BACKGROUND: It is inaccurate to reflect the level of dust exposure through working years. Furthermore, identifying a predictive indicator for lung function decline is significant for coal miners. The study aimed to explored whether club cell secretory protein (CC16) levels can reflect early lung function changes. METHODS: The cumulative respiratory dust exposure (CDE) levels of 1,461 coal miners were retrospectively assessed by constructed a job-exposure matrix to replace working years. Important factors affecting lung function and CC16 were selected by establishing random forest models. Subsequently, the potential of CC16 to reflect lung injury was explored from multiple perspectives. First, restricted cubic spline (RCS) models were used to compare the trends of changes in lung function indicators and plasma CC16 levels after dust exposure. Then mediating analysis was performed to investigate the role of CC16 in the association between dust exposure and lung function decline. Finally, the association between baseline CC16 levels and follow-up lung function was explored. RESULTS: The median CDE were 35.13 mg/m³-years. RCS models revealed a rapid decline in forced vital capacity (FVC), forced expiratory volume in the first second (FEV₁), and their percentages of predicted values when CDE exceeded 25 mg/m³-years. The dust exposure level (<5 mg/m³-years) causing significant changes in CC16 was much lower than the level (25 mg/m³-years) that caused changes in lung function indicators. CC16 mediated 11.1% to 26.0% of dust-related lung function decline. Additionally, workers with low baseline CC16 levels experienced greater reductions in lung function in the future. CONCLUSIONS CC16 levels are more sensitive than lung indicators in reflecting early lung function injury and plays mediating role in lung function decline induced by dust exposure. Low baseline CC16 levels predict poor future lung function.
Uteroglobin/blood* ; Humans ; Dust/analysis* ; Occupational Exposure/analysis* ; Male ; Middle Aged ; Adult ; Retrospective Studies ; Lung Injury/chemically induced* ; Coal Mining ; Biomarkers/blood* ; China/epidemiology* ; Air Pollutants, Occupational ; Female

To promote the understanding of the requirements of sheet for oral solid preparation in the Pharmacopoeia of the People's Republic of China(2025 edition)and improve the quality control level of related parties in production and use,the key quality control items specified in Pharmacopoeia of the People's Republic of China and the testing points were analyzed and discussed combined with the current situation of sheet for oral solid preparation industry and relevant standards at home and abroad.Suggestion was given that quality control should be carried out according to product characteristics,application,production process,and risk assessment,and reasonable limits should be set.

Objective To analyze the obstacles and promoting factors of NICU nurses postural management of mechanically ventilated premature infants,and to provide reference for improving the postural management quality of mechanically ventilated premature infants.Methods From March to May 2024,12 nurses in NICU of 4 Grade A hospitals in were subjected by objective sampling during the period of phenomenological study,and investigated by semi-structured in-depth interviews.Colaizzi seven-step analysis was used for sorting out the interview data and analyzing the topics.Results The promoting factors for position management of premature infants on mechanical ventilation include empirical management,sense of responsibility,empathy,professional identity and reflection and summary;the hindering factors include nurses'lack of cognition of position management,lack of knowledge of position management,existence of risks and hidden dangers,improper allocation of human resources,difficulty in transforming scientific research achievements and lack of position management plans.Conclusion NICU nurses have obstacles and promoters to posture management of premature infants with mechanical ventilation,and intervention can improve posture management quality of premature infants with mechanical ventilation.

