婴幼儿腹泻病是由多病原多因素引起的，以腹泻为主的临床综合症。近３０年来本病发病率和死亡率已明显降低，但仍是婴幼儿时期的常见病和死亡原因之一［１］。治疗的关键在于消除病因，纠正水、电解质和酸碱失衡。为了提高对该病酸碱失衡的诊疗水平，降低死亡率，本文对３３８ Diarrhea in infants and young children is caused by many factors of multiple pathogens, with diarrhea-based clinical syndrome. The morbidity and mortality have been significantly reduced in the past 30 years, but it is still one of the common causes of infant and childbirth [1]. The key to treatment is to eliminate the cause, correct water, electrolyte and acid-base imbalance. In order to improve the diagnosis and treatment of the disease acid-base imbalance and reduce mortality, this article 338