-cad or E-cad/β-cat group was significantly different (P ＜ 0.01).Cox's regression model analysis showed that the clinical stage and β-cat were independent predictors of the prognosis of laryngeal carcinoma.Conclusions The low expression of E-cad,high abnormal expression of N-cad and β-cat played an important role in the occurrence and development of laryngeal carcinoma.It can provide a reference for evaluating clinical prognosis.The clinical pathological stage and β-cat can be used as independent predictors for the prognosis of laryngeal carcinoma.

Objective:To observe and analyze the rate of visual acuity progression and binocular symmetry in patients with choroideremia (CHM).Methods:A single-center retrospective longitudinal cohort study. From April 2009 to August 2022, 38 eyes of 19 patients diagnosed with CHM through clinical and genetic testing at the Department of Ophthalmology, Peking Union Medical College Hospital, were included in this study. All patients underwent at least 2 follow-up visits with a minimum interval of 1 year between visits, and binocular best-corrected visual acuity (BCVA) results were recorded at each follow-up visit. Decimal visual acuity was converted into logarithm of the minimum angle of resolution (logMAR) for analysis. The patient group consisted of 19 males from 16 unrelated families. The age at initial visit was (39.52±13.24) years, with a (2.63±1.61) follow-up visits over a duration of (4.95±2.68) years. A total of 50 binocular BCVA data were included. Annual progression rate of visual acuity was calculated based on longitudinal and cross-sectional data. Spearman correlation coefficient and Bland-Altman method were used to evaluate the binocular symmetry.Results:The rate of visual acuity progression was (0.095±0.148) logMAR units/year based on longitudinal data and (0.018±0.009) logMAR units/year based on cross-sectional data. The binocular symmetry for BCVA of the baseline values was strong; however, the binocular symmetry of progression rates for BCVA was moderate. Spearman correlation analysis showed that binocular symmetry in baseline BCVA was high ( r=0.881, P<0.001). The symmetry of binocular vision progression rates based on longitudinal data was moderately symmetric ( r=0.528, P=0.020). Bland-Altman analysis showed that 94.7% of binocular baseline BCVA differences were within 95% confidence interval ( CI) of 95% limit difference (LOA), indicating good symmetry of binocular baseline BCVA. The number of binocular BCVA progression rate differences within 95% CI of 95%LOA was 89.5%, suggesting moderate symmetry in binocular BCVA progression rate. The results of Spearman correlation coefficient and Bland-Altman analysis of binocular symmetry were basically consistent. Conclusions:The rate of visual acuity progression of patients with CHM based on longitudinal and cross-sectional data is (0.095±0.148) and (0.018±0.009) logMAR units/year, respectively. Cross-sectional data from patients of different ages should not be used to infer the progression rate of the natural history. Binocular eyes with highly symmetrical baseline visual acuity may differ in the rate of visual acuity progression.

Objective:To investigate the Chinese anesthesiologist′s proficiency, training experience and needs of flexible bronchoscope-guided awake flexible bronchoscopy intubation (AFBI) using a questionnaire method.Methods:The cluster sampling was used, and self-designed questionnaires that addressed 54 questions in 5 categories were distributed through WeChat and online platforms. The survey took one month, and the answers were automatically recorded by the WeChat server.Results:A total of 1 250 anesthesiologists participated in the survey in 30 provinces of China, 9 of them were not anesthesiologists, and 1 241 (99.28%) questionnaires were validated. In the valid questionnaires, 52.70% (654) of the anesthesiologists were from tertiary hospitals, and 74.78% (928) of the anesthesiologists were attending physicians or above, only 7.57% (94) of the anesthesiologists had sufficient confidence in AFBI. Twenty-five point two two percent (313) of the anesthesiologists preferred fiberoptic intubation as the first tool when dealing with the anticipated difficult airway. Forty-eight point one one percent (597) of the anesthesiologists had implemented AFBI. Among them, 80.74% (482) had experienced unsuccessful AFBI practices. Eight hundred and ninety-four anesthesiologists had received AFBI training, and the most common AFBI training strategy was theoretical lectures. In addition, the degree of satisfaction regarding the theoretical lectures quality, technical training, clinical practice relativity and non-technical skills training was 21.47% (192), 14.32% (128), 12.3% (110) and 17.90% (160), respectively. The degree of satisfaction with all the 4 training elements mentioned above was 7.27% (65).Conclusions:The awareness and practice of Chinese anesthesiologists in terms of clinical application of AFBI to treat difficult airways need to be strengthened at present, and the lack of high-quality AFBI training may be the key.