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对本院遗传优生门诊1994年以来确诊的68例智力低下儿童进行了发铅测定。其中12人发铅明显超过正常值，占总数的17．6％。发铅增高的12人中，有5人为神经系统病变，1人为身材矮小，另外6例无明显医学原因。本组病例显示，铅对儿童的神经系统损害较明显。讨论了防止胎儿和儿童受铅毒害的措施。
68 cases of mentally retarded children diagnosed in our hospital since 2004 were given lead determination. Of them, 12 were significantly higher than normal hair lead, accounting for 17.6% of the total. Of the 12 people who developed elevated lead, 5 were nervous system disorders, 1 were short stature, and the other 6 had no obvious medical cause. The group of patients showed that lead to children’s nervous system damage more obvious. Discusses measures to prevent fetuses and children from being poisoned by lead.