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已经证明学龄期儿童、成人,伴有或不伴有肾脏疾病的情况下,存在肾功能储备(RFR)。而对老年人还没有系统的研究,尽管该年龄组常需要肾脏病方面的医疗。肾小球滤过率(GFR)每年下降0.8~1ml/min/1.73m~2(以下单位相同;0.01334~0.01667ml·s~(-1)/1.73m~2,1ml/min/1.73m~2=0.01667ml·s~(-1)/1.73m~2),从20到90岁,GFR由120下降至50,被认为是正常的。假设RFR随年龄增加而变化有四种方式:(1)GFR下降的过程中RFR首先下降;(2)RFR与下降的GFR成比例变小;(3)老年人RFR与青年
Kidney function reserve (RFR) has been demonstrated in school-age children, adults, with or without kidney disease. There is no systematic study of the elderly, though the age group often needs medical attention on kidney problems. Glomerular filtration rate (GFR) decreased 0.8 ~ 1ml / min / 1.73m ~ 2 (the following units are the same; 0.01334 ~ 0.01667ml · s -1 /1.73m ~ 2,1ml/min/1.73m ~ 2 = 0.01667ml · s -1 /1.73m ~ 2), from 20 to 90 years old, GFR decreased from 120 to 50, is considered normal. There are four ways to hypothesize that RFR varies with age: (1) RFR decreases first and then decreases; (2) RFR decreases proportionally to decreased GFR; (3)