Objective To discuss the application of the"rotating guidewire and correcting the filter recovery hook direction technique"("rotation-correction loop technique"for short),a technique invented by the authors in clinical practice,in the retrieval of complex inferior vena cava filter(IVCF),and to discuss its technical skills and advantages.Methods The clinical data of 417 patients carrying an IVCF,who were admitted to the Department of Vascular Surgery of Second Hospital of Shanxi Medical University of China to retrieve IVCF between January 2022 and December 2022,were retrospectively analyzed.Taking the time spent on the retrieval of IVCF and the intraoperative radiation dose as the evaluation indicators,the advantages and disadvantages of the standard filter retrieval technique,the"rotation-correction loop technique"and the other loop-assisted techniques were compared.Results Both the intraoperative radiation dose and the time spent on the retrieval of IVCF using"rotation-correction loop technique"were remarkably lower than those of other loop-assisted techniques(P＜0.000 1).Conclusion For the retrieval of complex IVCF,especially for the IVCF which is heavily tilted and/or its recovered hook is attached to the vascular wall,the use of"rotation-correction loop technique"can shorten the time spent on the the retrieval of IVCF and reduce the intraoperative radiation dose.This technique carries high safety and practicability,the device is simple and it can be manipulated by single physician,which is conducive to clinical application and promotion.(J Intervent Radiol,2024,33:289-294)

Objective:To prevent the possible effects of population aging and find out countermeasures to ensure the sustainable development of basic medical insurance fund balances.Methods:Using system dynamics,by coupling the three subsystems of basic medical insurance fund income,basic medical insurance fund expenditure,and population size,a causal relationship diagram and stock flow diagram are drawn to construct a system dynamics model,and Vensim Software is used for simulation.Results:Under the predicted natural conditions,the balance of the basic medical insurance fund will show a trend of first increasing and then decreasing from 2023 to 2030.Adjusting and combining the three variables of retirement strategy,outpatient visits,and participation rate into four solutions,among which simultaneously implementing the prediction plan of delaying retirement,expanding basic medical insurance coverage,and strengthening elderly health management can significantly reduce the decline of the basic medical insurance fund.Conclusion:The aging population will be detrimental to the sustainable development of the surplus of the basic medical insurance fund.Based on this,the following suggestions are proposed:implement appropriate delayed retirement policies to increase the income of the basic medical insurance fund;further expand the coverage of insured individuals to enhance the risk resistance of the basic medical insurance fund;strengthen the health management of the elderly to control the excessively rapid growth of the basic medical insurance fund expenditures.

Background and purpose:BRCA1/2 plays an important role in maintaining the genome stability.Whether BRCA1/2 germline mutation could increase the tumor sensitivity to radiotherapy,thereby inducing secondary primary cancer after radiotherapy is unclear.This study aimed to investigate whether postoperative radiotherapy is a risk factor for the development of second primary cancer in triple-negative breast cancer(TNBC)patients with BRCA1/2 germline mutation.Methods:This research was based on a previously reported retrospective cohort,i.e.,the Fudan University Shanghai Cancer Center TNBC cohort.Between January 1,2007 and December 31,2014,a total of 292 female TNBC patients with BRCA1/2 mutation were enrolled.We performed logistic regression analysis in patients without BRCA1/2 germline mutation(n=261)and BRCA1/2 germline mutation patients(n=31),respectively,to assess the risk factors affecting the incidence of second primary cancer.We then performed interactive analysis on the above two analyses to evaluate the interactive effect between BRCA1/2 germline mutation and postoperative radiotherapy.P<0.05 indicates a statistically significant difference.The research was approved by Fudan University Shanghai Cancer Center TNBC Ethics Committee(050432-4-2108),and each patient provided written informed consent.Results:Logistic regression analysis in patients with BRCA1/2 germline mutations showed that postoperative radiotherapy significantly increased the risk of secondary primary disease compared to non-radiotherapy[odds ratio(OR)=2.475,95%confidence interval(CI):1.933-3.167,P<0.001].In patients without BRCA1/2 germline mutation,the effect of radiotherapy on the incidence of second primary tumor was not significant.There was a significant interaction between BRCA1/2 germline mutation and postoperative radiotherapy for the incidence of secondary primary cancer(OR=9.710,95%CI:0.320-295.250,P=0.193).Conclusion:Although statistical analysis results show that patients with BRCA1/2 germline mutations have an increased risk of developing a second primary tumor after postoperative radiotherapy compared to patients who have not received radiotherapy,there is no significant correlation between BRCA1/2 germline mutations and radiotherapy for the development of a second primary tumor.Therefore,patients with BRCA1/2 germline mutations who receive radiotherapy after surgery may not increase the risk of developing a second primary tumor.

