OBJECTIVE To explore the optimal preprocessing protocols for colonoscopes based on the orthogonal experimental design combined with cost analysis.METHODS An orthogonal design experiment was conducted in Nanjing Drum Tower Hospital,The Affiliated Hospital of Nanjing University Medical Hospital.Totally 4 influen-cing factors for preprocessing and 3 corresponding levels were formed to 9 types of preprocessing protocols on the bases of orthogonal design.The colonoscopes that were used for diagnosis and treatment of 180 patients were ran-domly divided into 9 groups,each group was treated with one preprocessing protocol.The adenosine triphos-phatase(ATP)test and microbial culture were carried out after the preprocessing,cleaning and disinfection.The costs of the 9 preprocessing protocols were analyzed.RESULTS There were significant differences in the ATP val-ue and bacterial colony counts between the factor A(the type of preprocessing solution)and the factor C(prepro-cessing suction time)after the preprocessing(all P＜0.05);A3 and C2 were the optimal levels.There were no significant differences in the ATP value and bacterial colony counts among the factor A(the type of preprocessing solution),the factor B(the change frequency of preprocessing solution),the factor C(the preprocessing suction time)and the factor D(the interval between preprocessing and the cleaning).The qualified rates of cleaning of all the 9 groups reached up to 100.00％,and the qualified rates of disinfection were no less than 90.00％.The result of rank sum test showed that there were no significant differences in the ATP value(H=5.449,P=0.709)and the bacterial colony counts(H=1.770,P=0.987)among the 9 groups after the disinfection.The cost analysis showed that the cost was lowest when water was used as the preprocessing solution.CONCLUSION The optimal protocol for preprocessing of colonoscopes is that the alkaline solution is used as the preprocessing solution,with the change frequency changing every 4 hours,the suction time 20 seconds;the delay time should be determined based on the specific clinical condition,and the colonoscopes should be cleaned as early as possible.

Objective To understand the respiratory pathogen infection of acute fever and respiratory symptoms in a hospital in Jinan City,explore its epidemiological characteristics,and provide reference for the scientific diagnosis and treatment of acute respiratory infection in this region.Methods Patients who underwent respiratory pathogen IgM antibody detection at Shandong Provincial Hospital Affiliated to Shandong First Medical University from Janu-ary 2018 to June 2024 were selected as the research subjects.IgM antibody detection was performed on 9 common respiratory pathogens by magnetic particle chemiluminescence method.Pathogen detection of patients stratified by genders,age,season,and years was analyzed.Results A total of 19 463 patients were included in the analysis,out of which 6 933 patients were detected with at least one kind of pathogen,accounting for 35.62％.The top three pathogens with high detection rates were Mycoplasma pneumoniae(MP),influenza B virus(FluB),and influenza A virus(FluA),with detection rates of 17.14％,13.62％,and 4.58％,respectively.The detection rates of single and multiple pathogens were 28.57％and 7.05％,respectively.The detection rate of females was higher than that of males(38.02％ vs 33.78％),with statistically significant difference(P＜0.001).With the increase of age,the total detection of respiratory pathogens first decreased,then increased.Detection rate of respiratory pathogens was highest in winter(41.59％)and lowest in autumn(31.23％).The total detection rate decreased year by year.Conclusion Respiratory pathogen infection in this region is mainly caused by MP and FluB,with minors being the high-risk population and winter being the peak season.In recent years,the detection rate has been decreasing year by year.Effort should be made to strengthen the prevention and treatment of high-risk populations during the peak season,so as to avoid large-scale regional epidemics.

