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注射二巯基丁二酸钠(Na-DMS)治疗铅绞痛,对绞痛的缓解时间和尿排铅量的增加,都与依地酸二钠钙(Ca-Na_2-EDTA)相似。Na-DMS含有两个巯基,并且由尿排锌不多,治疗后,绝大多数患者的血ALAD活力恢复正常。Ca-Na_2-EDTA不含巯基并由尿中大量排锌,治疗后血ALAD活力恢复很微,即使每日补锌,ALAD活力的恢复仍然远低于Na-DMS,考虑 Ca-Na_2-EDTA的肾脏毒性,因此认为在铅中毒治疗中,Na-DMS优于Ca-Na_2-EDTA。
Injection of sodium dimercaptosuccinate (Na-DMS) for the treatment of lead colic, colic relief of time and lead excretion of urine, are similar to calcium disodium edetate (Ca-Na 2-EDTA). Na-DMS contains two thiol groups, and not much urine zinc row, after treatment, the vast majority of patients with blood ALAD vitality returned to normal. Ca-Na 2-EDTA does not contain sulfhydryl groups and is excreted by urine. After treatment, the recovery of ALAD activity is very slight. Even after daily zinc supplementation, the recovery of ALAD activity is still far lower than that of Na-DMS. Considering the effect of Ca-Na 2-EDTA Therefore, Na-DMS is superior to Ca-Na 2-EDTA in the treatment of lead poisoning.