Objective To explore the characteristics of apolipoprotein E(APOE)gene polymorphism in patients with Alzheimer's disease(AD)and mild cognitive impairment(MCI)due to AD,as well as its corre-lation with baseline levels of ketone bodies.Methods A total of 110 AD patients from the outpatient and neu-rology wards of the hospital from January 2020 to October 2023 were selected as the AD group,105 patients(none of whom had used anti dementia drugs)were selected as the MCI group,and 110 healthy elderly exami-nees in the physical examination center were selected as the control group.APOE gene polymorphism,and the levels of serum β-hydroxybutyrate(HB)and urine ketone bodies were measured.The distribution of APOE genotype among the three groups was analyzed,and the differences of the levels of serum HB and urine ketone bodies were compared among those carried APOE ε4 allele and those did not.Results Among the three groups,the statistical significance was found in the differences of APOE genotype and ε2,ε3,ε4 allele(P<0.05).The proportion of APOE ε4 allele carriers in the AD group and the MCI group was higher than that in the control group(P<0.05).The levels of serum βHB in the AD group and the MCI group were lower than that in the control group(P<0.05).The levels of serum βHB in those carried APOE ε4 in the AD group were significantly lower than that in the control individuals(P<0.05).There was no statistically significant differ-ence in serum βHB levels between individuals carried and not carried APOE ε4 in the three groups(P>0.05).There was no statistically significant difference in the levels of urinary ketones among the three groups(P>0.05).There was no statistically significant difference in urine ketone bodies levels between individuals carried and not carried APOE ε4 in the three groups(P>0.05).Conclusion The reduced baseline levels of serum βHB in AD patients are associated with APOE ε4 allele.

Objective To investigate the fluctuations in the population density of Aedes albopictus and changes in the population density of Ae. albopictus in different geographical areas and different breeding habitats in Guangdong Province from 2018 to 2023, so as to provide insights into prevention and control of mosquito-borne infectious diseases in the province. Methods Ae. albopictus surveillance sites were assigned in 1 609 townships (streets) from 121 districts (counties) of 21 cities in Guangdong Province during the period between March and November from 2018 to 2023. The surveillance of the population density of Ae. albopictus was performed once a month in each surveillance site, and once a month in specific settings in cities where dengue were highly prevalent in Guangdong Province from December to February of the next year during the period from 2018 through 2023. Four streets (villages) were selected in each surveillance site according to the geographic orientation, and mosquito ovitraps were assigned in gardens, rooftops or public green belts at residential areas, parks, hospitals and construction sites. All mosquito ovitraps were collected, and the mosquito ovitrap index (MOI) was calculated. The population density of Ae. albopictus was classified into four grades in each surveillance site according to MOI, including no risk, low risk, medium risk and high risk. The risk classification of the Ae. albopictus density was analyzed in each surveillance site each year from 2018 to 2023, and the population density of Ae. albopictus was analyzed at different months and in different geographical areas and breeding habitats. Results A total of 118 241 Ae. albopictus surveillance sites were assigned in 21 cities of Guangdong Province from 2018 to 2023, and there were 68.26% of the surveillance sites with the population density of Ae. albopictus that met the requirements for dengue prevention and control, among which low, medium and high risk surveillance sites accounted for 23.61%, 6.67% and 1.47%. The risk classification of the Ae. albopictus density increased rapidly in Guangdong Province since April to May each year from 2018 to 2023, and then gradually reduced since September to October, with the peak during the period between May and July. The mean MOI was 4.21 at each surveillance site in Guangdong Province during the period from 2018 to 2023, with 4.69, 4.80, 4.38, 3.82, 3.38, and 4.33 from 2018 to 2023, respectively. The MOI was 4.35, 4.43, 3.53 and 3.58 in the Pearl River Delta region, and eastern, western, and northern Guangdong Province, respectively, and was 4.18, 5.44, 4.75, 3.24, 4.27 and 3.70 in residential areas, parks, construction sites, hospitals, waste collection stations, and other breeding habitats, respectively. Conclusions The population density of adult Ae. albopictus peaked in Guangdong Province during the period between May and July from 2018 to 2023, with a high density of Ae. albopictus in the Pearl River Delta region and eastern Guangdong Province. Targeted Ae. albopictus control measures are recommended to be implemented prior to the peak of the Ae. albopictus population density to reduce the development of mosquito-borne infectious diseases.

Objective:To prevent the possible effects of population aging and find out countermeasures to ensure the sustainable development of basic medical insurance fund balances.Methods:Using system dynamics,by coupling the three subsystems of basic medical insurance fund income,basic medical insurance fund expenditure,and population size,a causal relationship diagram and stock flow diagram are drawn to construct a system dynamics model,and Vensim Software is used for simulation.Results:Under the predicted natural conditions,the balance of the basic medical insurance fund will show a trend of first increasing and then decreasing from 2023 to 2030.Adjusting and combining the three variables of retirement strategy,outpatient visits,and participation rate into four solutions,among which simultaneously implementing the prediction plan of delaying retirement,expanding basic medical insurance coverage,and strengthening elderly health management can significantly reduce the decline of the basic medical insurance fund.Conclusion:The aging population will be detrimental to the sustainable development of the surplus of the basic medical insurance fund.Based on this,the following suggestions are proposed:implement appropriate delayed retirement policies to increase the income of the basic medical insurance fund;further expand the coverage of insured individuals to enhance the risk resistance of the basic medical insurance fund;strengthen the health management of the elderly to control the excessively rapid growth of the basic medical insurance fund expenditures.

