依地酸二钠钙(CaNa_2—EDTA)驱镉的临床观察报导很少,我们在某厂镉作业工人健康情况六年动态观察的基础上,于1979年5月收治了4例慢性镉中毒症状比较明显的工人,进行驱镉的临床观察,现报告如下: 职业接触情况本组4例患者均从事过镉回收工作。在粉碎、投料、电解、熔镉、铸锭过程中有含镉粉尘、蒸气及烟逸出,生产场所空气中氧化镉的浓度1973年以双硫腙比色法测定,平均为 Edetate disodium calcium (CaNa_2-EDTA) cadmium cadmium rarely reported in the clinical observation of cadmium workers in our factory six years of dynamic state of health based on the observation, in May 1979 admitted to four cases of chronic cadmium poisoning symptoms More obvious workers to carry out cadmium cadmium clinical observations are reported as follows: Occupational exposure 4 patients in this group have been engaged in cadmium recycling. In the crushing, feeding, electrolysis, melting cadmium, ingot ingot process containing cadmium dust, steam and smoke escaped, the concentration of cadmium in the air at the production site measured by dithizone colorimetric method, with an average of