🧪 钠排泄分数 FENaFENa Calculator (Fractional Excretion of Sodium)

使用说明与常见问题How-to & FAQ

「钠排泄分数 FENa」是什么？What is the FENa Calculator (Fractional Excretion of Sodium) tool?

FENa = (尿钠 × 血肌酐) / (血钠 × 尿肌酐) × 100%，常用于区分肾前性与肾性急性肾损伤。仅供学习参考，不能替代医生判断。本地处理。FENa = (urine Na × plasma creatinine) / (plasma Na × urine creatinine) × 100%, used to tell prerenal from intrinsic acute kidney injury. For learning only - not medical advice. Processed locally.

如何使用「钠排泄分数 FENa」？How do I use the FENa Calculator (Fractional Excretion of Sodium) tool?

填写尿钠、血钠、尿肌酐和血肌酐（两种肌酐使用同一单位），即可得到钠排泄分数 FENa。仅供学习，不构成医疗建议。结果会随输入实时更新。Enter urine sodium, plasma sodium, urine creatinine and plasma creatinine (both creatinine values in the same unit) to get FENa. For learning only, not medical advice. The result updates as you type.

用了利尿剂？On diuretics?

利尿剂会让 FENa 偏高，此时常改用尿素排泄分数 FEUrea。Diuretics raise FENa; FEUrea is often used instead.

能举个计算实例吗？Can you show a worked example?

例如在「钠排泄分数 FENa」中填 尿钠 mmol/L = 40，血钠 mmol/L = 140，尿肌酐 = 100，血肌酐（与尿肌酐同单位） = 1.2，结果区显示：FENa：0.34%；提示：< 1%：倾向肾前性For example, entering Urine sodium mmol/L = 40, Plasma sodium mmol/L = 140, Urine creatinine = 100, Plasma creatinine (same unit) = 1.2 in the FENa Calculator (Fractional Excretion of Sodium) gives: FENa: 0.34%; Reading: < 1%: suggests prerenal

哪些输入会被检查？Which inputs are validated?

「钠排泄分数 FENa」会检查这些输入——「尿钠 mmol/L」、「血钠 mmol/L」、「尿肌酐」、「血肌酐（与尿肌酐同单位）」：必须填写，须大于 0；绝对值超过 10¹⁵ 的数也会被拒绝。不符合时结果区显示具体提示，不会给出数字。The FENa Calculator (Fractional Excretion of Sodium) checks its inputs — "Urine sodium mmol/L", "Plasma sodium mmol/L", "Urine creatinine", "Plasma creatinine (same unit)": required, must be greater than 0; numbers above 10¹⁵ in absolute value are rejected too. When a value fails, the result area names the problem instead of showing a number.

有哪些选项可以调整？What options can I adjust?

「钠排泄分数 FENa」的设置：「尿钠 mmol/L」默认 40；「血钠 mmol/L」默认 140；「尿肌酐」默认 100；「血肌酐（与尿肌酐同单位）」默认 1.2。每次生成结果都按当前设置处理。Settings in the FENa Calculator (Fractional Excretion of Sodium) — "Urine sodium mmol/L" default 40; "Plasma sodium mmol/L" default 140; "Urine creatinine" default 100; "Plasma creatinine (same unit)" default 1.2. The result always uses the current settings.

结果可以代替医生的建议吗？Can this replace medical advice?

不能。「钠排泄分数 FENa」基于常用公式给出估算，个体差异较大，如有健康问题请咨询医生或专业人士。No. The FENa Calculator (Fractional Excretion of Sodium) gives estimates from common formulas; individuals differ, so consult a doctor or professional for health decisions.

「钠排泄分数 FENa」免费吗？需要注册吗？Is the FENa Calculator (Fractional Excretion of Sodium) free? Do I need an account?

「钠排泄分数 FENa」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The FENa Calculator (Fractional Excretion of Sodium) is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.