Objective:To prevent the possible effects of population aging and find out countermeasures to ensure the sustainable development of basic medical insurance fund balances.Methods:Using system dynamics,by coupling the three subsystems of basic medical insurance fund income,basic medical insurance fund expenditure,and population size,a causal relationship diagram and stock flow diagram are drawn to construct a system dynamics model,and Vensim Software is used for simulation.Results:Under the predicted natural conditions,the balance of the basic medical insurance fund will show a trend of first increasing and then decreasing from 2023 to 2030.Adjusting and combining the three variables of retirement strategy,outpatient visits,and participation rate into four solutions,among which simultaneously implementing the prediction plan of delaying retirement,expanding basic medical insurance coverage,and strengthening elderly health management can significantly reduce the decline of the basic medical insurance fund.Conclusion:The aging population will be detrimental to the sustainable development of the surplus of the basic medical insurance fund.Based on this,the following suggestions are proposed:implement appropriate delayed retirement policies to increase the income of the basic medical insurance fund;further expand the coverage of insured individuals to enhance the risk resistance of the basic medical insurance fund;strengthen the health management of the elderly to control the excessively rapid growth of the basic medical insurance fund expenditures.

Objective:To prevent the possible effects of population aging and find out countermeasures to ensure the sustainable development of basic medical insurance fund balances.Methods:Using system dynamics,by coupling the three subsystems of basic medical insurance fund income,basic medical insurance fund expenditure,and population size,a causal relationship diagram and stock flow diagram are drawn to construct a system dynamics model,and Vensim Software is used for simulation.Results:Under the predicted natural conditions,the balance of the basic medical insurance fund will show a trend of first increasing and then decreasing from 2023 to 2030.Adjusting and combining the three variables of retirement strategy,outpatient visits,and participation rate into four solutions,among which simultaneously implementing the prediction plan of delaying retirement,expanding basic medical insurance coverage,and strengthening elderly health management can significantly reduce the decline of the basic medical insurance fund.Conclusion:The aging population will be detrimental to the sustainable development of the surplus of the basic medical insurance fund.Based on this,the following suggestions are proposed:implement appropriate delayed retirement policies to increase the income of the basic medical insurance fund;further expand the coverage of insured individuals to enhance the risk resistance of the basic medical insurance fund;strengthen the health management of the elderly to control the excessively rapid growth of the basic medical insurance fund expenditures.

Objective:To prevent the possible effects of population aging and find out countermeasures to ensure the sustainable development of basic medical insurance fund balances.Methods:Using system dynamics,by coupling the three subsystems of basic medical insurance fund income,basic medical insurance fund expenditure,and population size,a causal relationship diagram and stock flow diagram are drawn to construct a system dynamics model,and Vensim Software is used for simulation.Results:Under the predicted natural conditions,the balance of the basic medical insurance fund will show a trend of first increasing and then decreasing from 2023 to 2030.Adjusting and combining the three variables of retirement strategy,outpatient visits,and participation rate into four solutions,among which simultaneously implementing the prediction plan of delaying retirement,expanding basic medical insurance coverage,and strengthening elderly health management can significantly reduce the decline of the basic medical insurance fund.Conclusion:The aging population will be detrimental to the sustainable development of the surplus of the basic medical insurance fund.Based on this,the following suggestions are proposed:implement appropriate delayed retirement policies to increase the income of the basic medical insurance fund;further expand the coverage of insured individuals to enhance the risk resistance of the basic medical insurance fund;strengthen the health management of the elderly to control the excessively rapid growth of the basic medical insurance fund expenditures.

Objective:To prevent the possible effects of population aging and find out countermeasures to ensure the sustainable development of basic medical insurance fund balances.Methods:Using system dynamics,by coupling the three subsystems of basic medical insurance fund income,basic medical insurance fund expenditure,and population size,a causal relationship diagram and stock flow diagram are drawn to construct a system dynamics model,and Vensim Software is used for simulation.Results:Under the predicted natural conditions,the balance of the basic medical insurance fund will show a trend of first increasing and then decreasing from 2023 to 2030.Adjusting and combining the three variables of retirement strategy,outpatient visits,and participation rate into four solutions,among which simultaneously implementing the prediction plan of delaying retirement,expanding basic medical insurance coverage,and strengthening elderly health management can significantly reduce the decline of the basic medical insurance fund.Conclusion:The aging population will be detrimental to the sustainable development of the surplus of the basic medical insurance fund.Based on this,the following suggestions are proposed:implement appropriate delayed retirement policies to increase the income of the basic medical insurance fund;further expand the coverage of insured individuals to enhance the risk resistance of the basic medical insurance fund;strengthen the health management of the elderly to control the excessively rapid growth of the basic medical insurance fund expenditures.