OBJECTIVE To investigate the current status and existing problems in pretreatment of digestive endo-scopes in medical institutions of Jiangsu Province so as to optimize the pretreatment procedures.METHODS From Nov.7,2024 to Nov.17 2024,a questionnaire was preliminarily designed based on the current endoscope-related guidelines and standards by the infection control team of digestive endoscopy center of The Affiliated Drum Tower Hospital of Nanjing University Medical School.A cross-sectional survey was conducted for various levels of medi-cal institutions of Jiangsu Province by Wenjuanxing platform.The content of the survey covered basic information of the digestive endoscopy center,implementation status of pretreatment,operation status of pretreatment,quali-ty monitoring and management.RESULTS A total of 122 medical institutions were finally included in the survey,61 of which were tertiary hospitals,35 were secondary hospitals,and 26 were primary hospitals.97.54％of the medical institutions could implement the pretreatment procedures after every endoscopes use,while there was significant difference in the concrete details of pretreatment among the various grades of hospitals.64.75％of the medical institutions used dedicated buttons for pretreatment,however,there was significant difference in the cause for failed change of dedicated buttons among the various grades of medical institutions(x2=14.657,P＜0.001).76.23％of the medical institutions carried out the pretreatment for special sites of the endoscopes(pli-ers' pipelines,auxiliary water rinsing pipelines).Gas and water insufflation were maintained for over 10 seconds(77.87％).The suction duration was judged mainly based on subjective knowledge.The enzyme solution was the major pretreatment solution(94.26％).The changing frequency was dominated by'one use per change'(45.08％).There was significant difference in the time interval between pretreatment and cleaning among the va-rious grades of medical institutions(x2=10.032,P=0.012).57.38％of the medical institutions evaluated the quality of the pretreatment,and visual observation was the major method for quality assessment(53.28％).There was significant difference in the establishment of pretreatment system among the various grades of medical institu-tions(x2=7.033.P=0.030).CONCLUSIONS The pretreatment of the endoscopes is overall performed well in the 122 medical institutions of Jiangsu Province;however,the details of pretreatment procedure,quality monito-ring and management need to be improved.It is suggested that the related departments should accelerate the revi-sion of endoscope pretreatment-related standards so as to standardize professional behavior.

Objective To explore the influence of hsa_circ_0004535 on type 2 diabetes(T2DM)combined with metabolic-associated fatty liver disease(MAFLD)model mice.Methods Forty-eight healthy SPF grade Balb/c mice were selected for modeling and divided into the following groups(n=6 per group):Control group:normal feed;T2DM group:diabetes model induced by high-glucose and high-fat diet;T2DM combined MAFLD group:non-alcoholic fatty liver high-glucose and high-fat diet-induced diabetes combined with fatty liver model;T2DM combined MAFLD+hsa_circ_NC group:after 4 weeks of modeling,10 nmol hsa_circ_NC injected into the tail vein;T2DM combined MAFLD+hsa_circ_0004535 group:after 4 weeks of modeling,10 nmol circ_0004535 injected into the tail vein;T2DM combined MAFLD+miRNA_NC group:after 4 weeks of modeling,10 nmol miRNA blank control injected into the tail vein;T2DM combined MAFLD+miR-1827 agomir group:after 4 weeks of modeling,10 nmol miR-1827 agomir injected into the tail vein;and T2DM combined MAFLD+miR-1827 antagomir group:after 4 weeks of modeling,10 nmol miR-1827 antagomir injected into the tail vein.Mouse body weight was measured after the interventions and recorded weekly.Glucose and insulin tolerance tests were performed,blood lipids and liver function were measured,the liver and insulin resistance indexes were calculated,and pathological tests(hematoxylin/eosin(HE),oil red O,and Masson staining,immunohistochemistry,terminal deoxynucleotidyl transferase dUTP nick end labeling(TUNEL))were performed to measure the degree of hepatic inflammation,fat deposition,and fibrosis.Results(1)Body weight,liver weight,liver index,insulin resistance index,and biochemical indexes were all significantly lower in the hsa_circ_0004535 injection group compared with the hsa_circ_NC injection group and the T2DM combined MAFLD group(both P＜0.05).(2)Steatosis vacuoles were reduced and smaller and inflammatory cell infiltration was reduced in the T2DM combined MAFLD+circ_0004535 group,as shown by HE and oil red staining.(3)TUNEL-positive cells were significantly reduced in the T2DM combined MAFLD+hsa_circ_0004535 group(P＜0.05).(4)Collagen fiber deposition was significantly reduced in the T2DM combined MAFLD+hsa_circ_0004535 group,as shown by Masson staining(P＜0.05).Conclusions The expression of hsa_circ_0004535 and miRNA-1827 play important roles in regulating lipid metabolism,insulin sensitivity,inflammatory pathways,hepatocyte apoptosis,and hepatic fibrosis-related pathways in an animal model of T2DM combined with MAFLD.

