<International Circulation>: There is currently no uniform standard for risk stratification for venous thromboembolism.

What is your view?

 《国际循环》：目前静脉血栓栓塞危险分层无统一标准？您对此有何看法？

    Prof. Perrier: It is important to try to validate one of the existing scores because there at least two that are being more widely applied. The difficulty is that it is almost impossible to have a randomized study giving prophylaxis to one set of patients and not giving prophylaxis to another set of patients and evaluating if the scores work adequately. Therefore， this is an important limitation.

    Perrier教授：尝试验证现有评分之一非常重要，因为正在更广泛应用的评分至少有两种。困难在于几乎不可能开展这样一项随机研究：对一组患者给予预防，而对另一组患者不加预防，以评估评分是否充分发挥作用。因此，这是一个重要的限制。

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