BACKGROUND: RT-Q medical biomembrane, the novel copolymer synthesized from lactic acid and hyaluronic acid, not only possesses the advantages of hyaluronic acid, such as multiple biological functions, excellent flexibility and biocompatibility, but also has the merits of polylactic acid fragments to be easily processed and transformed to membrane when encountering water. OBJECTIVE: To investigate the hemostatic effect of RT-Q medical biomembrane in rat external jugular vein hemorrhage model, and to evaluate its histocompatibility by locally applying it to rat muscle. DESIGN: Randomized controlled animal trial.SETTING: Department of Pharmacology, Department of Pharmacognosy, West China School of Pharmacy, Sichuan University.MATERIALS: 130 male Wistar rats aged 6 weeks, weighing 170-210 g, were selected. Eighty rats were used for evaluation of hemostatic effect, and the other fifty were used in biocompatibility experiment. Animal intervention met the animal ethical standard. RT-Q aerosol composed of DL-lactic acid and hyaluronic acid, α-cyanoacrylate, acetone (solvent), freon (propellant) and excipient aerosol composed of acetone and freon (propellant) (Batch number 20050311) were provided by Department of Pharmaceutics, West China School of Pharmacy, Sichuan University.α-cyanoacrylate medical adhesive(SUNCON medical adhesive) (Batch number 20050930) was produced by Beijing Suncon Medical Adhesive Science and Technology Development Co., Ltd. METHODS: Haemostatic effect: Eighty male rats were randomly divided into four groups, served as RT-Q, SUNCON (positive control), excipient group and non-treatment group (negative control), twenty in each group. After anesthesia was induced, external jugular vein of rats was exposed, and an approximately 0.6 cm incision was made to create hemorrhage. The bleeding areas were blotted by antiseptic gauze. After removing the gauze, the bleeding surfaces were immediately treated with RT-Q aerosol in the RT-Q group, excipient aerosol in the excipient group, 0.15 mL SUNCON medical adhesive in the SUNCON group, or no agent in non-treatment group, respectively. Then, injury surfaces were covered by gauze. In the non-treatment group, bleeding was left to naturally stop. Bleeding time and blood loss (gauze weight after hemostasia - that before hemostasia) were determined. Local histocompatibility: Rats were divided into A and B groups. Incision was made in rat post-leg muscle after anesthesia was induced. Left bleeding surfaces were treated with excipient aerosol, and right bleeding surfaces were treated with RT-Q aerosol in group A (n=30). The same incision as the group A was made, but no intervention was performed in the group B (n=20). Tissues were possessed and HE-stained for pathological observation under light microscope at days 1, 2, 3, 4, 5, 6, 7, 15, 23, 30 after the surgery. Effect of biomembrane on wound healing, degradation and toxicity to tissues surrounding injuries were observed. MAIN OUTCOME MEASURES: Bleeding time and blood loss in hemostatic experiment; wound healing, biodegradation and toxicity to tissues surrounding injuries in local histocompatibility experiment. RESULTS: 130 rats were involved in the result analysis. Histopathologic examination showed RT-Q membrane had no effect of promoting or delaying wound healing. Membrane formed by RT-Q aerosol began to degrade on the 15th day, absorbed completely during 3-4 weeks, and had no toxicity to surrounding tissues. Bleeding time and blood loss were reduced in the RT-Q group than in the non-treatment group and the excipient group (P < 0.01). There was no significant difference between the RT-Q group and the SUNCON group (P > 0.05).CONCLUSION: RT-Q medical biomembrane as α-cyanoacrylate medical adhesive has significant hemostatic effects on topical bleeding, and possesses good histocompatibility.

Objective To explore the status of job burnout of medical staffs in minority border areas. Methods A total of 906 medical personnel from Pu'er hospitals in Yunnan Province were as-sessed with Maslach Burnout Inventory General Survey (MBI-GS) by t test, descriptive statistics, chi-square test, ANOVA and LSD-t pairwise comparison. Results ①The emotional exhaustion, cynicism and reduced personal accomplishment of medical staffs in minority border areas (1.55±1.40, 0.99± 1.29, 2.47±1.98) are significantly lower than general areas (P=0.000, 0.010, 0.000); ②emotional ex-haustion, cynicism and Maslach Burnout Inventory (MBI) total points of different levels of hospital medi-cal staff, the score of which in descending order are:municipal, county and township (town) levels (P=0.000, 0.000, 0.000); ③Female medical personnel's emotional exhaustion and cynicism are scored significantly higher than males medical staff (P=0.000, 0.025); ④The scores of emotional exhaustion, cynicism, reduced personal accomplishment and MBI total points of Bachelor medical staff are signifi-cantly higher than those of colleges as well as secondary schools and below (P=0.000, 0.000, 0.000, 0.012); ⑤The scores of reduced personal achievement of Lahu medical staff are higher than those of other ethnic groups (P=0.009). Conclusion In medical staffs in minority border areas there exists a certain extent of job burnout, which presents differences among genders, educational background, hos-pitals and ethnic groups.

