BACKGROUND:Exosomes,as a type of extracellular vesicle,have become a key medium for cell-to-cell communication due to their nanoscale size and enrichment of various bioactive substances.The study of exosome secretion regulation not only has important scientific value,but also has broad application prospects in clinical practice,and is of great significance for promoting medical progress and improving human health.OBJECTIVE:To review the biological characteristics,biological functions,biogenesis process and biochemical regulation mechanism of exosomes,and to explore the application prospects of exosomes in disease diagnosis,treatment and vaccine development,so as to provide theoretical basis and reference for basic research and clinical transformation of exosomes.METHODS:The first author searched PubMed and CNKI databases in October 2024 for relevant literature published from January 2010 to October 2024.Key words were"exosomes,biological functions,biogenesis,secretion or release,regulatory mechanisms,application prospects"in Chinese and English.Finally,92 articles were included for analysis.RESULTS AND CONCLUSION:The secretion level of exosomes can be regulated through physical or biochemical means.Exosomes show broad application prospects in the fields of disease diagnosis,treatment,and vaccine development,and may play a key role in the treatment of cardiovascular and cerebrovascular diseases as well as cancer.This review provides valuable information for the clinical translation and application research of exosomes,helping to promote future progress in exosome research and application.

BACKGROUND:Exosomes,as a type of extracellular vesicle,have become a key medium for cell-to-cell communication due to their nanoscale size and enrichment of various bioactive substances.The study of exosome secretion regulation not only has important scientific value,but also has broad application prospects in clinical practice,and is of great significance for promoting medical progress and improving human health.OBJECTIVE:To review the biological characteristics,biological functions,biogenesis process and biochemical regulation mechanism of exosomes,and to explore the application prospects of exosomes in disease diagnosis,treatment and vaccine development,so as to provide theoretical basis and reference for basic research and clinical transformation of exosomes.METHODS:The first author searched PubMed and CNKI databases in October 2024 for relevant literature published from January 2010 to October 2024.Key words were"exosomes,biological functions,biogenesis,secretion or release,regulatory mechanisms,application prospects"in Chinese and English.Finally,92 articles were included for analysis.RESULTS AND CONCLUSION:The secretion level of exosomes can be regulated through physical or biochemical means.Exosomes show broad application prospects in the fields of disease diagnosis,treatment,and vaccine development,and may play a key role in the treatment of cardiovascular and cerebrovascular diseases as well as cancer.This review provides valuable information for the clinical translation and application research of exosomes,helping to promote future progress in exosome research and application.

Objective To explore the effectiveness of risk assessment in the prevention and control of central line associated-bloodstream infection(CLABSI),identify high-risk departments and processes,and develop targeted measures to reduce the risk.Methods Healthcare-associated infection control risk assessment form designed by American Association for Professionals in Infection Control and Epidemiology(APIC)was applied to assess the risk factors for CLABSI in 13 intensive care units(ICUs)in a hospital.Each risk indicator was identified,analyzed,and evaluated from three dimensions:the likelihood of risk occurrence,severity of consequences,and integrity of the current management system.Results The risk assessment results found that the general ICU and respiratory ICU had extremely high risk,cardiac surgery ICU and organ transplant ICU had high risk.Through one-year continuous intervention,the incidence of CLABSI decreased significantly,the awareness rate of CLABSI prevention and control measures and the implementation rate of partial measures increased significantly(all P＜0.05).Conclusion The application of risk assessment can screen high-risk departments,focus efforts on the intervention,and enhance the effectiveness of CLABSI risk prevention and control.