Objective To understand the respiratory pathogen infection of acute fever and respiratory symptoms in a hospital in Jinan City,explore its epidemiological characteristics,and provide reference for the scientific diagnosis and treatment of acute respiratory infection in this region.Methods Patients who underwent respiratory pathogen IgM antibody detection at Shandong Provincial Hospital Affiliated to Shandong First Medical University from Janu-ary 2018 to June 2024 were selected as the research subjects.IgM antibody detection was performed on 9 common respiratory pathogens by magnetic particle chemiluminescence method.Pathogen detection of patients stratified by genders,age,season,and years was analyzed.Results A total of 19 463 patients were included in the analysis,out of which 6 933 patients were detected with at least one kind of pathogen,accounting for 35.62％.The top three pathogens with high detection rates were Mycoplasma pneumoniae(MP),influenza B virus(FluB),and influenza A virus(FluA),with detection rates of 17.14％,13.62％,and 4.58％,respectively.The detection rates of single and multiple pathogens were 28.57％and 7.05％,respectively.The detection rate of females was higher than that of males(38.02％ vs 33.78％),with statistically significant difference(P＜0.001).With the increase of age,the total detection of respiratory pathogens first decreased,then increased.Detection rate of respiratory pathogens was highest in winter(41.59％)and lowest in autumn(31.23％).The total detection rate decreased year by year.Conclusion Respiratory pathogen infection in this region is mainly caused by MP and FluB,with minors being the high-risk population and winter being the peak season.In recent years,the detection rate has been decreasing year by year.Effort should be made to strengthen the prevention and treatment of high-risk populations during the peak season,so as to avoid large-scale regional epidemics.

OBJECTIVE To investigate the current status and existing problems in pretreatment of digestive endo-scopes in medical institutions of Jiangsu Province so as to optimize the pretreatment procedures.METHODS From Nov.7,2024 to Nov.17 2024,a questionnaire was preliminarily designed based on the current endoscope-related guidelines and standards by the infection control team of digestive endoscopy center of The Affiliated Drum Tower Hospital of Nanjing University Medical School.A cross-sectional survey was conducted for various levels of medi-cal institutions of Jiangsu Province by Wenjuanxing platform.The content of the survey covered basic information of the digestive endoscopy center,implementation status of pretreatment,operation status of pretreatment,quali-ty monitoring and management.RESULTS A total of 122 medical institutions were finally included in the survey,61 of which were tertiary hospitals,35 were secondary hospitals,and 26 were primary hospitals.97.54％of the medical institutions could implement the pretreatment procedures after every endoscopes use,while there was significant difference in the concrete details of pretreatment among the various grades of hospitals.64.75％of the medical institutions used dedicated buttons for pretreatment,however,there was significant difference in the cause for failed change of dedicated buttons among the various grades of medical institutions(x2=14.657,P＜0.001).76.23％of the medical institutions carried out the pretreatment for special sites of the endoscopes(pli-ers' pipelines,auxiliary water rinsing pipelines).Gas and water insufflation were maintained for over 10 seconds(77.87％).The suction duration was judged mainly based on subjective knowledge.The enzyme solution was the major pretreatment solution(94.26％).The changing frequency was dominated by'one use per change'(45.08％).There was significant difference in the time interval between pretreatment and cleaning among the va-rious grades of medical institutions(x2=10.032,P=0.012).57.38％of the medical institutions evaluated the quality of the pretreatment,and visual observation was the major method for quality assessment(53.28％).There was significant difference in the establishment of pretreatment system among the various grades of medical institu-tions(x2=7.033.P=0.030).CONCLUSIONS The pretreatment of the endoscopes is overall performed well in the 122 medical institutions of Jiangsu Province;however,the details of pretreatment procedure,quality monito-ring and management need to be improved.It is suggested that the related departments should accelerate the revi-sion of endoscope pretreatment-related standards so as to standardize professional behavior.

