BACKGROUND:Iron overload is an independent factor inducing osteoporosis,but the action mechanism is currently unclear.Therefore,exploring the effects of iron overload on osteoblast-related cells will help to deeply understand the pathogenesis of osteoporosis and provide potential strategies for osteoporosis treatment.OBJECTIVE:To explore the effects of iron overload environment on osteoblast precursor cell activity,ferroptosis,and osteogenic differentiation.METHODS:Osteoblast precursor cells(MC3T3-E1 cells)were divided into blank group,iron overload group,fer-1 group,and deferoxamine group.The iron overload group was treated with 300 μmol/L ammonium ferric citrate in the culture medium for 48 hours to simulate the iron overload microenvironment.The cells in fer-1 group and deferoxamine group were pretreated with 5 μmol/L antioxidant fer-1 and 5 μmol/L deferoxamine for 8 hours,respectively,and then added with 300 μmol/L ammonium ferric citrate for 48 hours.CCK-8 assay was used to determine the cell viability.Intracellular reactive oxygen species levels were detected employing a reactive oxygen species fluorescent probe.Changes in mitochondrial membrane potential were monitored with a mitochondrial membrane potential fluorescent probe.Mitochondrial morphology was observed employing transmission electron microscopy.Cellular glutathione levels were measured with a reduced glutathione colorimetric assay kit.Lipid peroxidation levels were assessed with a malondialdehyde colorimetric assay kit.Cellular ferrous ion levels were determined with a ferrous ion colorimetric assay kit.The osteogenic and mineralization capabilities of the cells were verified by alkaline phosphatase staining and alizarin red staining.Collagen secretion ability was detected using Sirius Red staining.The expression of osteogenic/ferroptosis-related genes and proteins was examined through reverse transcription quantitative polymerase chain reaction and western blot analysis.RESULTS AND CONCLUSION:(1)In an iron-overload environment,the mitochondrial membrane potential of cells decreased and their structure was compromised,with an elevation in intracellular lipid peroxidation levels and a downregulation of genes and proteins associated with ferroptosis resistance.However,pretreatment with fer-1 and deferoxamine led to an increase in mitochondrial membrane potential and partial restoration of morphology,a reduction in intracellular lipid peroxidation levels,and an upregulation of genes and proteins related to ferroptosis resistance.(2)In an iron-overload environment,the levels of cellular alkaline phosphatase,the formation of mineralized nodules,and the synthesis of collagen fibers were all found to be decreased.Pretreatment with fer-1 and deferoxamine was observed to upregulate the expression of osteogenic differentiation in cells.(3)In summary,iron overload could increase intracellular oxidative stress levels,mediate ferroptosis in MC3T3-E1 cells and inhibit osteogenic differentiation,thereby inducing osteoporosis.Therefore,maintaining iron homeostasis and inhibiting osteogenesis-related ferroptosis may be potential strategies to prevent or treat osteoporosis.

Objective To clarify the potential risk factors of disinfection and supply room,and explore the application effect of strengthening quality control management,so as to improve the service quality of disinfection and supply room and reduce the risk of medical accidents.Methods From January 2022 to December 2023,800 medical devices processed in a disinfection supply room were selected as the study subjects.They were randomly divided into two groups of 400 each:a control group receiv-ing conventional management and an observation group receiving enhanced quality control management.Statistical analysis was conducted on potential risk factors,and the work quality of the two groups was compared.Results Univariate and multivariate logistic regression analyses revealed that potential risk factors included insufficient professional competence of staff,deficiencies in the management system,infrequent departmental training,and a noisy work environment(P＜0.05).The observation group showed significantly higher qualified rates in various indicators,such as biological monitoring,compared to the control group(P＜0.05).Furthermore,the observation group experienced significantly fewer risk events than the control group(P＜0.05),indicating a statistically significant difference.Conclusion The primary potential risk factors in disinfection supply rooms in-clude systemic issues,staff quality,work environment,and training frequency.Addressing these factors by strengthening quality control management can improve staff professional competence,basic quality,and work attitude,thereby enhancing management quality,reducing the likelihood of risk events,and ultimately improving management safety.

