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Renal Emergency Medicine Gastroenterology Moderate — standard screening tool; not specific on its own

BUN/Creatinine Ratio

The ratio of blood urea nitrogen (urea) to creatinine helps differentiate pre-renal from intrinsic renal causes of acute kidney injury, and can identify upper GI bleeding.

References

Related

Curated clinical cross-links plus same-class fallbacks.

Decision support only — verify against MDCalc, NICE, or your local guideline before clinical use.