What symptom does child lead poisoning have?
summary
Lead and its compounds are toxic to all tissues of human body. The way of poisoning is to inhale its vapor or dust from the respiratory tract, and then phagocytes in the respiratory tract quickly carry it to the blood; Or through the digestive tract absorption, into the blood circulation and poisoning. The poisoning patients usually have a history of exposure to lead and lead compounds. What symptom does child lead poisoning have? Let's talk about it.
What symptom does child lead poisoning have?
Symptoms of lead poisoning: when blood lead is extremely high, it is more than 70 μ g / dl, causing convulsion and coma; Long term sequelae can lead to neurological and cognitive impairment. Moderate blood lead poisoning, 45-69 μ g / dl, can cause some non-specific symptoms, such as fatigue, irritability, drowsiness, abdominal discomfort, inattention, headache, tremor, vomiting and weight loss. The blood lead level can also affect the neuroendocrine system, thereby affecting growth. Low level lead exposure, 10-44 μ g / dl, has controversial effects on children's development. Most studies have shown that there is a moderate correlation between the increased blood lead level of children and the lower IQ score of school-age children. At the same time, studies have shown that language impairment and attention deficit with hyperactivity disorder are associated with early lead exposure in children.
Source of lead: at present, the biggest risk of lead exposure is pica or eating some non food things, especially in children with developmental disorders. Although lead free paint has been used outdoors for many years, many children still live in old style houses, and they are more vulnerable to paint and plaster, especially those with extensive developmental disorders. After the use of unleaded gasoline in China, the chance of exposure to lead by gas has gradually decreased, except around heavy industrial factories. With the government's attention to food safety, the lead content in children's food will be significantly reduced. However, it should be noted that some crops grown in soils with high lead content may have high lead content; In addition, high fat food will increase the absorption of lead in the gastrointestinal tract; Food stored in open cans, acidic food stored in ceramic containers, food processed with lead contaminated water, Chinese herbal medicine or other traditional medicines can also increase the exposure to lead.
Lead poisoning harm: the harm of lead poisoning is mainly manifested in the terminal damage to the nervous system, blood system, cardiovascular system, skeletal system, etc.: lead has a direct toxic effect on specific nerve structures in multiple central and peripheral nervous systems. In the central nervous system, cerebral cortex and cerebellum are the main target tissues of lead toxicity; In the peripheral nervous system, motor axons are the main target tissues of lead poisoning. Among them, the poisoning of lead on the nervous system is mainly manifested in the following four aspects: (1) lead poisoning causes psychological changes, such as depression, irritability, personality change and other symptoms in adults, while hyperactivity in children（ 2) Lead poisoning can lead to mental decline, especially children with learning disabilities. It is reported that the IQ of high lead children is 4-6 points lower than that of low lead children（ 3) Lead poisoning can lead to sensory dysfunction, for example, many lead poisoning patients will have visual dysfunction: retinal edema, retrobulbar optic neuritis, blind spot, abducens palsy, optic atrophy, eye movement disorders, abnormal pupil regulation, amblyopia or visual field changes; Or olfactory, taste disorders（ 4) The main effect of lead on peripheral nervous system is to reduce motor function and nerve conduction velocity. Muscle damage is one of the typical evidences of severe lead poisoning.
matters needing attention
In the case of not knowing the reason, parents should not give their children indiscriminate use of treatment, should take their children to the national regular hospital, by the doctor to determine the best treatment. So as not to delay the disease, lead to the adverse development of the disease, and have a significant impact on the physical and mental health of children.