BACKGROUND:Titanium implants are widely used in clinical practice because of their high strength and good biocompatibility.However,during implantation,bacterial infection and tissue damage environment produce a large number of reactive oxygen species,which can easily lead to delayed tissue healing and surgical failure.Consequently,the development of titanium implants with antimicrobial and antioxidant properties becomes paramount. OBJECTIVE:Considering the potent antimicrobial attributes of copper ions and the remarkable antioxidant qualities of polyphenols,we proposed the fabrication of polyphenol-mediated copper ion coatings on titanium surfaces.These coatings were subsequently assessed for their in vitro antimicrobial and antioxidant properties. METHODS:Nanostructures were generated on the titanium surface using the alkali thermal method.The titanium was immersed in a solution containing tannic acid and copper ions to achieve polyphenol-mediated copper ion coatings.The surface morphology and water contact angle were detected.The loading and release of copper ions were examined using atomic absorption spectroscopy.Staphylococcus aureus was inoculated on the surface of pure titanium sheet(blank group),alkali heat treated titanium sheet(control group),and polyphenol mediated copper ion modified titanium sheet(experimental group)to observe the bacterial survival status.Osteoblast precursor cells MC3T3-E1 were co-cultivated on the surface of three groups of titanium sheets to assess their antioxidant properties and bioactivity. RESULTS AND CONCLUSION:(1)Scanning electron microscopy showed that the polyphenol-mediated copper ion modified titanium sheet had rod-like nanostructures and no cracks on the surface.The surface hydrophilicity of copper ion modified titanium sheet mediated by polyphenol was close to that of pure titanium sheet.Atomic absorption spectrometry results showed a 51%increase in the loading capacity of copper ions after polyphenol mediation,with a uniform release of copper ions.(2)The antibacterial rates of titanium sheets in the blank group,control group,and experimental group were 0%,21.65%,and 93.75%,respectively.The live/dead staining and CTC staining showed that the live bacteria on the surface of titanium plates in the blank group were the most,and the live bacteria on the surface of titanium plates in the experimental group were the least.(3)The results of live/dead staining and CCK-8 assay showed that the three groups of titanium sheets had good cytocompatibility,and the titanium sheets in the experimental group were more conducive to the proliferation of MC3T3-E1 cells.Active oxygen fluorescence probe detection exhibited that compared with the other two groups,the fluorescence intensity of active oxygen on the surface of the experimental group was significantly reduced.The results of alkaline phosphatase and alizarin red S staining showed that the osteogenic differentiation and extracellular matrix mineralization of MC3T3-E1 cells on the surface of titanium sheets in the experimental group were stronger than those in the other two groups.(4)These results show that the polyphenol-mediated copper ion coating has strong antibacterial and antioxidant properties and promotes osteogenic differentiation.

Objective To establish a standardized supply model for ophthalmic surgical instruments using lean manage-ment methods,develop a formula for determining optimal instrument inventory levels,and improve the management efficiency of ophthalmic surgical instruments.Methods A total of 2,281 cataract instrument sets from January 2023 to December 2024 were analyzed.From January to December 2023(1 141 sets),conventional process management was implemented,while from January to December 2024(1 140 sets),a lean theory-based standardized model was applied.Key parameters including surgical time,sterilization workflow,and instrument management were recorded to establish the model.A quantitative analysis incorporating sur-gical time,turnover interval,transportation time,relaxation rate,cycle interval,and target instruments was conducted to derive the inventory formula.A two-month pilot study on cataract surgeries was performed to validate the model's feasibility.The inci-dence of special events before and after implementing the standardized model was compared.Results The formula-derived data aligned with clinical demands,demonstrating precise quantification of ophthalmic instrument sets and high process stability.The incidence of special events post-implementation was significantly lower than pre-implementation(P＜0.05).Conclusion The lean theory-based standardized supply model effectively enhances the management of ophthalmic surgical instruments.

Objective:To determine the best scoring system for assessing the severity of perioperative aortic dissection.Methods:All data were obtained from the Medical Information Mart for Intensive Care-Ⅳ(MIMIC-Ⅳ) database in the United States. The predictive value of the Acute Physiology Score Ⅲ(APS Ⅲ), Oxford Acute Severity of Illness Score (OASIS), Sequential Organ Failure Assessment (SOFA), Simplified Acute Physiology Score Ⅱ(SAPS Ⅱ), and Charlson Comorbidity Index (CCI) scoring systems were evaluated using the receiver operating characteristic ( ROC) curve. The area under the curve ( AUC) was used to determine the best predictive score, and the ideal cutoff value of the score was calculated based on the Youden index. Patients were divided into high and low groups according to the cutoff value. The Kaplan- Meier curve was used to show the impact on the survival rate of patients with aortic dissection. Results:ROC curve analysis showed that APS Ⅲ( AUC: 0.803, 95% CI: 0.721-0.885) was superior to SAPS Ⅱ( AUC: 0.767, 95% CI: 0.654-0.880), OASIS( AUC: 0.760, 95% CI: 0.635-0.885), SOFA( AUC: 0.753, 95% CI: 0.649-0.857), and CCI( AUC: 0.670, 95% CI: 0.524-0.817) in assessing in-hospital mortality. Based on the ROC curve and the Youden index calculation, the ideal cutoff value of the APS Ⅲ score was 57.5. Kaplan- Meier survival analysis showed that patients in the high group of APS Ⅲ had a shorter 28-day survival time. Patients in the high group of APS Ⅲ had a higher incidence of postoperative complications, and correlation analysis showed that patients in the high group of APS Ⅲ had a longer hospital stay. Conclusion:The APS Ⅲ scoring system is more valuable in predicting the 28-day mortality and prognosis of patients with aortic dissection.