OBJECTIVE To explore the effect of failure mode and effect analysis(FMEA)on management of hospi-tal-associated infections(HAIs)in hemodialysis center.METHODS In Nov.2023,the risk priority number(RPN)integrated with action priority(AP)was adopted to identify,analyze and evaluate the risk factors in man-agement of HAIs in hemodialysis center of Tongji Hospital Affiliated to Tongji Medical College,Huazhong Uni-versity of Science and Technology by FMEA method.The high risk points that needed to be taken interventions were screened out,and the targeted measures were formulated to control the risks.At the end of the intervention period,a second round of risk assessment was carried out for improvement status of the high-risk points in Nov.2024,and the effect on the management of HAIs was evaluated.RESULTS The risk assessment was carried out for 48 risk points covering eight aspects,including organizational structure,self-inspection and supervision,staff management,environmental layout,cleaning and disinfection,surveillance,operation procedures and i-tem management.There were 9 risk points with the RPN values greater than 125,3 of which were with the AP value of"H".There were 8 risk points with the RPN value less than 125 and 6 risk points with the AP value drop-ping down to L after the targeted intervention measures were taken,indicating that the risk management has a-chieved favorable effect.CONCLUSIONS The RPN and AP integrated with FMEA can accurately identify the high-risk points in the quality management of the hemodialysis center.It is necessary to take targeted interven-tion measures so as to boost the effect on prevention and control of HAIs in the hemodialysis center and reduce the risk of HAIs in the hemodialysis patients.

Objective:To examine the information processing patterns of college students with high and low procrastination in intertemporal decision-making.Methods:A total of 29 high procrastination college students[Irra-tional Procrastination Scale(IPS)score＞27]and 29 low procrastination college students(IPS score≤27)were recruitted.A 2(group:high/low procrastination)×2(amount:￥100,￥1 000)×5(delay:10/30/90/180/360 days)mixed experimental design was employed.Behavioral measures(delay discounting rates,Payne index)and eye-tracking measures(option/dimension fixation time ratios)were collected.Results:The delay discounting rate had the main effects of group,amount and delay(F=6.62,25.38,121.31,Ps＜0.05).The delay discounting rates were higher in the high procrastination group than in the low procrastination group.The delay discounting rates were higher for a amount of 1 000 yuan than 100 yuan.The delay discounting rate was the highest when the delay was 10 days.The option fixation time ratios were higher in the high procrastination group than in the low procrastination group(P＜0.01),and there were interaction effects between group and amount and between group and delay(F=5.67,2.52,Ps＜0.05).The dimension fixation time ratios were lower for a amount of 1 000 yuan than 100 yuan(P＜0.01).Conclusion:College students with high procrastination exhibit a higher delay discounting rate and stronger attentional bias toward immediate options during intertemporal decision-making.However,both groups pri-oritized the monetary dimension in their information processing strategies.

Objective:To evaluate the impact of Diagnosis-Intervention Packet(DIP)payment reform on medical service costs and efficiency for inpatients in public hospitals,and to compare differences between surgical and medical groups.Methods:A quasi-experimental design was employed,using 605 636 discharged patients from a tertiary hospital in Hebei Province between January 2020 and March 2025 as the sample.The difference-in-differences(DID)model was used to analyze the changes in key indicators between the DIP settlement group(intervention group)and the non-DIP settlement group(control group).Results:Total hospitalization costs,out-of-pocket expenses,and medication costs were significantly reduced in the DIP settlement group(P<0.05),while costs for examinations,nursing,laboratory tests,and treatments increased significantly(P<0.05).Material costs increased by 30.7%in the surgical group(P<0.1)and decreased by 19.8%in the medical group(P<0.01).In terms of efficiency,the average length of stay,time,and cost consumption index all decreased(P<0.01),while the proportion of medical services increased(P<0.01).The case mix index(CMI)showed no significant changes.Conclusion:The DIP reform effectively controlled costs and improved efficiency,but it also resulted in cost shifting and departmental disparities.Therefore,it is necessary to optimize cost control and departmental management policies.

Objective:To examine the information processing patterns of college students with high and low procrastination in intertemporal decision-making.Methods:A total of 29 high procrastination college students[Irra-tional Procrastination Scale(IPS)score＞27]and 29 low procrastination college students(IPS score≤27)were recruitted.A 2(group:high/low procrastination)×2(amount:￥100,￥1 000)×5(delay:10/30/90/180/360 days)mixed experimental design was employed.Behavioral measures(delay discounting rates,Payne index)and eye-tracking measures(option/dimension fixation time ratios)were collected.Results:The delay discounting rate had the main effects of group,amount and delay(F=6.62,25.38,121.31,Ps＜0.05).The delay discounting rates were higher in the high procrastination group than in the low procrastination group.The delay discounting rates were higher for a amount of 1 000 yuan than 100 yuan.The delay discounting rate was the highest when the delay was 10 days.The option fixation time ratios were higher in the high procrastination group than in the low procrastination group(P＜0.01),and there were interaction effects between group and amount and between group and delay(F=5.67,2.52,Ps＜0.05).The dimension fixation time ratios were lower for a amount of 1 000 yuan than 100 yuan(P＜0.01).Conclusion:College students with high procrastination exhibit a higher delay discounting rate and stronger attentional bias toward immediate options during intertemporal decision-making.However,both groups pri-oritized the monetary dimension in their information processing strategies.