Objective:To establish a rapid and precise dose measurement method with EBT4 film and ensure its measurement accuracy to be within the required range through strict operational procedures for the purpose of addressing the two essential issues of poor measurement accuracy and timeliness of EBT film under FLASH conditions.Methods:After storing under different humidity conditions for a certain period of time, the film was exposed to radiation for analyzing the influence of air humidity on the intrinsic performance of EBT film. By means of repeated scanning operations and the film angle rotation, the influences of repeated scanning and film placement angle were analuzed. Parabolic correction method was used to reduce the spatial position influence during the scanning process. By analying the relationship between net optical density (netOD) and absorbed dose through the comparison of three fitting method, the optimal fitting curve was selected. After irradiation of the same batch of films for 5 min and 24 h, the film doses were calibrated and then compared with ionization chamber-measured result. The rapid and precise film dosimetry method was used to measure both the percentage depth dose from X-rays at ultra-high dose rate and the dose distribution at a depth of 2 cm in water.Results:Air humidity had the greatest influence on the intrinsic performance of EBT film (approximately 20%). The average deviation of repeated scans is within 0.5%. The angle at which the film is placed significantly affected the readouts of the film with the maximum influence approximately 70%. The net optical density combined with polynomial fitting can control the fitting residuals of 1-16 Gy within 3%. The change rate of light channels at 5 min already mostly met the requirements of the rapid mode (< 0.5%). Compared with the measurement result obtained using the reference ionization chamber, the deviations of the 5 min or 24 h dose calibration curves were all within 2%.Conclusions:The EBT4 film can be employed as a precise dosimeter to quickly measure the FLASH radiation dose. Rapid and precise FLASH dose measurements can meet the stringent requirements of both preclinical and clinical FLASH research.

Objective To analyze the epidemiological characteristics of acute respiratory infections(ARIs)during the autumn-winter season in Beijing,providing evidence for the prevention,control,diagnosis,and treatment of ARIs.Methods A convenience sampling method was employed,enrolling patients who visited Peking Union Medical College Hospital(PUMCH)between September 2023 and February 2024 due to ARIs.Na-sopharyngeal swabs were collected,and real-time fluorescence quantitative PCR was used to detect six common respiratory pathogens[influenza A virus(FluA),influenza B virus(FluB),human rhinovirus(HRV),Myco-plasma pneumoniae(MP),respiratory syncytial virus(RSV),and adenovirus(ADV)],as well as SARS-CoV-2 infection.The distribution patterns of pathogen infections were analyzed.Results A total of 5556 eligible patients were included.The overall positivity rate for the six common respiratory pathogens was 63.7％,with sin-gle-pathogen positivity at 54.0％,dual-pathogen positivity at 8.9％,and triple or more pathogen positivity at 0.7％.The predominant pathogens detected were FluA(16.1％)and RSV(15.7％),followed by ADV(11.1％),MP(11.1％),HRV(10.0％),and FluB(10.0％).No significant difference in overall pathogen positivity was observed between genders.However,significant differences were found between autumn and winter(x2=34.617,P＜0.001)and among pediatric,young/middle-aged,and elderly patients(x2=422.38,P＜0.001).Specifically,MP(x2=8.647,P=0.003),FluA(x2=131.932,P＜0.001),and HRV(x2=174.199,P＜0.001)exhibited significantly higher positivity rates in autumn than in winter,whereas FluB was more prevalent in winter(x2=287.894,P＜0.001).In pediatric patients,MP,RSV,HRV,and ADV positivity rates were significantly higher than in young/middle-aged and elderly patients(all P＜0.001),whereas FluB was more common in young/middle-aged patients(both P＜0.001).The positivity rates of the six common respiratory pathogens significantly declined during the SARS-CoV-2 epidemic period,exhibiting an asynchronous seasonal pattern.Conclusions The prevalence of respiratory pathogens in Beijing is associated with age and season.Tar-geted preventive measures should be implemented in different seasons and for key populations.

Objective To assist drug and pharmaceutical packaging material manufacturers in understanding and utilizing the functionality evaluation methods for prefilled syringe with Luer conical fittings,thereby scientifically specifying product quality.Methods By comparing the standards status both domestically and internationally,and in conjunction with the product characteristics,production,and actual usage situation of prefilled syringe with Luer conical fittings,the test contents and key points of related functionality evaluation methods were analyzed.Results The functionality evaluation methods for prefilled syringe with Luer conical fittings represent improvements and supplements to domestic standard,appropriate methods should be selected based on the product type.Conclusion Developing functionality evaluation methods for prefilled syringe with Luer conical fittings will provide guidance to standardized quality control for drug and pharmaceutical packaging material manufacturers.It will also better meet the requirements for market regulation,and is an effective way to promote the overall development of the industry.

