National standard What is the normal value of blood lead

0--99 micrograms liter (l).

International criteria for the diagnosis of blood lead: 100 micrograms or more than 100 micrograms for lead poisoning.

Normal blood lead level: 0--99 micrograms liter (L).

100-199 micrograms l for lead poisoning.

200--249 micrograms l for mild poisoning.

250--449 micrograms for moderate poisoning.

Poisoning is severe if it is equal to or higher than 450 micrograms.

Blood lead standards in children.

Diagnosis of hyperleademia and lead poisoning in children is based on the level of lead in the child's venous blood.

Hyperleademia: two consecutive venous blood lead levels of 100 199 ug L;

Lead poisoning: two consecutive venous blood lead levels equal to or higher than 200ug L; It is classified into mild, moderate, and severe lead poisoning according to blood lead levels.

Mild lead poisoning: blood lead level of 200 249 ug l;

Moderate lead poisoning: blood lead level of 250 449 ug l;

Severe lead poisoning: blood lead level equal to or higher than 450ug l;

The best indicator of a child's exposure to lead within 1-3 months is whole blood lead levels, or blood lead for short. Blood lead is easy to measure and has a good correlation with other indicators, and there is a standard method, which has been used by hospitals to better reflect the lead load in children. Of the several methods used to measure blood lead levels, blood drawn from a vein is the most accurate way to check blood levels.

At present, the diagnosis and grading of lead poisoning in children is generally recognized according to the blood lead level, which is divided into five grades: blood lead less than 99 micrograms (milligrams) liters, which is relatively safe;

Grade: 100-199 μg L of blood lead, mild lead poisoning, affected heme metabolism, decreased nerve conduction velocity;

Grade: 200-499 micrograms of blood lead, moderate lead poisoning, affected iron, zinc and calcium metabolism, calcium deficiency, zinc deficiency, hemoglobin synthesis disorders, may have symptoms such as low immunity, learning difficulties, poor concentration, decreased IQ level or physical growth retardation;

Grade: 500-699 micrograms of blood lead, severe lead poisoning, can appear personality changes, irritability, hyperactivity, aggressive behavior, movement disorders, vision and hearing loss, unexplained abdominal pain, anemia and arrhythmia and other poisoning symptoms;

Grade: 700 mcg liters of blood lead, which can lead to kidney damage, lead encephalopathy, and even death.

If the amount of lead in the body is slightly higher, attention should be paid to the intake of divalent ions such as calcium, iron and zinc, so as to reduce the accumulation of lead. If the blood lead is less than 45ug di, non-drug lead removal should be used, including frequent hand washing, regular household cleaning, and eating less lead-containing food. The second is to use some health care products with lead removal function, such as sea cucumber, kelp, seaweed, black dates, green onions, oatmeal, oolong tea, prickly pear, kiwifruit, etc., and dietary fiber and other foods also have the effect of lead removal.

A normal human blood lead level of 0-99 micrograms, equal to or greater than 100 micrograms, is enough to diagnose lead poisoning, equal to or higher than 450 micrograms L for severe poisoning.

Blood lead refers to the amount of lead in the blood. Lead is harmful to the human body, and excessive blood lead will cause a series of abnormal manifestations of the body's nervous system, blood system, and digestive system, affecting the normal function of the human body. Environmental pollution can lead to an increase in human blood lead, which often causes mass poisoning incidents.