肾脏是调节体液的重要器官。它保留体内所需物质，排泄代谢废物，维持水、电解质和酸碱平衡。使抗体内环境保持相对稳定。测定肾功能的指标很多。小儿肾功能指标早有记述，而对新生儿、极低出生体重儿的肾功能文献中尚缺乏了解。本文介绍近年国外在这方面的研究结果。一、肾小 The kidney is an important organ that regulates body fluids. It retains the substances needed in the body, excretes metabolic waste, and maintains water, electrolytes and acid-base balance. Antibody to maintain a relatively stable environment. There are many indicators of renal function. Pediatric renal function indicators have long been described, but the neonatal, very low birth weight children’s renal function is still lack of understanding of the literature. This article describes the research results of foreign countries in this area in recent years. First, small kidneys