肾脏由肾单位所组成,是机体最大的排泄器官,其机能主要是维持体液的体内情况稳定。肾功能衰竭时由于肾单位的破坏甚至消失,包括肾小管、肾小球的肥大、萎缩,这样肾单位数量的减少必然会产生体液调节异常和一系列代谢的变化,表现以代谢异常为中心的复杂临床征象,因此深入的了解这些代谢变化,对于进一步认识肾功能衰竭的 The kidney is composed of nephrons and is the largest excretory organ in the body. Its function is mainly to maintain the body fluid in a stable condition. Renal failure due to failure or even disappearance of renal units, including tubules, glomerular hypertrophy, atrophy, so that the reduction of the number of nephrops will inevitably produce abnormalities in body fluid regulation and a series of metabolic changes, the performance of metabolic abnormalities as the center Complex clinical signs, so in-depth understanding of these metabolic changes, for further understanding of renal failure