Objective To explore the influence of hsa_circ_0004535 on type 2 diabetes(T2DM)combined with metabolic-associated fatty liver disease(MAFLD)model mice.Methods Forty-eight healthy SPF grade Balb/c mice were selected for modeling and divided into the following groups(n=6 per group):Control group:normal feed;T2DM group:diabetes model induced by high-glucose and high-fat diet;T2DM combined MAFLD group:non-alcoholic fatty liver high-glucose and high-fat diet-induced diabetes combined with fatty liver model;T2DM combined MAFLD+hsa_circ_NC group:after 4 weeks of modeling,10 nmol hsa_circ_NC injected into the tail vein;T2DM combined MAFLD+hsa_circ_0004535 group:after 4 weeks of modeling,10 nmol circ_0004535 injected into the tail vein;T2DM combined MAFLD+miRNA_NC group:after 4 weeks of modeling,10 nmol miRNA blank control injected into the tail vein;T2DM combined MAFLD+miR-1827 agomir group:after 4 weeks of modeling,10 nmol miR-1827 agomir injected into the tail vein;and T2DM combined MAFLD+miR-1827 antagomir group:after 4 weeks of modeling,10 nmol miR-1827 antagomir injected into the tail vein.Mouse body weight was measured after the interventions and recorded weekly.Glucose and insulin tolerance tests were performed,blood lipids and liver function were measured,the liver and insulin resistance indexes were calculated,and pathological tests(hematoxylin/eosin(HE),oil red O,and Masson staining,immunohistochemistry,terminal deoxynucleotidyl transferase dUTP nick end labeling(TUNEL))were performed to measure the degree of hepatic inflammation,fat deposition,and fibrosis.Results(1)Body weight,liver weight,liver index,insulin resistance index,and biochemical indexes were all significantly lower in the hsa_circ_0004535 injection group compared with the hsa_circ_NC injection group and the T2DM combined MAFLD group(both P＜0.05).(2)Steatosis vacuoles were reduced and smaller and inflammatory cell infiltration was reduced in the T2DM combined MAFLD+circ_0004535 group,as shown by HE and oil red staining.(3)TUNEL-positive cells were significantly reduced in the T2DM combined MAFLD+hsa_circ_0004535 group(P＜0.05).(4)Collagen fiber deposition was significantly reduced in the T2DM combined MAFLD+hsa_circ_0004535 group,as shown by Masson staining(P＜0.05).Conclusions The expression of hsa_circ_0004535 and miRNA-1827 play important roles in regulating lipid metabolism,insulin sensitivity,inflammatory pathways,hepatocyte apoptosis,and hepatic fibrosis-related pathways in an animal model of T2DM combined with MAFLD.

