婴幼儿因为其特殊的生理结构常常吐奶，吐奶量较大的，又随时可能发生呛奶，即吐出的奶又随呼吸进入了呼吸道。婴儿的神经系统刚刚发育，一些反射还很薄弱，他们无力也不能把呛入呼吸道的奶咯出。于是，常因奶液对气道机械性阻塞严重而发生窒息。同时婴儿的大脑细胞对氧气十分 Infants and young children because of their special physiological structure often spit milk, spit milk larger, and choking milk may occur at any time, that is, spit milk and breathing into the respiratory tract. The baby’s nervous system has just developed, some reflexes are still weak and they are unable or unable to choke into the respiratory tract. As a result, often due to mechanical obstruction of the airway serious milk and suffocation occurs. At the same time the baby’s brain cells are very oxygen