Epstein-Barr virus (EBV) is a common viral pathogen in children.EBV infection can cause childhood tumors, immune-related diseases and respiratory-related diseases.The proportion of EBV infection in Chinese children is high and the age of primary infection is early.Its pathogenesis is closely related to B lymphocytes, natural killer cells and gene defects.Clinical EBV infection is not only associated with childhood tumors and immune-related diseases, but also causes respiratory-related diseases that deserve more attention.

Next-generation sequencing (NGS), also known as high-throughput sequencing, is more efficient compared with Sanger sequencing that has become the standard method of clinical DNA sequencing, and can obtain a large amount of information in a relatively short time at a lower cost.NGS has broad prospects in such aspects as diagnosing the pathogen of lower respiratory tract infection in children, identifying the pathogen of cross-infection in hospital, drug resistance research and vaccine development.It is still worth conducting further studies on the approach to improve the specificity and sensitivity of diagnosis and to optimize NGS.

Objective:To explore the application effect of intelligent referral mode in examinees with major positive results in physical examinations in a health medical center.Methods:A cross-sectional study was conducted from January 2022 to December 2023 with subjects receiving physical examinations. Those subjects with major positive results from January 2022 to December 2022 in the Health Medical Center of the Second Affiliated Hospital of Chongqing Medical University were selected as the routine referral group, and those with major positive results from January 2023 to December 2023 were selected as the intelligent referral group. The routine referral group received routine health education from the chief inspector in the health medical center, suggesting them to get outpatient consultation. On the basis of ordinary referral, the intelligent referral group received health education from a referral team composed of nurses and specialists based on internet technology to digitally integrate and share patients′ medical records, examination results, imaging data and other medical information. The subects in the intelligent referral group were provided with a green channel for outpatient consultation and medical treatment immediately. The visiting rate, hospitalization rate, average visiting time, and overall satisfaction of the subjects after being notified of abnormal results were compared between the two groups. According to the positive results, the subjects were divided into four subgroups: ultrasound examination group, radiology group, clinical laboratory group and blood pressure group.Results:After the notification, there were significant differences in hospital visit rate (84.8% vs 67.2%, χ 2=168.4), hospitalization rate (48.8% vs 36.5%, χ 2=17.80), average visit time (116 min vs 301 min, Z=-15.82), and overall satisfaction score (9.70±0.62 vs 8.29±1.26, t=-33.47) between intelligent referral group and general referral group (all P<0.01). The classification statistics of major abnormal results showed that the consultation rates in subjects with ultrasound, radiology, clinical laboratory and blood pressure abnormities in the intelligent referral group were all higher than those in the general referral group (87.9% vs 70.4%, 89.9% vs 70.6%, 80.6% vs 60.2%, 57.2% vs 41.3%, respectively; χ 2=41.91, 39.37, 19.37, 6.20, all P<0.05); the hospitalization rates in subjects with ultrasound, radiology and blood pressure abnormities in the intelligent referral group were all higher than those in the general referral group (66.8% vs 64%, 55.7% vs 42.2%, 18.7% vs 11.2%, respectively; χ 2=16.86, 11.91, 8.68, all P<0.05); the mean consultation times in subjects with ultrasound, radiology and clinical laboratory abnormities in the intelligent referral group were all significantly shorter than those in the general referral group (96 min vs 308 min, 110 min vs 300 min, 122 min vs 286 min, Z=-11.38, -9.27, -7.63, all P<0.01); the overall satisfaction scores in subjects with ultrasound examination, radiology, clinical laboratory and blood pressure abnormities in the intelligent referral group were all higher than those in the general referral group (9.69±0.60 vs 8.36±1.21, 9.09±0.62 vs 8.26±1.27, 9.74±0.69 vs 8.25±1.31; 9.68±0.59 vs 8.34±1.35, respectively; t=-18.47, -18.52, -14.42, -11.77, all P<0.01). Conclusions:The application of intelligent referral mode can improve the visiting rate and hospitalization rate of examinees with major positive results of physical examination, shorten their visiting time, and thus improve their satisfaction.

