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直到晚近,才广泛地公认可以确立一个血铅阈限值,在此数值之下,不出现中毒的症状和体征。1961年Kehoe提出了以80微克/100克(或100毫升)为临界值,在此数之下,不致于中毒。有时有误解,此值被解释为血铅要在80微克/100克以上,才是铅中毒,这不是Kehoe的原意。80微克这个阈限值是从铅作业职工中得到的,因此也只能应用于这些人群。但是,实际上却常用来诊断那些无铅作业接触史的中毒病人,特别是儿童对铅的毒性作用更为敏感,不能应用这个阈限值。目前,能否确定对机体无害的血铅浓
Until recently, it was widely accepted that a blood lead threshold could be established at which no signs and symptoms of poisoning occurred. In 1961 Kehoe proposed a threshold of 80 micrograms / 100 grams (or 100 milliliters) below which no toxicity was observed. Sometimes misunderstood, this value is interpreted as blood lead at 80 micrograms / 100 grams above, is lead poisoning, this is not Kehoe’s intent. The threshold of 80 micrograms is obtained from lead workers and therefore applies only to these populations. However, poisoning patients who are commonly used to diagnose the history of lead-free exposure, especially children, are more susceptible to the toxic effects of lead and can not apply this threshold. At present, can determine the harmless blood lead