Metal debris from metal-on-metal (MoM) total hip arthroplasties (THA) has been suspected to cause periprosthetic heterotopic ossifications (HO). We determined the influence of disseminated cobalt, chromium and molybde...Metal debris from metal-on-metal (MoM) total hip arthroplasties (THA) has been suspected to cause periprosthetic heterotopic ossifications (HO). We determined the influence of disseminated cobalt, chromium and molybdenum on the development of HO. Native blood samples from patients with 86 high-carbon and 16 low-carbon Co28Cr6Mo articulations were analysed by high-resolution inductively coupled plasma mass-spectrometry (HR ICP-MS). The results revealed that high-carbon metal-on-metal articulations showed lower metal blood levels (Co 1.03 to 1.60 μg/l, Cr 0.77 to 0.88 μg/l, Mo 0.45 to 0.56 μg/l) whereas low-carbon articulations achieved higher metal blood levels (Co 2.59 to 6.85 μg/l, Cr 1.25 to 3.55 μg/l, Mo 0.45 to 0.64 μg/l), but no correlation between metal ion blood level or carbon content and the development of HO could be found in these MoM articulations. Hence, metal debris from MoM articulation does not stimulate heterotopic bone formation despite other well-known local reactions.展开更多
研究建立了四级杆碰撞反应池-ICP-MS法(Inductively coupled plasma mass spectrometry,ICP-MS)测定维生素及其预混料中铅、总砷和总汞的检测方法。样品加入硝酸,经微波消解后定容至100 m L,待测液采用四级杆碰撞反应池-ICP-MS法进行测...研究建立了四级杆碰撞反应池-ICP-MS法(Inductively coupled plasma mass spectrometry,ICP-MS)测定维生素及其预混料中铅、总砷和总汞的检测方法。样品加入硝酸,经微波消解后定容至100 m L,待测液采用四级杆碰撞反应池-ICP-MS法进行测定。由于汞易挥发,实验中优化了消解的温度。维生素B_(12)样品中存在钴元素的干扰,以^(75)砷(As)和内标元素^(73)锗(Ge)的信号强度比值与砷元素的浓度成正比,采用碰撞反应池技术、氦气动能歧视(Kinetic energy discrimination,KED)模式进行定量分析,计算结果为样品中As和Co-O结合物的总含量;再以^(59)钴(Co)和内标元素^(45)钪(Sc)的信号强度比值与钴元素的浓度成正比,采用同样方法进行定量分析,得出钴的含量。最后通过计算两者之差得出样品中砷的含量。试验结果表明:铅、总砷和钴在1.0~50.0μg/L范围内线性关系良好,相关系数R均大于0.999。在不同加标水平下,3种元素的回收率范围在88.3%~104.3%之间,汞在0.1~2.0μg/L范围内线性关系良好,相关系数R为0.998。在不同加标水平下,汞元素的回收率范围在88.3%~104.3%之间,相对标准偏差(RSD)均小于10%。该方法操作简便、快速准确,适用于维生素及其预混料中铅、总砷、总汞元素的同时检测。展开更多
文摘Metal debris from metal-on-metal (MoM) total hip arthroplasties (THA) has been suspected to cause periprosthetic heterotopic ossifications (HO). We determined the influence of disseminated cobalt, chromium and molybdenum on the development of HO. Native blood samples from patients with 86 high-carbon and 16 low-carbon Co28Cr6Mo articulations were analysed by high-resolution inductively coupled plasma mass-spectrometry (HR ICP-MS). The results revealed that high-carbon metal-on-metal articulations showed lower metal blood levels (Co 1.03 to 1.60 μg/l, Cr 0.77 to 0.88 μg/l, Mo 0.45 to 0.56 μg/l) whereas low-carbon articulations achieved higher metal blood levels (Co 2.59 to 6.85 μg/l, Cr 1.25 to 3.55 μg/l, Mo 0.45 to 0.64 μg/l), but no correlation between metal ion blood level or carbon content and the development of HO could be found in these MoM articulations. Hence, metal debris from MoM articulation does not stimulate heterotopic bone formation despite other well-known local reactions.
文摘研究建立了四级杆碰撞反应池-ICP-MS法(Inductively coupled plasma mass spectrometry,ICP-MS)测定维生素及其预混料中铅、总砷和总汞的检测方法。样品加入硝酸,经微波消解后定容至100 m L,待测液采用四级杆碰撞反应池-ICP-MS法进行测定。由于汞易挥发,实验中优化了消解的温度。维生素B_(12)样品中存在钴元素的干扰,以^(75)砷(As)和内标元素^(73)锗(Ge)的信号强度比值与砷元素的浓度成正比,采用碰撞反应池技术、氦气动能歧视(Kinetic energy discrimination,KED)模式进行定量分析,计算结果为样品中As和Co-O结合物的总含量;再以^(59)钴(Co)和内标元素^(45)钪(Sc)的信号强度比值与钴元素的浓度成正比,采用同样方法进行定量分析,得出钴的含量。最后通过计算两者之差得出样品中砷的含量。试验结果表明:铅、总砷和钴在1.0~50.0μg/L范围内线性关系良好,相关系数R均大于0.999。在不同加标水平下,3种元素的回收率范围在88.3%~104.3%之间,汞在0.1~2.0μg/L范围内线性关系良好,相关系数R为0.998。在不同加标水平下,汞元素的回收率范围在88.3%~104.3%之间,相对标准偏差(RSD)均小于10%。该方法操作简便、快速准确,适用于维生素及其预混料中铅、总砷、总汞元素的同时检测。