Objective: To investigate the prospective effects of the consumption of protein and animal foods before menarche on the age at menarche among Chinese girls. Methods: This paper was based on the data collected in the China Health and Nutrition Survey(CHNS) from 1997 to 2015. A total of 683 girls aged 6 and over who had completed information on age at menarche, height, weight, per capita annual household income, maternal education level and participated in at least one complete dietary survey within 1 to 4 years before menarche were included. Urban-rural stratified multivariable linear regression model was used to examine the effects of protein and animal foods intake before menarche on Chinese girls age at menarche in urban and rural areas. Results: After adjusted for total energy intake, body mass index standard deviation score and per capita annual household income, the consumption of meat before menarche was negatively associated with the age at menarche among rural Chinese girls(B=-0.003, P=0.00), but not among urban Chinese girls(B=0.002, P>0.05). Total protein, dairy, eggs and aquatic products intake before menarche were not associated with Chinese girls age at menarche in urban and rural areas(B=0.002, -0.001, 0.003, 0.000; 0.001, 0.001, -0.001, -0.003, P>0.05). Conclusion Higher intake of meat before menarche might lead to earlier menarche onset in rural Chinese girls. The consumption of total protein, dairy, eggs, and aquatic products before menarche did not affect the age at menarche in Chinese girls.

Objective:To explore the correlation between lean nonalcoholic fatty liver disease (NAFLD) and metabolic indicators in a young and middle-aged population undergoing physical examination.Methods:It was a cross-sectional study. A total of 8 250 individuals who underwent routine physical examinations at the Health Medical Center of the Second Affiliated Hospital of Chongqing Medical University from January to December 2021 and met the inclusion and exclusion criteria were selected as the research subbjects. The general examination, fasting blood glucose, blood lipids, liver function, renal function, and fasting color ultrasound examination results were analyzed retrospectively to assess the correlation between lean NAFLD and major metabolic indicators using independent sample t-test, chi-square test, and multivariable logistic regression. Results:The prevalence of lean NAFLD was higher in men than in women (50.7% vs. 49.3%, χ2=97.261, P<0.001). After stratifying the age of onset of lean NAFLD, the peak age of onset was found to be between 45 and 59 years, with the prevalence gradually increasing with age. When stratified by body mass index (BMI), the peak incidence of lean NAFLD was observed in individuals with a BMI of ≥20 and <23 kg/m 2, with the prevalence showing a significant upward trend as BMI increased. The systolic blood pressure, diastolic blood pressure, total cholesterol, triglyceride, low-density lipoprotein, fasting blood glucose, alanine aminotransferase, aspartate aminotransferase, γ-glutamyltransferase, and serum uric acid in lean NAFLD groupwere all significantly higher than those in lean non-NAFLD group (all P<0.01), and the level of high density lipoprotein was significantly lower than that of lean non-NAFLD group ( t=23.755, P<0.001). The logistic analysis showed that systolic blood pressure ( OR=1.258, 95% CI: 1.081-1.465), diastolic blood pressure ( OR=1.282, 95% CI: 1.056-1.557), total cholesterol ( OR=1.712, 95% CI: 1.525-1.923), triglyceride ( OR=4.115, 95% CI: 3.621-4.676), alanine aminotransferase ( OR=1.467, 95% CI: 1.104-1.950), γ-glutamyltransferase ( OR=1.482, 95% CI: 1.242-1.769), fasting blood glucose ( OR=2.479, 95% CI: 2.092-2.939) and serum uric acid ( OR=1.390, 95% CI: 1.236-1.563) were independent metabolic risk factors for lean NAFLD (all P<0.05). Conclusions:The levels of various metabolic markers in young and middle-aged patients with lean NAFLD increase, and the risk of lean NAFLD increases. Metabolic markers are helpful to screen people at risk of lean NAFLD.

