放射性核素能经呼吸道、消化遭和伤口等途径进入机体,从而对机体造成危害。在核工业领域中,特别是意外事故时,放射性核素以气溶胶形式经呼吸道吸入所造成的危害最大,故该摄入途径最具有实际意义。经上述途径吸入的放射性颗粒又可分为可溶性的和难溶性的两种。对于前者,使用氨羟型络合剂(如DT PA等)能获得比较满意的疗效。对于后者,由于其不易进入细胞外液,长期沉积在肺 Radionuclides can enter the body through the respiratory tract, digestion and wounds and other means, thus causing harm to the body. In the nuclear industry, especially in accidents, the most harmful effects of radionuclide inhalation through the respiratory tract in the form of aerosol are most significant, so this route of intake has the most practical significance. Radioactive particles inhaled by the above route can be divided into two kinds of soluble and insoluble. For the former, the use of ammonia-type complexing agent (such as DT PA, etc.) can get more satisfactory results. For the latter, long-term deposition in the lungs due to its poor accessibility to the extracellular fluid