AIM: As a human basement membrane-derived inhibitor of angiogenesis and tumor growth, canstatin has been paid great attention since it was isolated and identified in 2000. Canstatin significantly inhibited human endot...AIM: As a human basement membrane-derived inhibitor of angiogenesis and tumor growth, canstatin has been paid great attention since it was isolated and identified in 2000. Canstatin significantly inhibited human endothelial cell migration and proliferation and induced apoptosis, suggesting that it might be a powerful and potential therapeutic molecule for atherosclerosis,unstable angina and tumor.展开更多
目的探讨在心脏射频消融术中防护舱对第1及第2术者的防护效果。方法将实时剂量仪贴附在术者主要体表部位,包括100、120、140和160 cm 4个高度,采取心脏射频消融术常用投影体位(正位,左侧位,右前斜位30°及左前斜位45°),在无防...目的探讨在心脏射频消融术中防护舱对第1及第2术者的防护效果。方法将实时剂量仪贴附在术者主要体表部位,包括100、120、140和160 cm 4个高度,采取心脏射频消融术常用投影体位(正位,左侧位,右前斜位30°及左前斜位45°),在无防护装置下及防护舱防护下分别测量第1及第2术者各部位剂量率,并计算剂量衰减率。剂量衰减率=(无防护剂量率-有防护剂量率)/无防护剂量率×100%。结果防护舱防护下,第1术者辐射剂量率为(0.5±0.1)μSv/min,剂量衰减率高达99%以上。第2术者的辐射剂量率为(0.5±0.1)～(1.2±0.2)μSv/min,除了100～120 cm在右前斜30°的辐射防护略差[剂量率为(1.1±0.1)μSv/min;衰减率,80.7%],其余投照体位的辐射衰减率均在90%以上。结论使用辐射防护舱可以有效地提供辐射防护,不仅可以大大降低第1术者的辐射暴露,对第2术者也有辐射防护效果。展开更多
文摘AIM: As a human basement membrane-derived inhibitor of angiogenesis and tumor growth, canstatin has been paid great attention since it was isolated and identified in 2000. Canstatin significantly inhibited human endothelial cell migration and proliferation and induced apoptosis, suggesting that it might be a powerful and potential therapeutic molecule for atherosclerosis,unstable angina and tumor.
文摘目的探讨在心脏射频消融术中防护舱对第1及第2术者的防护效果。方法将实时剂量仪贴附在术者主要体表部位,包括100、120、140和160 cm 4个高度,采取心脏射频消融术常用投影体位(正位,左侧位,右前斜位30°及左前斜位45°),在无防护装置下及防护舱防护下分别测量第1及第2术者各部位剂量率,并计算剂量衰减率。剂量衰减率=(无防护剂量率-有防护剂量率)/无防护剂量率×100%。结果防护舱防护下,第1术者辐射剂量率为(0.5±0.1)μSv/min,剂量衰减率高达99%以上。第2术者的辐射剂量率为(0.5±0.1)～(1.2±0.2)μSv/min,除了100～120 cm在右前斜30°的辐射防护略差[剂量率为(1.1±0.1)μSv/min;衰减率,80.7%],其余投照体位的辐射衰减率均在90%以上。结论使用辐射防护舱可以有效地提供辐射防护,不仅可以大大降低第1术者的辐射暴露,对第2术者也有辐射防护效果。