Objective To establish a standardized supply model for ophthalmic surgical instruments using lean manage-ment methods,develop a formula for determining optimal instrument inventory levels,and improve the management efficiency of ophthalmic surgical instruments.Methods A total of 2,281 cataract instrument sets from January 2023 to December 2024 were analyzed.From January to December 2023(1 141 sets),conventional process management was implemented,while from January to December 2024(1 140 sets),a lean theory-based standardized model was applied.Key parameters including surgical time,sterilization workflow,and instrument management were recorded to establish the model.A quantitative analysis incorporating sur-gical time,turnover interval,transportation time,relaxation rate,cycle interval,and target instruments was conducted to derive the inventory formula.A two-month pilot study on cataract surgeries was performed to validate the model's feasibility.The inci-dence of special events before and after implementing the standardized model was compared.Results The formula-derived data aligned with clinical demands,demonstrating precise quantification of ophthalmic instrument sets and high process stability.The incidence of special events post-implementation was significantly lower than pre-implementation(P＜0.05).Conclusion The lean theory-based standardized supply model effectively enhances the management of ophthalmic surgical instruments.

BACKGROUND:Iron overload is an independent factor inducing osteoporosis,but the action mechanism is currently unclear.Therefore,exploring the effects of iron overload on osteoblast-related cells will help to deeply understand the pathogenesis of osteoporosis and provide potential strategies for osteoporosis treatment.OBJECTIVE:To explore the effects of iron overload environment on osteoblast precursor cell activity,ferroptosis,and osteogenic differentiation.METHODS:Osteoblast precursor cells(MC3T3-E1 cells)were divided into blank group,iron overload group,fer-1 group,and deferoxamine group.The iron overload group was treated with 300 μmol/L ammonium ferric citrate in the culture medium for 48 hours to simulate the iron overload microenvironment.The cells in fer-1 group and deferoxamine group were pretreated with 5 μmol/L antioxidant fer-1 and 5 μmol/L deferoxamine for 8 hours,respectively,and then added with 300 μmol/L ammonium ferric citrate for 48 hours.CCK-8 assay was used to determine the cell viability.Intracellular reactive oxygen species levels were detected employing a reactive oxygen species fluorescent probe.Changes in mitochondrial membrane potential were monitored with a mitochondrial membrane potential fluorescent probe.Mitochondrial morphology was observed employing transmission electron microscopy.Cellular glutathione levels were measured with a reduced glutathione colorimetric assay kit.Lipid peroxidation levels were assessed with a malondialdehyde colorimetric assay kit.Cellular ferrous ion levels were determined with a ferrous ion colorimetric assay kit.The osteogenic and mineralization capabilities of the cells were verified by alkaline phosphatase staining and alizarin red staining.Collagen secretion ability was detected using Sirius Red staining.The expression of osteogenic/ferroptosis-related genes and proteins was examined through reverse transcription quantitative polymerase chain reaction and western blot analysis.RESULTS AND CONCLUSION:(1)In an iron-overload environment,the mitochondrial membrane potential of cells decreased and their structure was compromised,with an elevation in intracellular lipid peroxidation levels and a downregulation of genes and proteins associated with ferroptosis resistance.However,pretreatment with fer-1 and deferoxamine led to an increase in mitochondrial membrane potential and partial restoration of morphology,a reduction in intracellular lipid peroxidation levels,and an upregulation of genes and proteins related to ferroptosis resistance.(2)In an iron-overload environment,the levels of cellular alkaline phosphatase,the formation of mineralized nodules,and the synthesis of collagen fibers were all found to be decreased.Pretreatment with fer-1 and deferoxamine was observed to upregulate the expression of osteogenic differentiation in cells.(3)In summary,iron overload could increase intracellular oxidative stress levels,mediate ferroptosis in MC3T3-E1 cells and inhibit osteogenic differentiation,thereby inducing osteoporosis.Therefore,maintaining iron homeostasis and inhibiting osteogenesis-related ferroptosis may be potential strategies to prevent or treat osteoporosis.

