Figure 821

Estimating prognosis. The criteria for estimating prognosis in acute renal failure can be classified into four periods. The Classical or heuristic way is similar to that used since the Hippocratic aphorisms. The Traditional one based on simple statistical procedures, is not useful for individual prognosis. The Present form is more or less complex, depending on what method is used, and it is possible, thanks to computing facilities and the development of multivariable analysis. Theoretically, few of these methods can give an individual prognosis [19]. They have not been used for triage. The next step will need a great deal of work to design and implement adequate tools to stratify risks and individual prognosis. In addition, the estimate of residual renal function and survivors' quality of life, mainly for older people, are future challenges.

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