🧪 BUN/Creatinine Ratio
UseWhen to use: quick bedside adjunct while evaluating AKI / volume status.
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Strata>20 often prerenal-leaning; <10 intrinsic-leaning; many exceptions (GI bleed, diet).
LimitsWhen not to use: as the sole AKI classification. · Pitfall: wrong units (urea vs BUN). · Use FeNa/FeUrea and exam together.
SourceClassic nephrology bedside teaching (BUN/Cr ratio)
Runs locally in your browser (no PHI uploaded). For licensed clinicians — not a substitute for clinical judgement.
Stored on this device for revisit reminders
This-shift next steps
After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.
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Methodology · worked example, guidelines & full notes
Clinical takeaway
Simple ratio.
When to use
When to use: quick bedside adjunct while evaluating AKI / volume status.
How it works
Ratio = BUN (mg/dL) ÷ creatinine (mg/dL).
Key points
- Simple ratio.
- Nonspecific.
- Next: FeNa / FeUrea / KDIGO AKI.
References
- Classic nephrology bedside teaching (BUN/Cr ratio)
Verification & sources · governance
FAQ
Frequently asked questions
- Does BUN/Creatinine Ratio upload patient data? Where is it calculated?
- Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.