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迄今在医学毒理学领域中占统治地位的是,认为铅中毒是一种具有阈值性的疾患(threshold illness)。按照这种“阈值观点”,只有血铅达到或超过某一特定水平(60～80μg/100 ml)时,才会出现症状,血铅水平与临床表现必定一致;对中毒早期临床表现尚不够明显和特异时,则不承认铅的病因。
So far in the field of medical toxicology, lead poisoning is considered to be a threshold illness. According to this “threshold point of view”, only blood lead reaches or exceeds a certain level (60 ~ 80μg / 100ml) when the symptoms will occur, blood lead levels and clinical manifestations must be consistent; early clinical manifestations of poisoning is not yet clear enough And specific, do not recognize the cause of lead.