The expert such as Li Yimin of center of health care of children of Tianjin city woman points out, usually the opportunity of children happening lead poisoning exceeds adult 30 multiple. Main reason is children is in grow growth phase, a lot of organs are immature, alexipharmic function is not perfect, the easy sensibility to lead relatively adult is tall, decided children lead metabolization has 3 apparent characteristics:
It is to absorb much.
Children is used to putting hand and toy in the absorb in the mouth, than common adult more contacts plumbic opportunity, its are as high as 42%-53% to plumbic absorptivity through enteron, it is 5 times of adult about.
Children is old to the demand of food and oxygen, the food that every kilograms of weight absorbs relatively adult is apparently much, the plumbic amount that absorbs through food way is opposite also more; And the gastric platoon of children is empty relatively adult is gotten quickly much, the absorptivity that makes lead increases substantially.
The characteristic that lead distributings in air is closer from the ground chroma taller, children figure is short, connect tolerance opposite bigger, measure 5-6 of growner National People's Congress from the inspiratory lead in air everyday times.
2 it is to excrete rate is low.
Children absorbs the lead inside body only outside 75% eduction body, the plumbic reserve that still has 1/4 left and right sides is inside body, and adult criterion outside 99% eduction body. When inspiratory plumbic dirt is added on respiratory tract mucous membrane, adult is OK through spitting this kind of normal physiology reacts eduction of will major lead, and children form does not react into this kind, also swallow enteron mostly with respect to will inspiratory bigger lead grain, inspiratory hind pass through lung and gastric bowel extremely easily again inspiratory blood.
3 it is skeletal medium plumbic fluidity is great.
The lead inside children form is only in skeleton of existence of 75% lay aside, and these lead move easily still to the middle of blood and parenchyma, and the lead inside adult body in skeleton of existence of 90% lay aside.

Previous:Children learns to give birth to pressure easily in the morning too
Next：B exceeds do much darling conversation is late