Arteriovenous fistula(AVF)calcification is a common complication in hemodialysis patients that leads to AVF dysfunction and decreases the AVF survival,but the mechanisms of AVF calcification,especially the role of hem...Arteriovenous fistula(AVF)calcification is a common complication in hemodialysis patients that leads to AVF dysfunction and decreases the AVF survival,but the mechanisms of AVF calcification,especially the role of hemodynamic changes in AVF calcification have not been fully investigated.In this study,a computational fluid dynamics(CFD)model was carried out based on AVF,at the distal anastomosis of the cephalic vein and radial artery,generated from a patient-specific computed tomography(CT)angiography and Doppler ultrasound image.Hemodynamic factors were considered to explore the mechanisms responsible for the initiation and progression of AVF calcification.Five stages in one cardiac cycle were chosen to be studied for the velocity field,pressure,time-averaged wall shear stress(TAWSS),and oscillatory shear index(OSI).Blood pressure was higher in the arteriovenous anastomosis,and variations of great amplitude of pressure were examined during the cardiac cycle.Blood pressure,transient shear stress,TAWSS,and OSI were higher in the arteriovenous anastomosis and at the bottom of expanded outflow vein,and these sites were highly consistent with the calcified areas shown on CT angiography.On the contrary,no calcification was found in sites where streamline was stable,blood pressure did not change dramatically,as well as TAWSS and OSI were lower.It was shown that AVF calcification was correlated with hemodynamic changes,which may contribute to further understanding the mechanisms of AVF calcification and providing scientific evidence to inform the optimization of surgical strategies and the development of personalized interventional measures in clinical contexts.展开更多
目的对维持性血液透析男性患者性功能障碍发生率及影响因素进行Meta分析,为临床指南制定及实践提供参考依据。方法系统检索中国知网、万方、维普、中国生物医学文献数据库、中华医学会期刊全文数据库、PubMed、Embase、Cochrane Library...目的对维持性血液透析男性患者性功能障碍发生率及影响因素进行Meta分析,为临床指南制定及实践提供参考依据。方法系统检索中国知网、万方、维普、中国生物医学文献数据库、中华医学会期刊全文数据库、PubMed、Embase、Cochrane Library、Web of Science数据库,从建库到2025年7月1日公开发表的关于维持性血液透析男性患者性功能障碍调查现状或影响因素的文献报告。由2名研究员独立按照文献的纳入和排除标准筛选文献,进行文献的方法学质量评价及资料提取。采用RevMan5.4软件进行Meta分析。结果共纳入12篇文献、17项影响因素,样本量共计2923例。结果显示,维持性血液透析男性患者性功能障碍的发生率为72.00%(95%CI:65.00%~79.00%)。年龄较大(OR=1.38,95%CI:1.34~1.54)、抑郁(OR=1.75,95%CI:1.39~2.19)、患有糖尿病(OR=2.37,95%CI:1.87~3.01)、服用β-受体阻滞剂(OR=2.85,95%CI:1.66~3.14)、文化程度低(OR=2.49,95%CI:1.49~4.18)及生殖激素水平异常(OR=7.10,95%CI:2.10~24.02)是维持性血液透析男性患者性功能障碍的危险因素。结论维持性血液透析男性患者性功能障碍发生率较高,且影响因素较多。应积极提高医护人员风险识别能力,进行必要的干预,以改善患者的生活质量。展开更多
摘要目的探讨血钾变异性与维持性血液透析(maintenance hemodialysis,MHD)患者长期预后的关系。方法选取2018年1月在首都医科大学附属北京潞河医院血液透析中心接受MHD的患者为研究对象,并随访至2024年4月。血钾变异性定义为2017年1月至2017年12月血钾的变异系数。根据血钾变异系数的中位数分为高钾变异组(0.0802~0.2159)和低钾变异组(0.0265~0.0801),比较两组患者的临床特点。使用Kaplan-Meier绘制生存曲线,Log-rank检验比较两组间的生存率差异;用Cox比例风险模型分析血钾变异性与MHD患者全因死亡的关系。结果本研究共纳入213例患者,其中58.2%为男性,平均年龄(59.1±13.4)岁,中位透析龄4.4(2.7,6.9)年,中位随访时间6.0(2.5,6.25)年。在随访期内,104例患者死亡,死亡率48.8%,其中心血管死亡52例(50.0%),感染死亡18例(17.3%),脑血管死亡15例(14.4%)。Kaplan-Meier曲线显示高钾变异组全因病死率高于低钾变异组(Log-rank,χ2=9.119,P=0.025)。多因素Cox回归分析显示,在调整了年龄、白蛋白、血肌酐、尿素清除指数(urea clearance index value,Kt/V)等潜在混杂因素后,高钾变异组全因死亡风险高于低钾变异性组(HR=1.537,95%CI:1.026~2.302)。结论血钾变异性与MHD患者全因死亡相关。MHD患者应密切监测血钾水平及其变异性。
基金supported by the Scientific Program of Tianjin Municipal Education Commission(Natural Science,Grant No.2022KJ254)Science Foundation of the Second Hospital of Tianjin Medical University(Grant No.2021ydey05)Tianjin Municipal Health Commission Integrated Traditional Chinese and Western Medicine Project(Grant No.2021173).
