Why is Lead Exposure Dangerous?
Lead is a heavy metal with multiple organ toxicity and does not have any physiological effect in the human body. Normal people's body should not contain lead, but due to the development of modern industry, the widespread use of lead-containing items and the accumulation of environmental pollution, we have more and more opportunities for contact with lead, causing some lead dust to invade the body and make us The blood and tissues contain more or less lead, and the academic community calls this pathological process "lead exposure" or "lead exposure".
Lead exposure
Right!- Chinese name
- Lead exposure
- Adult female blood lead
- Concentrations over 200 g / L
- Adult male blood lead
- Concentrations over 250 g / L
- Time
- year 2004
- Lead is a heavy metal with multiple organ toxicity and does not have any physiological effect in the human body. Normal people's body should not contain lead, but due to the development of modern industry, the widespread use of lead-containing items and the accumulation of environmental pollution, we have more and more opportunities for contact with lead, causing some lead dust to invade the body and make us The blood and tissues contain more or less lead, and the academic community calls this pathological process "lead exposure" or "lead exposure".
- Lead invades the body, first enters the blood and blood cells to cause blood lead to rise, and then travels through the body with blood circulation, and deposits in organs such as the brain, bones, bone marrow, liver and kidney, causing damage and dysfunction of these organs. Loss of strength, memory loss, dizziness, headache, decreased learning ability, decreased IQ, fatigue, weakness in hands and feet, anemia, abdominal cramps, visual and auditory abnormalities, convulsions, convulsions, multiple organ failure, coma and even death. The higher the level of lead exposure, the younger a person is (especially the fetus) and the more toxic the body is. At present, timely monitoring of lead concentration in blood has become an important means of preventing and controlling lead exposure internationally.
- Adults have a relatively strong tolerance for lead toxicity. Foreign academics believe that the adult women's blood lead concentration exceeds 200 micrograms per liter, the hematopoietic function will be damaged, and they will also show neurasthenia syndromes; adult male blood lead concentrations will exceed 250 micrograms. / L, damage to the hematopoietic system will also occur. Children are extremely sensitive to the toxicity of lead. The 1994 World Congress of Pediatrics passed: As long as the blood lead content of children exceeds 100 micrograms / liter, children are diagnosed with lead poisoning, blood lead, with or without clinical symptoms and other biochemical changes. More than 200 micrograms / liter is moderate lead poisoning. The relevant regulations of the Ministry of Health of China point out that the upper limit of acceptable blood lead concentration for adults is 450 micrograms / liter, the blood lead concentration of children exceeding 100 micrograms / liter should be diagnosed as hyperleademia, and more than 200 micrograms / liter is diagnosed as lead poisoning in children.
- At present, domestic and foreign experts have recognized that children's blood lead in excess of 50 micrograms / liter will affect the child's intellectual development and problems in reading, computing, memory and attention. Research from the World Health Organization in 2004 confirmed that children with blood lead concentrations in excess of 25 micrograms / liter are at risk for dental caries and abnormal learning behaviors. Therefore, any blood lead concentration is considered unsafe for children. For children with mild lead exposure, experts recommend that drugs be used to remove lead with caution. You can change health habits and diet structure by staying away from lead pollution, and use some functional foods to promote lead discharge.