Objective:To evaluate the impact of Diagnosis-Intervention Packet(DIP)payment reform on medical service costs and efficiency for inpatients in public hospitals,and to compare differences between surgical and medical groups.Methods:A quasi-experimental design was employed,using 605 636 discharged patients from a tertiary hospital in Hebei Province between January 2020 and March 2025 as the sample.The difference-in-differences(DID)model was used to analyze the changes in key indicators between the DIP settlement group(intervention group)and the non-DIP settlement group(control group).Results:Total hospitalization costs,out-of-pocket expenses,and medication costs were significantly reduced in the DIP settlement group(P<0.05),while costs for examinations,nursing,laboratory tests,and treatments increased significantly(P<0.05).Material costs increased by 30.7%in the surgical group(P<0.1)and decreased by 19.8%in the medical group(P<0.01).In terms of efficiency,the average length of stay,time,and cost consumption index all decreased(P<0.01),while the proportion of medical services increased(P<0.01).The case mix index(CMI)showed no significant changes.Conclusion:The DIP reform effectively controlled costs and improved efficiency,but it also resulted in cost shifting and departmental disparities.Therefore,it is necessary to optimize cost control and departmental management policies.

Objective To explore the effectiveness of risk assessment in the prevention and control of central line associated-bloodstream infection(CLABSI),identify high-risk departments and processes,and develop targeted measures to reduce the risk.Methods Healthcare-associated infection control risk assessment form designed by American Association for Professionals in Infection Control and Epidemiology(APIC)was applied to assess the risk factors for CLABSI in 13 intensive care units(ICUs)in a hospital.Each risk indicator was identified,analyzed,and evaluated from three dimensions:the likelihood of risk occurrence,severity of consequences,and integrity of the current management system.Results The risk assessment results found that the general ICU and respiratory ICU had extremely high risk,cardiac surgery ICU and organ transplant ICU had high risk.Through one-year continuous intervention,the incidence of CLABSI decreased significantly,the awareness rate of CLABSI prevention and control measures and the implementation rate of partial measures increased significantly(all P＜0.05).Conclusion The application of risk assessment can screen high-risk departments,focus efforts on the intervention,and enhance the effectiveness of CLABSI risk prevention and control.

OBJECTIVE To explore the effect of failure mode and effect analysis(FMEA)on management of hospi-tal-associated infections(HAIs)in hemodialysis center.METHODS In Nov.2023,the risk priority number(RPN)integrated with action priority(AP)was adopted to identify,analyze and evaluate the risk factors in man-agement of HAIs in hemodialysis center of Tongji Hospital Affiliated to Tongji Medical College,Huazhong Uni-versity of Science and Technology by FMEA method.The high risk points that needed to be taken interventions were screened out,and the targeted measures were formulated to control the risks.At the end of the intervention period,a second round of risk assessment was carried out for improvement status of the high-risk points in Nov.2024,and the effect on the management of HAIs was evaluated.RESULTS The risk assessment was carried out for 48 risk points covering eight aspects,including organizational structure,self-inspection and supervision,staff management,environmental layout,cleaning and disinfection,surveillance,operation procedures and i-tem management.There were 9 risk points with the RPN values greater than 125,3 of which were with the AP value of"H".There were 8 risk points with the RPN value less than 125 and 6 risk points with the AP value drop-ping down to L after the targeted intervention measures were taken,indicating that the risk management has a-chieved favorable effect.CONCLUSIONS The RPN and AP integrated with FMEA can accurately identify the high-risk points in the quality management of the hemodialysis center.It is necessary to take targeted interven-tion measures so as to boost the effect on prevention and control of HAIs in the hemodialysis center and reduce the risk of HAIs in the hemodialysis patients.