摘要Arteriovenous fistula(AVF)calcification is a common complication in hemodialysis patients that leads to AVF dysfunction and decreases the AVF survival,but the mechanisms of AVF calcification,especially the role of hemodynamic changes in AVF calcification have not been fully investigated.In this study,a computational fluid dynamics(CFD)model was carried out based on AVF,at the distal anastomosis of the cephalic vein and radial artery,generated from a patient-specific computed tomography(CT)angiography and Doppler ultrasound image.Hemodynamic factors were considered to explore the mechanisms responsible for the initiation and progression of AVF calcification.Five stages in one cardiac cycle were chosen to be studied for the velocity field,pressure,time-averaged wall shear stress(TAWSS),and oscillatory shear index(OSI).Blood pressure was higher in the arteriovenous anastomosis,and variations of great amplitude of pressure were examined during the cardiac cycle.Blood pressure,transient shear stress,TAWSS,and OSI were higher in the arteriovenous anastomosis and at the bottom of expanded outflow vein,and these sites were highly consistent with the calcified areas shown on CT angiography.On the contrary,no calcification was found in sites where streamline was stable,blood pressure did not change dramatically,as well as TAWSS and OSI were lower.It was shown that AVF calcification was correlated with hemodynamic changes,which may contribute to further understanding the mechanisms of AVF calcification and providing scientific evidence to inform the optimization of surgical strategies and the development of personalized interventional measures in clinical contexts.
摘要目的对维持性血液透析男性患者性功能障碍发生率及影响因素进行Meta分析,为临床指南制定及实践提供参考依据。方法系统检索中国知网、万方、维普、中国生物医学文献数据库、中华医学会期刊全文数据库、PubMed、Embase、Cochrane Library、Web of Science数据库,从建库到2025年7月1日公开发表的关于维持性血液透析男性患者性功能障碍调查现状或影响因素的文献报告。由2名研究员独立按照文献的纳入和排除标准筛选文献,进行文献的方法学质量评价及资料提取。采用RevMan5.4软件进行Meta分析。结果共纳入12篇文献、17项影响因素,样本量共计2923例。结果显示,维持性血液透析男性患者性功能障碍的发生率为72.00%(95%CI:65.00%~79.00%)。年龄较大(OR=1.38,95%CI:1.34~1.54)、抑郁(OR=1.75,95%CI:1.39~2.19)、患有糖尿病(OR=2.37,95%CI:1.87~3.01)、服用β-受体阻滞剂(OR=2.85,95%CI:1.66~3.14)、文化程度低(OR=2.49,95%CI:1.49~4.18)及生殖激素水平异常(OR=7.10,95%CI:2.10~24.02)是维持性血液透析男性患者性功能障碍的危险因素。结论维持性血液透析男性患者性功能障碍发生率较高,且影响因素较多。应积极提高医护人员风险识别能力,进行必要的干预,以改善患者的生活质量。