OBJECTIVE To explore the optimal preprocessing protocols for colonoscopes based on the orthogonal experimental design combined with cost analysis.METHODS An orthogonal design experiment was conducted in Nanjing Drum Tower Hospital,The Affiliated Hospital of Nanjing University Medical Hospital.Totally 4 influen-cing factors for preprocessing and 3 corresponding levels were formed to 9 types of preprocessing protocols on the bases of orthogonal design.The colonoscopes that were used for diagnosis and treatment of 180 patients were ran-domly divided into 9 groups,each group was treated with one preprocessing protocol.The adenosine triphos-phatase(ATP)test and microbial culture were carried out after the preprocessing,cleaning and disinfection.The costs of the 9 preprocessing protocols were analyzed.RESULTS There were significant differences in the ATP val-ue and bacterial colony counts between the factor A(the type of preprocessing solution)and the factor C(prepro-cessing suction time)after the preprocessing(all P＜0.05);A3 and C2 were the optimal levels.There were no significant differences in the ATP value and bacterial colony counts among the factor A(the type of preprocessing solution),the factor B(the change frequency of preprocessing solution),the factor C(the preprocessing suction time)and the factor D(the interval between preprocessing and the cleaning).The qualified rates of cleaning of all the 9 groups reached up to 100.00％,and the qualified rates of disinfection were no less than 90.00％.The result of rank sum test showed that there were no significant differences in the ATP value(H=5.449,P=0.709)and the bacterial colony counts(H=1.770,P=0.987)among the 9 groups after the disinfection.The cost analysis showed that the cost was lowest when water was used as the preprocessing solution.CONCLUSION The optimal protocol for preprocessing of colonoscopes is that the alkaline solution is used as the preprocessing solution,with the change frequency changing every 4 hours,the suction time 20 seconds;the delay time should be determined based on the specific clinical condition,and the colonoscopes should be cleaned as early as possible.

OBJECTIVE To assess the efficacy and safety of different treatment modalities for moderate to severe Henoch- Schönlein purpura nephritis （HSPN）. METHODS Literature searches were conducted in the CNKI， VIP， Wanfang Data， SinoMed， PubMed， OVID， Web of Science， Embase， and the Cochrane Library to collect randomized controlled trials （RCTs） and cohort studies on the treatment of moderate to severe HSPN with 12 intervention measures： monotherapy with glucocorticoid （GC）， as well as cyclophosphamide， mycophenolate mofetil （MMF）， Tripterygium wilfordii multiglucoside （TWM）， leflunomide， mizoribine， tacrolimus， cyclosporin A， hemoperfusion， tonsillectomy combined with GC， and double filtration plasmapheresis （DFPP） combined with GC and cyclophosphamide or mycophenolate mofetil. The search period was from the inception of the databases to March 2024. After literature screening， data extraction， and quality assessment， a network meta- analysis was performed using Stata 16.0 software. RESULTS A total of 28 articles were included， with 14 RCTs and 14 cohort studies， involving 1 746 patients. The network meta-analysis results showed the combination of tacrolimus and GC had the highest probability of being the best in overall remission rate， followed by the combination of TWM and GC， and DFPP combined with GC and MMF. The combination of leflunomide and GC had the highest probability of being the best in complete remission rate， followed by the combination of mizoribine and GC， and DFPP combined with GC and cyclophosphamide. The combination of mizoribine and GC had the highest probability of being the best in terms of reducing 24-hour urinary protein quantification， followed by DFPP combined with GC and MMF， and the combination of leflunomide and GC. Moreover， the combination of tacrolimus and GC had the highest probability of being the best in safety， followed by the combination of cyclosporin A and GC， and the combination of leflunomide and GC. CONCLUSIONS Compared to other treatment methods， the combination therapy of tacrolimus and GC shows better efficacy and safety in the treatment of moderate to severe HSPN.

Objective To analyze the pathological features of Liver in chronic asymptomatic carrier (AsC) and to diagnose and treat AsC correctly.Methods 115 patients with AsC were examined with serological markers of B-hepatitis,liver function serum,HBV-DNA level,liver biopsy and immunohistochemistry.Results Of 115 patients with AsC,there were 8.7% patients with invisibly pathological lesions of hepatic tissue (G_0S_0),29.6% patients with chronic hepatitis,1.7% patients with cirrhosis.Through immunohistochemistry HBsAg and HBcAg test,there were 66.96% patients with HBsAg(+) and HBcAg(+),33.04% patients with single HBsAg(+).Conclusions Liver biopsy and immunohistochemistry can help to correct diagnose.It has important directional significance to treat AsC and establish treatment project of AsC.