Objective To analyze the obstacles and promoting factors of NICU nurses postural management of mechanically ventilated premature infants,and to provide reference for improving the postural management quality of mechanically ventilated premature infants.Methods From March to May 2024,12 nurses in NICU of 4 Grade A hospitals in were subjected by objective sampling during the period of phenomenological study,and investigated by semi-structured in-depth interviews.Colaizzi seven-step analysis was used for sorting out the interview data and analyzing the topics.Results The promoting factors for position management of premature infants on mechanical ventilation include empirical management,sense of responsibility,empathy,professional identity and reflection and summary;the hindering factors include nurses'lack of cognition of position management,lack of knowledge of position management,existence of risks and hidden dangers,improper allocation of human resources,difficulty in transforming scientific research achievements and lack of position management plans.Conclusion NICU nurses have obstacles and promoters to posture management of premature infants with mechanical ventilation,and intervention can improve posture management quality of premature infants with mechanical ventilation.

Objective:To establish a rapid and precise dose measurement method with EBT4 film and ensure its measurement accuracy to be within the required range through strict operational procedures for the purpose of addressing the two essential issues of poor measurement accuracy and timeliness of EBT film under FLASH conditions.Methods:After storing under different humidity conditions for a certain period of time, the film was exposed to radiation for analyzing the influence of air humidity on the intrinsic performance of EBT film. By means of repeated scanning operations and the film angle rotation, the influences of repeated scanning and film placement angle were analuzed. Parabolic correction method was used to reduce the spatial position influence during the scanning process. By analying the relationship between net optical density (netOD) and absorbed dose through the comparison of three fitting method, the optimal fitting curve was selected. After irradiation of the same batch of films for 5 min and 24 h, the film doses were calibrated and then compared with ionization chamber-measured result. The rapid and precise film dosimetry method was used to measure both the percentage depth dose from X-rays at ultra-high dose rate and the dose distribution at a depth of 2 cm in water.Results:Air humidity had the greatest influence on the intrinsic performance of EBT film (approximately 20%). The average deviation of repeated scans is within 0.5%. The angle at which the film is placed significantly affected the readouts of the film with the maximum influence approximately 70%. The net optical density combined with polynomial fitting can control the fitting residuals of 1-16 Gy within 3%. The change rate of light channels at 5 min already mostly met the requirements of the rapid mode (< 0.5%). Compared with the measurement result obtained using the reference ionization chamber, the deviations of the 5 min or 24 h dose calibration curves were all within 2%.Conclusions:The EBT4 film can be employed as a precise dosimeter to quickly measure the FLASH radiation dose. Rapid and precise FLASH dose measurements can meet the stringent requirements of both preclinical and clinical FLASH research.

Objective To assist drug and pharmaceutical packaging material manufacturers in understanding and utilizing the functionality evaluation methods for prefilled syringe with Luer conical fittings,thereby scientifically specifying product quality.Methods By comparing the standards status both domestically and internationally,and in conjunction with the product characteristics,production,and actual usage situation of prefilled syringe with Luer conical fittings,the test contents and key points of related functionality evaluation methods were analyzed.Results The functionality evaluation methods for prefilled syringe with Luer conical fittings represent improvements and supplements to domestic standard,appropriate methods should be selected based on the product type.Conclusion Developing functionality evaluation methods for prefilled syringe with Luer conical fittings will provide guidance to standardized quality control for drug and pharmaceutical packaging material manufacturers.It will also better meet the requirements for market regulation,and is an effective way to promote the overall development of the industry.