Lead poisoning is known as the invisible killers of children. Usually considered children of 0--6 highly sensitive to the toxic effects of lead, later as age increases, the more resistance to lead toxicity is strong.
In recent years, become the focus of attention in the community of lead poisoning in children. Generally, heavy of above lead poisoning, is Dang children blood lead level than or equal to 450 µg/rose above Shi, can on children General more system caused damage: as damage hematopoietic system caused serious anemia; damage liver and kidney function; damage digestive system led serious abdominal colic, and constipation and nausea vomiting; damage nervous system serious effect children of intelligence, and produced dizziness, and headache, even led poisoning sexual brain disease, appears coma and death,.
In the of children lead poisoning, may produced minor anemia symptoms; effect children of behavior development, led children produced impulse, and violence, and solitary addiction, exception behavior; damage children of memory, and attention, and reading ability and abstract thinking ability, effect children of Intelligence Development; interference children body vitamin d metabolism, effect calcium of absorption, even effect medical growth; some children may will appears constipation, and abdominal pain, digestive system symptoms. Long-term at this level can also increase the chances of adult hypertension after, or even damage the reproductive adult, and so on.
For mild lead poisoning in children, extensive research confirms: blood lead level of influence on the intellectual development of children, and so there is a. Children\'s blood lead level of each increased by 100 µg/l, IQ to drop 6--8.
After 10 years of efforts, especially the increase of environmental pollution control, average blood lead level of children in China has a clear downward trend. Since 1997 in some cities such as Beijing, Shanghai took the lead in promoting the use of lead-free gasoline, lead concentrations in the environment has been a significant reduction; 1998, Shanghai on achieving the goals of urban household liquefied gas rate 100%, means the Elimination of the family indoor small environmental lead pollution caused by burning coal.
Current average blood lead levels of children in most cities of China 50--90 µg/l, more than 100 µg/l in 10--40%, and more than 200 µg/l ratio is less than 1--2%, children\'s blood lead levels higher than 450 mg/l, need to lead with drug treatment rate is lower.
Xinhua Hospital of Shanghai second Medical University is the main body of research and clinical prevention and treatment of lead poisoning in China. Many parents of children is so raring to carry to out-patient medical treatment, they have been in some business units to receive a free lead, identify children lead contents in \"serious excessive\", and was told that need to accept the so-called taking thousands of dollars or a course of treatment and health care products.
But with regular venous blood checking, these children\'s blood lead above 90% are currently recognized within an acceptable range. In the last two years nearly 3,000 presenting expert outpatient service of lead poisoning in children, really need to lead in the treatment of only 8.
Professor Shen Xiaoming said: we live in a \"lead\" in the world, lead almost everywhere. Current exaggerated \"lead poisoning\", did not rule out some enterprises for the purpose of economic interest.
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