Objective To clarify the potential risk factors of disinfection and supply room,and explore the application effect of strengthening quality control management,so as to improve the service quality of disinfection and supply room and reduce the risk of medical accidents.Methods From January 2022 to December 2023,800 medical devices processed in a disinfection supply room were selected as the study subjects.They were randomly divided into two groups of 400 each:a control group receiv-ing conventional management and an observation group receiving enhanced quality control management.Statistical analysis was conducted on potential risk factors,and the work quality of the two groups was compared.Results Univariate and multivariate logistic regression analyses revealed that potential risk factors included insufficient professional competence of staff,deficiencies in the management system,infrequent departmental training,and a noisy work environment(P＜0.05).The observation group showed significantly higher qualified rates in various indicators,such as biological monitoring,compared to the control group(P＜0.05).Furthermore,the observation group experienced significantly fewer risk events than the control group(P＜0.05),indicating a statistically significant difference.Conclusion The primary potential risk factors in disinfection supply rooms in-clude systemic issues,staff quality,work environment,and training frequency.Addressing these factors by strengthening quality control management can improve staff professional competence,basic quality,and work attitude,thereby enhancing management quality,reducing the likelihood of risk events,and ultimately improving management safety.

Objective:To determine the best scoring system for assessing the severity of perioperative aortic dissection.Methods:All data were obtained from the Medical Information Mart for Intensive Care-Ⅳ(MIMIC-Ⅳ) database in the United States. The predictive value of the Acute Physiology Score Ⅲ(APS Ⅲ), Oxford Acute Severity of Illness Score (OASIS), Sequential Organ Failure Assessment (SOFA), Simplified Acute Physiology Score Ⅱ(SAPS Ⅱ), and Charlson Comorbidity Index (CCI) scoring systems were evaluated using the receiver operating characteristic ( ROC) curve. The area under the curve ( AUC) was used to determine the best predictive score, and the ideal cutoff value of the score was calculated based on the Youden index. Patients were divided into high and low groups according to the cutoff value. The Kaplan- Meier curve was used to show the impact on the survival rate of patients with aortic dissection. Results:ROC curve analysis showed that APS Ⅲ( AUC: 0.803, 95% CI: 0.721-0.885) was superior to SAPS Ⅱ( AUC: 0.767, 95% CI: 0.654-0.880), OASIS( AUC: 0.760, 95% CI: 0.635-0.885), SOFA( AUC: 0.753, 95% CI: 0.649-0.857), and CCI( AUC: 0.670, 95% CI: 0.524-0.817) in assessing in-hospital mortality. Based on the ROC curve and the Youden index calculation, the ideal cutoff value of the APS Ⅲ score was 57.5. Kaplan- Meier survival analysis showed that patients in the high group of APS Ⅲ had a shorter 28-day survival time. Patients in the high group of APS Ⅲ had a higher incidence of postoperative complications, and correlation analysis showed that patients in the high group of APS Ⅲ had a longer hospital stay. Conclusion:The APS Ⅲ scoring system is more valuable in predicting the 28-day mortality and prognosis of patients with aortic dissection.

Osteoporosis and knee osteoarthritis often co-occur and are closely related in terms of epidemiology， clinical symptoms， pathogenesis and other aspects. Therefore， it is necessary to manage the co-morbidity and treat the two as a whole. Based on the overall relationship between wei （痿） and bi （痹） in TCM， it is believed that osteoporosis and knee osteoarthritis have marrow loss and bone atrophy as the core pathogenesis of co-morbidity， and microfractures as the central pathological link. The overall treatment is rooted in boosting kidney， supplementing marrow and strengthening the bones. According to the pathological manifestations of microfractures in the process of co-morbidity， and the different deficiency and excess characteristics of wei and bi， it can be divided into three types， "wei emerging with mild bi"， "wei and bi progressing simultaneously"， and "emphasis on both wei and bi"， for treatment. In terms of "wei emerging with mild bi"， that is the early stage of osteoporosis， the traditional Daoyin （导引） is the main therapy. For "wei and bi progressing simultaneously"， it can be divided into three stages further， including the onset stage， remission stage， and recovery stage of knee pain， treated with Taohong Siwu Decoction （桃红四物汤）， Bushen Huoxue Formula （补肾活血方） and self-made Bushen Qianggu Formula （补肾强骨方） as the main formula respectively. For "emphasis on both wei and bi"， the proven formula， Qianggu Zhitong Formula （强骨止痛方）， is taken as the main prescription.