This study was aimed to analyze the treatment of pediatric cough disease by Professor Ni Zhuying and to provide clinical guidance for the treatment of pediatric cough disease.A total of 1640 cases of pediatric cough disease treated by Professor Ni Zhuying were selected.All cases were recorded into the structured clinical case acquisition system.Data mining platform was used in the data analysis.And the frequency statistics were used.Complex network analysis system was used to study the core prescription and traditional Chinese medicine (TCM) compatibility rules.The comparison of efficiency and the chi-squared test were used to analyze the core drug and the common compatibility.The results showed that when Professor Ni treated pediatric cough disease,the top 12 drugs used herbs were tangerine peel,fried bitter almonds,honey ephedra,fructus trichosanthis peel,radix peucedani,bran fried fructus aurantii,prepared rhizoma pinclliae,radix angelicae dahuricae,scutellaria,houttuynia,ramulus uncariae cum uncis,bran fried bombyx batryticatus.The core prescription results from the complex network system analysis was honey ephedra,fried bitter almonds,bran fried fructus aurantii,radix peucedani,fructus trichosanthis peel,dried tangerine peel,prepared rhizoma pinelliae,radix angelicae dahuricae.The commonly used drugs for compatibility were semen lepidii,rhizoma chuanxiong,berba asari;turmeric,raw rhubarb,periostracum cicadae,cortex lycii,vinegar prepared pericarpium citri reticulatae viride,cortex mori;radix astragali,bran fried rhizoma atractylodis macrocephalae,poria;bran fried medicated leaven,fried hawthorn;bulbusfritillariae thunbergii,radix scrophulariae;earthworm,ramulus euonymi,and etc.The drug efficacy and chi-squared test results showed that the main compatibility of drugs had more effect on the trend of efficacy.It was concluded that professor Ni's treatment of pediatric cough disease was mainly from the sputum,heat,and qi.Attention was paid to individual differences of children with syndrome differentiation.It can provide more reference to the treatment of clinical pediatric cough disease.

Objective: To analyze the school adaptation and behavioral performance of the first batch of students who return to school during the COVID-19 epidemic, and to provide a theoretical basis for further development of corresponding intervention measures. Methods: The method of cluster sampling was adopted to conduct anonymous questionnaire survey on the first batch of college students who have returned to a certain university. The survey contents included the basic information of the students, the adaptability of the school after returning to school and the corresponding behavior performance. Results: Male students reported high lever of satisfaction than female students on the dormitory environment health (t=10.28, P<0.01), but low satisfaction on school security and logistical support (t=2.26, P=0.02), rural students marked higher score than urban students for the school closed management system (t=2.82, P=0.01), in terns of school security, Logistics, the degree of school s attention to the epidemic prevention and epidemic prevention, non only-child gave high score than the only children; In terms of their own behavior, the rate of seek medical treatment immediately when they develop COVID-19 related symptoms (68.1%) was lower than that of others (81.3%)(χ 2=223.88，P<0.01)；In addition, the percentage of respondents who chose to report COVID-19 related symptoms (79.5%) was lower than that of others (88.7%)(χ 2=97.49，P<0.01). A total of 2 671 college students (98.9%) were able to wear masks every day and 2 457 (90.9%) chose to improve their diet to improve their immunity. Conclusion The first batch of college students who return to school have a high level of satisfaction on school management, and can take active measures to adapt to the life back to school and commit self-protection, however targeted measures to are still needed further strengthen students health education.

Objective: To understand the current situation and influencing factors of Internet addiction among college students after returning to school during the COVID-19 epidemic, and to provide scientific basis for timely intervention measures to adjust the risk factors of Internet addiction. Methods: A cluster sampling method was adopted to conduct a questionnaire survey among 2 700 college students who firstly returned to college using general condition questionnaire and Internet Addiction scale. Results: The detection rate of Internet addiction disorder was 32.4% among returning college students, moreover, the detection rate of Internet addiction in male students(36.0%) was higher than that in female students (31.2%) (χ 2=5.42,P<0.05). The degree of Internet addiction was negatively correlated with the physical health score (r-s=-0.20) and mental health score (r-s=-0.24) of college students (P<0.01). Multivariate Logistic regression analysis showed that compared with introversion, neutral (OR=0.67, 95%CI=0.55-0.82) and extroverted college students (OR=0.59, 95%CI=0.48-0.74) were protective factors for Internet addiction; compared with no exercise, physical exercise ≥3 times or more per week (exercise 3-4 times：OR=0.67, 95%CI=0.51-0.87; ≥5 times：OR=0.67, 95%CI=0.50-0.90) were the protective factors for Internet addiction among college students; family loss during the epidemic was a risk factor for Internet addiction among college students (OR=1.34, 95%CI=1.12-1.60); the risk of Internet addiction was 2.13 times higher for college students who actively sought psychological help than for those who did not seek psychological help (95%CI=1.14-3.96); college students who did not want to go back to school had 1.50 times the risk of Internet addiction as those who did (95%CI=1.26-1.77). Conclusion The current situation of college students online behaviors during COVID-19 is not optimistic, and should arouse sufficient attention from society and universities. In addition, college students returning to school should take more physical exercises and psychological counseling to detect and intervene in psychological problems in time, reduce their psychological burden, and enhance their psychological quality.