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发热在一定限度内属于一种生理性的防御机制。发热时机体网状内皮系统和垂体——肾上腺皮质系统的功能增强,对机体抗病斗争是有利的,因此不可见发热就滥用降热药。但是长期的发热或过高热,对机体会产生严重的影响。高热可加速体内各种代谢过程,耗氧量增加,尤以脑组织为明显,持续高热必然要导致脑缺氧,而脑组织对缺氧极为敏感。如肛温持续升高超过41℃,便可引起永久性的脑损伤。高热持续在42℃以上,时间超过2～4小时,常致休克及严重并发症,可因呼吸循环功能衰竭而死亡。故对高热的小儿应及时给予恰当的处理。
Fever within a certain limit belongs to a physiological defense mechanism. Fever reticuloendothelial system and the pituitary - adrenal system enhances the function of the body fight disease is beneficial, so invisible fever on the abuse of antipyretics. However, long-term fever or overheating can have a serious impact on the body. High fever can speed up the body’s various metabolic processes, increased oxygen consumption, especially in brain tissue is obvious, sustained high fever will inevitably lead to cerebral hypoxia, and brain tissue is extremely sensitive to hypoxia. If the rectal temperature continues to rise above 41 ℃, can cause permanent brain damage. High fever continued at 42 ℃ for more than 2 to 4 hours, often caused by shock and severe complications, can be due to respiratory failure and death. Therefore, children with high fever should be promptly given appropriate treatment.